Flashbench-results

flashbench-results@lists.linaro.org

15 participants
919 discussions

by Arnd Bergmann

Disk /dev/mmcblk0: 3976 MB, 3976200192 bytes 4 heads, 16 sectors/track, 121344 cylinders, total 7766016 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 ==> /sys/block/mmcblk0/device/block <== head: error reading `/sys/block/mmcblk0/device/block': Is a directory ==> /sys/block/mmcblk0/device/cid <== 275048534430344730b00dd71400a900 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900001d9f7f800a400000 ==> /sys/block/mmcblk0/device/date <== 09/2010 ==> /sys/block/mmcblk0/device/driver <== head: error reading `/sys/block/mmcblk0/device/driver': Is a directory ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x3 ==> /sys/block/mmcblk0/device/manfid <== 0x000027 ==> /sys/block/mmcblk0/device/name <== SD04G ==> /sys/block/mmcblk0/device/oemid <== 0x5048 ==> /sys/block/mmcblk0/device/power <== head: error reading `/sys/block/mmcblk0/device/power': Is a directory ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235800001000000 ==> /sys/block/mmcblk0/device/serial <== 0xb00dd714 ==> /sys/block/mmcblk0/device/subsystem <== head: error reading `/sys/block/mmcblk0/device/subsystem': Is a directory ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=SD04G MODALIAS=mmc:block $ sudo ./flashbench -a /dev/mmcblk0 -b 1024 --count=30 align 402653184 pre 1.95ms on 2.87ms post 1.56ms diff 1.12ms align 268435456 pre 2.2ms on 3.04ms post 1.6ms diff 1.14ms align 201326592 pre 2.51ms on 2.99ms post 1.59ms diff 940µs align 134217728 pre 2.38ms on 2.94ms post 1.59ms diff 950µs align 100663296 pre 2.24ms on 3.01ms post 1.6ms diff 1.09ms align 67108864 pre 2.47ms on 2.87ms post 1.51ms diff 880µs align 50331648 pre 2.45ms on 2.97ms post 1.57ms diff 960µs align 33554432 pre 2.6ms on 2.96ms post 1.57ms diff 876µs align 25165824 pre 2.57ms on 2.94ms post 1.58ms diff 872µs align 16777216 pre 2.28ms on 2.99ms post 1.59ms diff 1.05ms align 12582912 pre 2.22ms on 2.92ms post 1.6ms diff 1.01ms align 8388608 pre 2.54ms on 2.93ms post 1.55ms diff 880µs align 6291456 pre 1.7ms on 1.86ms post 1.57ms diff 226µs align 4194304 pre 2.35ms on 2.82ms post 1.56ms diff 868µs align 3145728 pre 1.51ms on 1.67ms post 1.5ms diff 172µs align 2097152 pre 1.56ms on 1.72ms post 1.49ms diff 190µs align 1572864 pre 1.5ms on 1.67ms post 1.49ms diff 176µs align 1048576 pre 1.5ms on 1.67ms post 1.49ms diff 173µs align 786432 pre 1.5ms on 1.67ms post 1.49ms diff 173µs align 524288 pre 1.5ms on 1.67ms post 1.5ms diff 172µs align 393216 pre 1.5ms on 1.67ms post 1.49ms diff 169µs align 262144 pre 1.5ms on 1.67ms post 1.49ms diff 169µs align 196608 pre 1.5ms on 1.67ms post 1.5ms diff 174µs align 131072 pre 1.51ms on 1.67ms post 1.49ms diff 171µs align 98304 pre 1.51ms on 1.67ms post 1.49ms diff 176µs align 65536 pre 1.49ms on 1.67ms post 1.5ms diff 175µs align 49152 pre 1.5ms on 1.66ms post 1.49ms diff 169µs align 32768 pre 1.49ms on 1.66ms post 1.48ms diff 174µs align 24576 pre 1.5ms on 1.67ms post 1.49ms diff 173µs align 16384 pre 1.5ms on 1.67ms post 1.49ms diff 173µs align 12288 pre 1.49ms on 1.54ms post 1.49ms diff 45.8µs align 8192 pre 1.49ms on 1.67ms post 1.49ms diff 175µs align 6144 pre 1.49ms on 1.57ms post 1.52ms diff 65.2µs align 4096 pre 1.49ms on 1.53ms post 1.49ms diff 44.8µs align 3072 pre 1.49ms on 1.53ms post 1.49ms diff 42.1µs align 2048 pre 1.49ms on 1.53ms post 1.49ms diff 43.7µs == > 4 MB erase block, 8 KB page ? $ sudo ./flashbench --open-au --open-au-nr=1 /dev/mmcblk0 --blocksize=512 4MiB 6M/s 2MiB 3.71M/s 1MiB 3.72M/s 512KiB 3.73M/s 256KiB 3.77M/s 128KiB 5.7M/s 64KiB 11.7M/s 32KiB 8.8M/s 16KiB 6.57M/s 8KiB 4.01M/s 4KiB 1.33M/s 2KiB 563K/s 1KiB 10.2K/s 512B 8.54K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au /dev/mmcblk0 --blocksize=2048 --open-au-nr=2 4MiB 8.35M/s 2MiB 6.47M/s 1MiB 2.89M/s 512KiB 1.4M/s 256KiB 697K/s 128KiB 348K/s 64KiB 174K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au --open-au-nr=1 /dev/mmcblk0 --blocksize=2048 --random 4MiB 5.74M/s 2MiB 2.5M/s 1MiB 1.45M/s 512KiB 802K/s 256KiB 560K/s 128KiB 279K/s $ sudo ./flashbench --findfat --fat-nr=5 /dev/mmcblk0 --blocksize=2048 --random 4MiB 2.4M/s 2.78M/s 6.02M/s 11.7M/s 11.8M/s 2MiB 2.52M/s 2.77M/s 4.56M/s 3.76M/s 3.76M/s 1MiB 2.73M/s 2.51M/s 1.65M/s 1.59M/s 1.59M/s 512KiB 2.58M/s 2.77M/s 862K/s 855K/s 855K/s 256KiB 2.4M/s 2.73M/s 556K/s 528K/s 555K/s 128KiB 2.4M/s 2.74M/s 271K/s 271K/s 271K/s 64KiB 2.08M/s 2.5M/s 258K/s 258K/s 258K/s 32KiB 1.88M/s 2.31M/s 142K/s 142K/s 142K/s

15 years

Fwd: Kingston 8GB Datatraveler DT101 G2

by Ajax Criterion

Oops--forgot to 'reply all' to the list! ---------- Forwarded message ---------- From: Ajax Criterion <ajax.criterion(a)gmail.com> Date: Thu, 28 Jul 2011 07:28:53 -0700 Subject: Re: [Flashbench] Kingston 8GB Datatraveler DT101 G2 To: Arnd Bergmann <arnd(a)arndb.de> On Thu, Jul 28, 2011 at 6:30 AM, Arnd Bergmann <arnd(a)arndb.de> wrote: > On Thursday 28 July 2011, Ajax Criterion wrote: > >> --> aligned to 4MB blocks. FAT 32 in the front, EXT4 in the back >> again (I'll likely destroy this again with the --findfat test, but >> what the hell... FS in the back will get changed around a lot while I >> benchmark multiple filesystems). > > The --open-au test also destroys the data, you just might be able > to run a little bit longer. There is generally no reason to even > create a partition table in order to run flashbench, just boot from > a different drive than the one you want to test. > >> bash-4.1# flashbench -O --open-au-nr=10 /dev/sdc >> --erasesize=$[4*1024*1024] --blocksize=4096 >> 4MiB 11.8M/s >> 2MiB 13.2M/s >> 1MiB 13.6M/s >> 512KiB 13.6M/s >> 256KiB 13.5M/s >> 128KiB 11.2M/s >> 64KiB 15.2M/s >> ^C >> ^C >> bash-4.1# flashbench -O --open-au-nr=13 /dev/sdc >> --erasesize=$[4*1024*1024] --blocksize=4096 >> 4MiB 6.54M/s >> 2MiB 5.55M/s >> 1MiB 5.95M/s >> 512KiB 3.15M/s >> 256KiB 2.51M/s >> 128KiB 894K/s >> 64KiB 467K/s >> ^C >> bash-4.1# flashbench -O --open-au-nr=12 /dev/sdc >> --erasesize=$[4*1024*1024] --blocksize=4096 >> 4MiB 6.07M/s >> 2MiB 5.83M/s >> 1MiB 5.9M/s >> 512KiB 5.95M/s >> 256KiB 5.45M/s >> 128KiB 4.91M/s >> 64KiB 4.82M/s >> 32KiB 4.44M/s >> 16KiB 2.86M/s >> 8KiB 772K/s >> ^C >> bash-4.1# >> >> ---> There seems to be a clear breakdown after 12 AU's ... > > Yes, that is pretty clear from your numbers. > >> why am I >> bouncing around between 5-6 and 11-13 M/s?? > > I'm not sure, but what I can imagine is happening is that > the drive can switch each erase block between linear optimized > more (13 MB/s) and random access mode (6 MB/s). When you do > something that has a random pattern, including going beyond > 12 erase blocks, it will go into the random mode, in order to > cope at all. After writing linearly a few times, the controller > decides to get back into linear optimized mode. This is > a very smart thing to do for the controller. > Very interesting -- I'm quite pleased with the results for this drive, I'm looking forward to benchmarking it some more, now that I know how to properly align and test it! >> bash-4.1# flashbench -O --open-au-nr=12 /dev/sdc >> --erasesize=$[4*1024*1024] --blocksize=4096 --random >> 4MiB 11.2M/s >> 2MiB 8.51M/s >> 1MiB 5.8M/s >> 512KiB 3.6M/s >> 256KiB 5M/s >> 128KiB 3.86M/s >> 64KiB 3.12M/s >> 32KiB 3.23M/s >> 16KiB 1.89M/s >> ^C >> bash-4.1# flashbench -O --open-au-nr=13 /dev/sdc >> --erasesize=$[4*1024*1024] --blocksize=4096 --random >> 4MiB 8.89M/s >> 2MiB 7.31M/s >> 1MiB 5.55M/s >> 512KiB 3.7M/s >> 256KiB 4.99M/s >> 128KiB 3.74M/s >> 64KiB 3.11M/s >> 32KiB 3.25M/s >> ^C >> bash-4.1# flashbench -O --open-au-nr=15 /dev/sdc >> --erasesize=$[4*1024*1024] --blocksize=4096 --random >> 4MiB 9.85M/s >> 2MiB 7.47M/s >> 1MiB 4.7M/s >> 512KiB 2.54M/s >> 256KiB 995K/s >> ^C >> bash-4.1# flashbench -O --open-au-nr=14 /dev/sdc >> --erasesize=$[4*1024*1024] --blocksize=4096 --random >> 4MiB 7.13M/s >> 2MiB 5.82M/s >> 1MiB 4.01M/s >> 512KiB 3.67M/s >> 256KiB 4.94M/s >> 128KiB 3.23M/s >> 64KiB 3.43M/s >> 32KiB 3.37M/s >> 16KiB 1.79M/s >> ^C >> >> --looks to be 14 open AU's for random. > > Yes. > >> bash-4.1# mkdir /mnt/sdc1 >> bash-4.1# mount /dev/sdc1 /mnt/sdc1 >> bash-4.1# umount /dev/sdc1 >> >> ---> mounts fine. > > Just lucky that you didn't overwrite any actual data. flashbench does > not write into the first 16 MB on the --open-au test in order to avoid > the FAT optimized blocks, so if all your important data is there, you > won't notice the damage. > OK, understood. Thanks for clarifying! I thought maybe my drive would copy the underlying data out of the way to another location, but I guess that's not the case :) >> bash-4.1# flashbench --findfat --fat-nr=8 --erasesize=$[4*1024*1024] >> --random --blocksize=512 /dev/sdc >> 4MiB 4.96M/s 13.4M/s 13.3M/s 13.4M/s 13.3M/s 13.4M/s 13.3M/s 13.3M/s >> 2MiB 5.16M/s 9.27M/s 9.28M/s 9.22M/s 9.19M/s 9.39M/s 9.16M/s 9.43M/s >> 1MiB 5.24M/s 5.86M/s 5.86M/s 5.84M/s 5.85M/s 5.9M/s 5.87M/s 5.92M/s >> 512KiB 5.29M/s 3.77M/s 3.77M/s 3.77M/s 3.77M/s 3.77M/s 3.77M/s 3.77M/s >> 256KiB 2.92M/s 5.5M/s 5.49M/s 5.51M/s 5.48M/s 5.49M/s 5.5M/s 5.46M/s >> 128KiB 4.54M/s 4.61M/s 4.61M/s 4.61M/s 4.6M/s 4.62M/s 4.6M/s 4.61M/s >> 64KiB 4.16M/s 3.58M/s 3.6M/s 3.6M/s 3.6M/s 3.59M/s 3.59M/s 3.6M/s >> 32KiB 5.61M/s 4.17M/s 4.17M/s 4.18M/s 4.19M/s 4.19M/s 4.18M/s 4.18M/s >> 16KiB 4.1M/s 2.83M/s 2.83M/s 2.83M/s 2.82M/s 2.82M/s 2.83M/s 2.82M/s >> 8KiB 1.35M/s 1.33M/s 1.33M/s 1.33M/s 1.33M/s 1.33M/s 1.33M/s 1.33M/s >> 4KiB 743K/s 839K/s 837K/s 838K/s 838K/s 838K/s 838K/s 838K/s >> ^C > > I think there is nothing to see here. > >> For some reason, when I run a scatter plot, I get a very long straight >> line...I'm trying to sort that out to get a better read, to verify the >> 4MB eraseblock... > > It's quite possible that that's all you can get out of this drive. > > Arnd > I did run one more series of tests, just to make absolutely sure the eraseblock size is correct. Now that I understand this test, and how it works, I really like it: bash-4.1# for i in 1 2 3 4 6 8 ; do > echo Size $[$i * 1024 * 1024] > flashbench --erasesize=$[$i * 1024 * 1024] --blocksize=$[$i * 1024 * 1024] --open-au --open-au-nr=10 /dev/sdc > echo Size $[$i * 1024 * 1024], offset $[$i/2 * 1024 * 1024] > flashbench --erasesize=$[$i * 1024 * 1024] --blocksize=$[$i * 1024 * 1024] --open-au --open-au-nr=10 --offset=$[$i/2 * 1024 * 1024] /dev/sdc > done Size 1048576 1MiB 10.2M/s Size 1048576, offset 0 1MiB need .param= argument from SEQUENCE from LEN_POW2 Size 2097152 2MiB 8.09M/s Size 2097152, offset 1048576 2MiB 3.9M/s Size 3145728 3MiB 5.94M/s Size 3145728, offset 1048576 3MiB 8.9M/s Size 4194304 4MiB 8.37M/s Size 4194304, offset 2097152 4MiB 7.28M/s Size 6291456 6MiB 7.4M/s Size 6291456, offset 3145728 6MiB 6.25M/s Size 8388608 8MiB 10.4M/s Size 8388608, offset 4194304 8MiB 9.19M/s bash-4.1# for i in 1 2 3 4 6 8 ; do echo Size $[$i * 1024 * 1024]; flashbench --erasesize=$[$i * 1024 * 1024] --blocksize=$[$i * 1024 * 1024] --open-au --open-au-nr=10 /dev/sdc; echo Size $[$i * 1024 * 1024], offset $[$i/2 * 1024 * 1024]; flashbench --erasesize=$[$i * 1024 * 1024] --blocksize=$[$i * 1024 * 1024] --open-au --open-au-nr=10 --offset=$[$i/2 * 1024 * 1024] /dev/sdc; done Size 1048576 1MiB 7.52M/s Size 1048576, offset 0 1MiB need .param= argument from SEQUENCE from LEN_POW2 Size 2097152 2MiB 7.47M/s Size 2097152, offset 1048576 2MiB 3.9M/s Size 3145728 3MiB 5.24M/s Size 3145728, offset 1048576 3MiB 7.34M/s Size 4194304 4MiB 10.1M/s Size 4194304, offset 2097152 4MiB 6.78M/s Size 6291456 6MiB 7.39M/s Size 6291456, offset 3145728 6MiB 5.86M/s Size 8388608 8MiB 10.8M/s Size 8388608, offset 4194304 8MiB 9.73M/s bash-4.1# for i in 1 2 3 4 6 8 ; do echo Size $[$i * 1024 * 1024]; flashbench --erasesize=$[$i * 1024 * 1024] --blocksize=$[$i * 1024 * 1024] --open-au --open-au-nr=10 /dev/sdc; echo Size $[$i * 1024 * 1024], offset $[$i/2 * 1024 * 1024]; flashbench --erasesize=$[$i * 1024 * 1024] --blocksize=$[$i * 1024 * 1024] --open-au --open-au-nr=10 --offset=$[$i/2 * 1024 * 1024] /dev/sdc; done Size 1048576 1MiB 11M/s Size 1048576, offset 0 1MiB need .param= argument from SEQUENCE from LEN_POW2 Size 2097152 2MiB 7.01M/s Size 2097152, offset 1048576 2MiB 4.04M/s Size 3145728 3MiB 4.97M/s Size 3145728, offset 1048576 3MiB 7.85M/s Size 4194304 4MiB 9.02M/s Size 4194304, offset 2097152 4MiB 7.24M/s Size 6291456 6MiB 8.25M/s Size 6291456, offset 3145728 6MiB 5.96M/s Size 8388608 8MiB 9.35M/s Size 8388608, offset 4194304 8MiB 9.7M/s bash-4.1# for i in 1 2 3 4 6 8 9 10 11 12 13 ; do echo Size $[$i * 1024 * 1024]; flashbench --erasesize=$[$i * 1024 * 1024] --blocksize=$[$i * 1024 * 1024] --open-au --open-au-nr=10 /dev/sdc; echo Size $[$i * 1024 * 1024], offset $[$i * * 1024]; flashbench --erasesize=$[$i * 1024 * 1024] --blocksize=$[$i * 1024 * 1024] --open-au --open-au-nr=10 --offset=$[$i/2 * 1024 * 1024] /dev/sdc; done Size 1048576 1MiB 11M/s Size 1048576, offset 0 1MiB need .param= argument from SEQUENCE from LEN_POW2 Size 2097152 2MiB 7.37M/s Size 2097152, offset 1048576 2MiB 4.21M/s Size 3145728 3MiB 4.62M/s Size 3145728, offset 1048576 3MiB 7.98M/s Size 4194304 4MiB 10.2M/s Size 4194304, offset 2097152 4MiB 6.99M/s Size 6291456 6MiB 7.53M/s Size 6291456, offset 3145728 6MiB 6.23M/s Size 8388608 8MiB 9.71M/s Size 8388608, offset 4194304 8MiB 8.82M/s Size 9437184 9MiB 7.44M/s Size 9437184, offset 4194304 9MiB 9.41M/s Size 10485760 10MiB 10.1M/s Size 10485760, offset 5242880 10MiB 10.5M/s Size 11534336 11MiB 9.3M/s Size 11534336, offset 5242880 11MiB 10.9M/s Size 12582912 12MiB 11.5M/s Size 12582912, offset 6291456 12MiB 10.4M/s Size 13631488 13MiB 9.29M/s Size 13631488, offset 6291456 13MiB 10.5M/s bash-4.1# bash-4.1# for i in 1 2 3 4 6 8 9 10 11 12 13 ; do echo Size $[$i * 1024 * 1024]; flashbench --erasesize=$[$i * 1024 * 1024] --blocksize=$[$i * 1024 * 1024] --open-au --open-au-nr=10 /dev/sdc; echo Size $[$i * 1024 * 1024], offset $[$i * 512 * 1024]; flashbench --erasesize=$[$i * 1024 * 1024] --blocksize=$[$i * 1024 * 1024] --open-au --open-au-nr=10 --offset=$[$i * 512 * 1024] /dev/sdc; done Size 1048576 1MiB 3.52M/s Size 1048576, offset 524288 1MiB 9.19M/s Size 2097152 2MiB 4.37M/s Size 2097152, offset 1048576 2MiB 4.62M/s Size 3145728 3MiB 5.15M/s Size 3145728, offset 1572864 3MiB 4.29M/s Size 4194304 4MiB 10.7M/s Size 4194304, offset 2097152 4MiB 6.63M/s Size 6291456 6MiB 9.01M/s Size 6291456, offset 3145728 6MiB 6.9M/s Size 8388608 8MiB 9.62M/s Size 8388608, offset 4194304 8MiB 9.23M/s Size 9437184 9MiB 7.64M/s Size 9437184, offset 4718592 9MiB 9.03M/s Size 10485760 10MiB 10.2M/s Size 10485760, offset 5242880 10MiB 10.5M/s Size 11534336 11MiB 9.53M/s Size 11534336, offset 5767168 11MiB 9.57M/s Size 12582912 12MiB 11.7M/s Size 12582912, offset 6291456 12MiB 8.81M/s Size 13631488 13MiB 9.82M/s Size 13631488, offset 6815744 13MiB 10.3M/s bash-4.1# for i in 1 2 3 4 6 8 9 10 11 12 13 ; do echo Size $[$i * 1024 * 1024]; flashbench --erasesize=$[$i * 1024 * 1024] --blocksize=$[$i * 1024 * 1024] --open-au --open-au-nr=10 /dev/sdc1; echo Size $[$i * 1024 * 1024], offset $[$i * 512 * 1024]; flashbench --erasesize=$[$i * 1024 * 1024] --blocksize=$[$i * 1024 * 1024] --open-au --open-au-nr=10 --offset=$[$i * 512 * 1024] /dev/sdc1; done Size 1048576 1MiB 7.47M/s Size 1048576, offset 524288 1MiB 7.86M/s Size 2097152 2MiB 3.79M/s Size 2097152, offset 1048576 2MiB 4.24M/s Size 3145728 3MiB 6.31M/s Size 3145728, offset 1572864 3MiB 4.05M/s Size 4194304 4MiB 8.7M/s Size 4194304, offset 2097152 4MiB 7.29M/s Size 6291456 6MiB 7.34M/s Size 6291456, offset 3145728 6MiB 5.7M/s Size 8388608 8MiB 9.17M/s Size 8388608, offset 4194304 8MiB 9.68M/s Size 9437184 9MiB 8.09M/s Size 9437184, offset 4718592 9MiB 9.03M/s Size 10485760 10MiB 9.31M/s Size 10485760, offset 5242880 10MiB 10.5M/s Size 11534336 11MiB 9.42M/s Size 11534336, offset 5767168 11MiB 9.36M/s Size 12582912 12MiB 12.3M/s Size 12582912, offset 6291456 12MiB 8.89M/s Size 13631488 13MiB 9.63M/s Size 13631488, offset 6815744 13MiB 10.1M/s bash-4.1# After a few runs, I modified the offset to be $i*512*1024 instead of $i/2*1024*1024, since bash can't handle fractions. I think the results are clear though -- Anything less than 4MB (other than short 1MB writes) is slower; 4MB offset by 2MB is slower than 4MB, and 8MB with a 4MB offset is the same speed as 8MB. Longer writes get faster, but 12MB, another multiple of 4, is the fastest. No doubt that I'm at 4MB What's my page size here -- 16KB or 32? i'm thinking 16, because there are times when 16KB was running at greater than half the speed of 32KB, but I'm not positive on this... I'm going to transfer my OS to the Kingston drive and get some better results for the Lexar drive later today. Thanks again for your time and help! -- Sent from my mobile device

15 years, 1 month

Lexar JumpDrive TwistTurn 4GB USB flashdrive

by Ajax Criterion

Hello! I'm relatively new to linux (been working with it for 7 or 8 months now), primarily using and contributing to the Porteus Linux community. Porteus is a distro that is optimized to run from a cd, USB flash drive, CF, SD, or other portable bootable media. As such, I'm trying to improve my knowledge of how flash devices work and how to best optimize them for use under linux (and, thus, it seems we may have some common goals). Arnd, your article at LWN as well as the information you've posted at linaro and to this mailing list has been a great help to me -- thank you for your time and efforts! I have three flash drives ( an 8GB Kingston DataTraveller DT101 G2, which doesn't seem to match up with the results you've already posted on the flash card survey for an 8GB DataTraveller, a 4GB Lexar JumpDrive TwistTurn, and an old 1GB USB1.1 unnamed drive that I received as a gift). I benched the Kingston and Lexar models yesterday, but somehow flashbench or one of the other commands I ran during the process wiped out the MBR and partition tables on both drives, and I've lost almost all of my data. The only thing I've been able to salvage so far is the results for the Lexar drive. I'll send along results for the others, and if I can figure out what I did to hose my drives I'll report on that as well (if you have any good recommendations for recovering data, I'm all ears! I've tried testdisk, dd_rescue, and scalpel without much luck --this could just be my lack of skill lol. Scalpel was able to get some text scattered around, which is how I got the Lexar results back). Ok, on to the results: ## Note -- this drive is 2-3 years old, give or take. bash-4.1# Bus 002 Device 004: ID 05dc:a764 Lexar Media, Inc. bash-4.1# fdisk -lu /dev/sdc Disk /dev/sdc: 4009 MB, 4009754624 bytes 128 heads, 16 sectors/track, 3824 cylinders, total 7831552 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x77ac9c58 Device Boot Start End Blocks Id System /dev/sdc1 * 49152 3637247 1794048 83 Linux /dev/sdc2 3637248 7831551 2097152 83 Linux bash-4.1# ## In an effort to improve performance without really knowing the erasesize of this drive, I started my partitions on 24MB intervals (least common denominator for all of the common allocation unit sizes on the flash card survey) and set my cylinder size to be one MB (I don't know if cylinder size, sectors/track, etc., really matters, since the FS block sizes don't match up to the page sizes anyway, but I thought it was worth a try). However, this didn't really help my performance very much. I should note that partition sdc1 was actually formatted as FAT32, and sdc2 was formatted as EXT4. bash-4.1# hdparm -I /dev/sdc /dev/sdc: SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ATA device, with non-removable media Standards: Likely used: 1 Configuration: Logical max current cylinders 0 0 heads 0 0 sectors/track 0 0 -- Logical/Physical Sector size: 512 bytes device size with M = 1024*1024: 0 MBytes device size with M = 1000*1000: 0 MBytes cache/buffer size = unknown Capabilities: IORDY not likely Cannot perform double-word IO R/W multiple sector transfer: not supported DMA: not supported PIO: pio0 bash-4.1# cat /proc/partitions 8 32 3915776 sdc 8 33 1794048 sdc1 8 34 2097152 sdc2 bash-4.1# ./flashbench -a /dev/sdc --blocksize=1024 --count=100 align 1073741824 pre 846Âµs on 867Âµs post 849Âµs diff 19.8Âµs align 536870912 pre 817Âµs on 866Âµs post 815Âµs diff 49.2Âµs align 268435456 pre 809Âµs on 855Âµs post 811Âµs diff 45.3Âµs align 134217728 pre 819Âµs on 856Âµs post 794Âµs diff 49.6Âµs align 67108864 pre 814Âµs on 857Âµs post 808Âµs diff 45.6Âµs align 33554432 pre 809Âµs on 857Âµs post 806Âµs diff 49.5Âµs align 16777216 pre 818Âµs on 862Âµs post 813Âµs diff 46.2Âµs align 8388608 pre 808Âµs on 861Âµs post 805Âµs diff 54.7Âµs align 4194304 pre 798Âµs on 857Âµs post 804Âµs diff 56.3Âµs align 2097152 pre 833Âµs on 862Âµs post 814Âµs diff 38.1Âµs align 1048576 pre 829Âµs on 881Âµs post 818Âµs diff 57Âµs align 524288 pre 829Âµs on 884Âµs post 826Âµs diff 56.2Âµs align 262144 pre 849Âµs on 886Âµs post 807Âµs diff 58.1Âµs align 131072 pre 849Âµs on 876Âµs post 832Âµs diff 35.8Âµs align 65536 pre 837Âµs on 884Âµs post 824Âµs diff 53.7Âµs align 32768 pre 824Âµs on 883Âµs post 831Âµs diff 55Âµs align 16384 pre 833Âµs on 881Âµs post 833Âµs diff 48.7Âµs align 8192 pre 832Âµs on 875Âµs post 820Âµs diff 48.6Âµs align 4096 pre 827Âµs on 880Âµs post 831Âµs diff 51.4Âµs align 2048 pre 833Âµs on 821Âµs post 831Âµs diff -11049n bash-4.1# ##I wasn't sure, but I assumed that this means I have a 4MB erase block -- my numbers were even more inconsistent before I added the count=100 option. I also made a number of scatter plots for this drive, with and without offsets to different locations on the drive, and it showed a straight line for 24+MB (whereas my kingston drive showed very clear jumps at 4MB intervals). bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdc --erasesize=$[4 * 1024 * 1024] --blocksize=1024 4MiB 6.62M/s 2MiB 7.08M/s 1MiB 7.05M/s 512KiB 7.05M/s 256KiB 7.09M/s 128KiB 7.1M/s 64KiB 7.1M/s 32KiB 7.03M/s 16KiB 6.92M/s 8KiB 6.64M/s 4KiB 2.79M/s 2KiB 1.29M/s 1KiB 620K/s bash-4.1# ./flashbench --open-au --open-au-nr=2 /dev/sdc --erasesize=$[4 * 1024 * 1024] --blocksize=1024 4MiB 7.42M/s 2MiB 7.4M/s 1MiB 7.34M/s 512KiB 6.19M/s 256KiB 7.36M/s 128KiB 7.34M/s 64KiB 7.35M/s 32KiB 7.28M/s 16KiB 7.13M/s 8KiB 6.83M/s 4KiB 2.8M/s 2KiB 1.28M/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=3 /dev/sdc --erasesize=$[4 * 1024 * 1024] --blocksize=1024 4MiB 6.48M/s 2MiB 5.46M/s 1MiB 7.4M/s 512KiB 7.39M/s 256KiB 7.34M/s 128KiB 7.35M/s 64KiB 7.34M/s 32KiB 7.26M/s 16KiB 7.11M/s 8KiB 6.83M/s 4KiB 2.81M/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=4 /dev/sdc --erasesize=$[4 * 1024 * 1024] --blocksize=1024 4MiB 6.8M/s 2MiB 5.8M/s 1MiB 7.32M/s 512KiB 5.83M/s 256KiB 7.36M/s 128KiB 7.33M/s 64KiB 7.34M/s 32KiB 7.26M/s 16KiB 7.12M/s 8KiB 6.8M/s 4KiB 2.8M/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=5 /dev/sdc --erasesize=$[4 * 1024 * 1024] --blocksize=1024 4MiB 6.95M/s 2MiB 6.06M/s 1MiB 7.34M/s 512KiB 4.22M/s 256KiB 1.45M/s 128KiB 675K/s ^C --> 4 open linear AU's? bash-4.1# ./flashbench --open-au --open-au-nr=4 /dev/sdc --erasesize=$[4 * 1024 * 1024] --blocksize=1024 --random 4MiB 6.86M/s 2MiB 5.81M/s 1MiB 7.33M/s 512KiB 3.39M/s 256KiB 1.39M/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdc --erasesize=$[4 * 1024 * 1024] --blocksize=1024 --random 4MiB 5.44M/s 2MiB 4.88M/s 1MiB 7.34M/s 512KiB 4.45M/s 256KiB 4.95M/s 128KiB 2.7M/s 64KiB 4.98M/s 32KiB 2.88M/s 16KiB 2.85M/s 8KiB 1.65M/s 4KiB 960K/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=2 /dev/sdc --erasesize=$[4 * 1024 * 1024] --blocksize=1024 --random 4MiB 4.79M/s 2MiB 5.99M/s 1MiB 5.44M/s 512KiB 4.41M/s 256KiB 1.53M/s 128KiB 941K/s 64KiB 540K/s ^C bash-4.1# --> only 1 open random AU? Or, I got the erasesize wrong, and there are two: bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdc --erasesize=$[2 * 1024 * 1024] --blocksize=1024 --random 2MiB 7.09M/s 1MiB 2.68M/s 512KiB 7.26M/s 256KiB 3.57M/s 128KiB 4.12M/s 64KiB 3.63M/s 32KiB 2.47M/s 16KiB 2.53M/s 8KiB 2.2M/s 4KiB 960K/s 2KiB 436K/s ^C^[[A bash-4.1# ./flashbench --open-au --open-au-nr=2 /dev/sdc --erasesize=$[2 * 1024 * 1024] --blocksize=1024 --random 2MiB 5.1M/s 1MiB 7.42M/s 512KiB 4.85M/s 256KiB 4.37M/s 128KiB 2.86M/s 64KiB 6.73M/s 32KiB 2.81M/s 16KiB 2.21M/s 8KiB 1.98M/s 4KiB 866K/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=3 /dev/sdc --erasesize=$[2 * 1024 * 1024] --blocksize=1024 --random 2MiB 4.32M/s 1MiB 5.91M/s 512KiB 4.11M/s 256KiB 1.39M/s 128KiB 998K/s 64KiB 619K/s ^C bash-4.1# bash-4.1# ./flashbench --findfat --fat-nr=5 --erasesize=$[4 * 1024*1024] --random --blocksize=512 /dev/sdc 4MiB 3.8M/s 3.59M/s 7.41M/s 7.39M/s 7.37M/s 2MiB 3.54M/s 4.34M/s 5.48M/s 7.37M/s 7.4M/s 1MiB 3.54M/s 4.33M/s 5.5M/s 7.39M/s 7.41M/s 512KiB 4.24M/s 3.33M/s 3.36M/s 4.01M/s 4.44M/s 256KiB 4.24M/s 3.06M/s 2.7M/s 2.71M/s 2.71M/s 128KiB 3.78M/s 2.83M/s 2.72M/s 2.72M/s 2.72M/s 64KiB 2.96M/s 2.72M/s 2.4M/s 2.4M/s 2.4M/s 32KiB 3.23M/s 2.81M/s 2.67M/s 2.67M/s 2.67M/s 16KiB 2.57M/s 2.47M/s 2.47M/s 2.47M/s 2.46M/s 8KiB 1.67M/s 1.87M/s 1.87M/s 1.87M/s 1.87M/s 4KiB 1.03M/s 951K/s 882K/s 814K/s 816K/s 2KiB 464K/s 466K/s 436K/s 411K/s 411K/s ^C bash-4.1# ./flashbench --findfat --fat-nr=5 --erasesize=$[2 * 1024*1024] --random --blocksize=512 /dev/sdc 2MiB 4.25M/s 7.07M/s 3.07M/s 4.34M/s 7.39M/s 1MiB 7.11M/s 3.05M/s 3.05M/s 4.41M/s 7.38M/s 512KiB 4.27M/s 3.08M/s 3.03M/s 2.72M/s 3.64M/s 256KiB 4.17M/s 3.54M/s 3.54M/s 2.4M/s 2.39M/s 128KiB 2.95M/s 2.99M/s 2.97M/s 2.73M/s 2.74M/s 64KiB 4.12M/s 2.98M/s 2.98M/s 2.29M/s 2.3M/s 32KiB 2.8M/s 2.21M/s 2.21M/s 2.53M/s 2.54M/s 16KiB 2.6M/s 2.06M/s 2.6M/s 2.58M/s 2.58M/s 8KiB 1.54M/s 1.81M/s 1.82M/s 1.81M/s 1.19M/s 4KiB 1.03M/s 940K/s 791K/s 969K/s 829K/s ^C bash-4.1# ./flashbench --findfat --fat-nr=5 --erasesize=$[1 * 1024*1024] --random --blocksize=512 /dev/sdc 1MiB 2.97M/s 3.05M/s 3.1M/s 3.08M/s 3.12M/s 512KiB 3.02M/s 7.04M/s 3.02M/s 3.02M/s 3.03M/s 256KiB 6.95M/s 3.02M/s 6.99M/s 6.93M/s 6.93M/s 128KiB 1.87M/s 2.97M/s 2.98M/s 1.87M/s 1.86M/s 64KiB 6.75M/s 6.79M/s 6.81M/s 2.89M/s 6.84M/s 32KiB 1.33M/s 2.81M/s 2.85M/s 2.83M/s 2.84M/s 16KiB 1.73M/s 2.61M/s 2.63M/s 1.72M/s 2.61M/s 8KiB 1.18M/s 2.23M/s 1.55M/s 2.23M/s 2.22M/s 4KiB 1.04M/s 1.04M/s 866K/s 1.04M/s 1.05M/s 2KiB 504K/s 459K/s 458K/s 504K/s 420K/s ^C bash-4.1# --> all very unclear to me. ##with the following, I'm trying some offsets to confirm the eraseblock size. I wasn't able to sort anything very useable out of this. bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdc --erasesize=$[4 * 1024 * 1024] --blocksize=1024 --random --offset=$[123*512] 4MiB 3.99M/s 2MiB 3.38M/s 1MiB 4.02M/s 512KiB 3.97M/s 256KiB 3.29M/s 128KiB 3.74M/s 64KiB 2.74M/s 32KiB 2.46M/s 16KiB 1.69M/s 8KiB 1.43M/s 4KiB 756K/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdc --erasesize=$[4 * 1024 * 1024] --blocksize=1024 --random --offset=$[28*1024*1024] 4MiB 5.48M/s 2MiB 7.44M/s 1MiB 7.42M/s 512KiB 3.67M/s 256KiB 4.82M/s 128KiB 2.71M/s 64KiB 5M/s 32KiB 2.89M/s 16KiB 2.86M/s 8KiB 1.66M/s 4KiB 964K/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdc --erasesize=$[4 * 1024 * 1024] --blocksize=1024 --random --offset=$[29*1024*1024] 4MiB 3.76M/s 2MiB 5.46M/s 1MiB 7.36M/s 512KiB 4.86M/s 256KiB 4.82M/s 128KiB 2.71M/s 64KiB 5M/s 32KiB 2.89M/s 16KiB 2.51M/s 8KiB 1.66M/s 4KiB 963K/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdc --erasesize=$[4 * 1024 * 1024] --blocksize=1024 --random --offset=$[30*1024*1024] 4MiB 3.49M/s 2MiB 7.27M/s 1MiB 4.08M/s 512KiB 5.55M/s 256KiB 3.84M/s 128KiB 3.11M/s 64KiB 4.03M/s 32KiB 3.35M/s 16KiB 2.87M/s 8KiB 1.63M/s 4KiB 968K/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdc --erasesize=$[4 * 1024 * 1024] --blocksize=1024 --random --offset=$[57*512*1024] 4MiB 4.02M/s 2MiB 4.6M/s 1MiB 6.33M/s 512KiB 3.18M/s 256KiB 3.48M/s 128KiB 2.23M/s 64KiB 1.33M/s 32KiB 906K/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdc --erasesize=$[1 * 1024 * 1024] --blocksize=1024 --random --offset=$[57*512*1024] 1MiB 3.15M/s 512KiB 7.21M/s 256KiB 6.9M/s 128KiB 1.91M/s 64KiB 6.63M/s 32KiB 6.13M/s 16KiB 1.59M/s 8KiB 3.8M/s 4KiB 950K/s 2KiB 419K/s 1KiB 216K/s bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdc --erasesize=$[1 * 1024 * 1024] --blocksize=1024 --random --offset=$[61*512*1024] 1MiB 5.3M/s 512KiB 4.38M/s 256KiB 3.04M/s 128KiB 6.81M/s 64KiB 6.64M/s 32KiB 1.6M/s 16KiB 5.12M/s 8KiB 1.38M/s 4KiB 985K/s 2KiB 466K/s 1KiB 221K/s bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdc --erasesize=$[1 * 1024 * 1024] --blocksize=1024 --random --offset=$[123*256*1024] 1MiB 3.04M/s 512KiB 6.96M/s 256KiB 7.07M/s 128KiB 2.98M/s 64KiB 6.71M/s 32KiB 2.21M/s 16KiB 1.74M/s 8KiB 3.83M/s 4KiB 888K/s 2KiB 389K/s 1KiB 218K/s bash-4.1# If you have more tests you would like performed, I can do them, once I am either done recovering data or give up on it. I'm very perplexed by this drive, because it was very clear to see the 4MB units in the kingston drive, both with the flashbench -a test and on the scatter plot. I spent the last couple of weeks benchmarking this drive with a script that I wrote, to try out various filesystems that work best with the Porteus operating system. I ran a substantial amount of tests with it improperly aligned, and got only a slight improvement when I aligned it to start partitions on 24MB blocks, so I guess it's not surprising that the eraseblock boundaries are difficult to find! I am curious to know what kind of improvements you see (or expect to see) when a drive is in versus out of alignment (and I'll be benchmarking my kingston drive to test this out as well). This information will likely be of great interest to our community. If I can sort out and resolve the cause for my drives getting wasted, I'll also recommend the flashbench tool to other users, and collect their results for your flashcard survey. Thanks again! -Ahau

15 years, 1 month

Kingston 8GB Datatraveler DT101 G2

by Ajax Criterion

Hi again, I was able to recover *most* of the test results for my Kingston drive. I've stitched this together from several chunks that were recovered, so bits and pieces are missing throughout, but most of the info is here. Unfortunately, I wasn't able to retrieve the full ouput of the 'flashbench -a' test -- I suppose you can take my word that it has a 4MB erase size until I can run some more tests on this drive :) KINGSTON 8GB Datatraveler DT101 G2 bash-4.1# fdisk -lu /dev/sdb Disk /dev/sdb: 7998 MB, 7998537728 bytes 255 heads, 63 sectors/track, 972 cylinders, total 15622144 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xc3072e18 Device Boot Start End Blocks Id System /dev/sdb1 63 3148739 1574338+ b W95 FAT32 /dev/sdb2 * 3148740 15615179 6233220 83 Linux bash-4.1# ## FAT32 in the front, EXT2 in the back lsusb: Bus 002 Device 002: ID 0930:6545 Toshiba Corp. Kingston DataTraveler 102 Flash Drive / HEMA Flash Drive 2 GB / PNY Attache 4GB Stick bash-4.1# ./flashbench -a /dev/sdb --blocksize=1024 --count=32 align 2147483648 pre 617 <missing information> bash-4.1# ./flashbench -O --open-au-nr=1 /dev/sdb 4MiB 4.94M/s 2MiB 4.99M/s 1MiB 5.05M/s 512KiB 5.15M/s 256KiB 5.07M/s 128KiB 4.62M/s 64KiB 5.15M/s 32KiB 5.63M/s 16KiB 4.36M/s bash-4.1# ./flashbench -O --open-au-nr=2 /dev/sdb 4MiB 13.7M/s 2MiB 13.2M/s 1MiB 13.5M/s 512KiB 14M/s 256KiB 13.5M/s 128KiB 11.2M/s 64KiB 15.1M/s 32KiB 10.8M/s 16KiB 6.58M/s bash-4.1# ./flashbench -O --open-au-nr=3 /dev/sdb 4MiB 13.3M/s 2MiB 13.2M/s 1MiB 13.4M/s 512KiB 13.9M/s 256KiB 13.5M/s 128KiB 11.2M/s 64KiB 15.1M/s 32KiB 10.9M/s 16KiB 6.6M/s bash-4.1# ./flashbench -O --open-au-nr=4 /dev/sdb 4MiB 13.3M/s 2MiB 13.1M/s 1MiB 13.7M/s 512KiB 13.8M/s 256KiB 10.9M/s 128KiB 11.3M/s 64KiB 15.4M/s 32KiB 11.1M/s 16KiB 6.91M/s bash-4.1# ./flashbench -O --open-au-nr=5 /dev/sdb 4MiB 13.3M/s 2MiB 13M/s 1MiB 13.4M/s 512KiB 13.6M/s 256KiB 13.3M/s 128KiB 11.1M/s 64KiB 15M/s 32KiB 11M/s 16KiB 6.68M/s bash-4.1# ./flashbench -O --open-au-nr=6 /dev/sdb 4MiB 13.7M/s 2MiB 13.3M/s 1MiB 13.4M/s 512KiB 13.7M/s 256KiB 13.4M/s 128KiB 11.3M/s 64KiB 15.3M/s 32KiB 10.8M/s 16KiB 6.77M/s bash-4.1# ./flashbench -O --open-au-nr=8 /dev/sdb 4MiB 13.4M/s 2MiB 13.2M/s 1MiB 13.4M/s 512KiB 12.1M/s 256KiB 13.5M/s 128KiB 11.3M/s 64KiB 15M/s 32KiB 11M/s 16KiB 6.58M/s bash-4.1# ./flashbench -O --open-au-nr=10 /dev/sdb 4MiB 13.3M/s 2MiB 12.1M/s 1MiB 10.6M/s 512KiB 8.78M/s 256KiB 13.5M/s 128KiB 11.1M/s 64KiB 15M/s 32KiB 11M/s 16KiB 6.55M/s bash-4.1# ./flashbench -O --open-au-nr=1 /dev/sdb --random 4MiB 4.95M/s 2MiB 5.13M/s 1MiB 5.27M/s 512KiB 5.32M/s 256KiB 2.94M/s 128KiB 4.56M/s 64KiB 5.91M/s 32KiB 5.65M/s 16KiB 3.2M/s bash-4.1# ./flashbench -O --open-au-nr=2 /dev/sdb --random 4MiB 13.3M/s 2MiB 9.34M/s 1MiB 5.85M/s 512KiB 3.75M/s 256KiB 5.2M/s 128KiB 4.23M/s 64KiB 3.14M/s 32KiB 3.05M/s 16KiB 1.87M/s bash-4.1# ./flashbench -O --open-au-nr=3 /dev/sdb --random 4MiB 13.3M/s 2MiB 9.4M/s 1MiB 5.85M/s 512KiB 3.75M/s 256KiB 5.22M/s 128KiB 4.21M/s 64KiB 3.1M/s 32KiB 3.03M/s 16KiB 1.87M/s bash-4.1# ./flashbench -O --open-au-nr=1 /dev/sdb --random --blocksize=512 4MiB 13.4M/s 2MiB 9.25M/s 1MiB 5.89M/s 512KiB 3.79M/s 256KiB 5.54M/s 128KiB 4.64M/s 64KiB 3.61M/s 32KiB 4.18M/s 16KiB 2.84M/s 8KiB 1.34M/s 4KiB 843K/s 2KiB 386K/s 1KiB 188K/s 512B 102K/s bash-4.1# s 32KiB 10.9M/s bash-4.1# ./flashbench /dev/sdb --blocksize=32768 --open-au --open-au-nr=6 --erasesize=8388608 8MiB 13.4M/s 4MiB 13.4M/s 2MiB 13.1M/s 1MiB 12.5M/s 512KiB 13.6M/s 256KiB 13.5M/s 128KiB 11.1M/s 64KiB 15M/s 32KiB 11M/s bash-4.1# -blocksize=4096 4MiB 4.96M/s 2MiB 5.01M/s 1MiB 5.04M/s 512KiB 5.16M/s 256KiB 5.06M/s 128KiB 4.61M/s 64KiB 5.16M/s 32KiB 5.64M/s 16KiB 4.37M/s 8KiB 2.02M/s 4KiB 1.52M/s bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdb --erasesize=$[4 * 1024 * 1024] --blocksize=8192 4MiB 13.2M/s 2MiB 13.2M/s 1MiB 13.5M/s 512KiB 13.8M/s 256KiB 14.5M/s 128KiB 11.2M/s 64KiB 16.1M/s 32KiB 11.9M/s 16KiB 7.34M/s 8KiB 2.96M/s bash-4.1# ./flashbench --open-au --open-au-nr=2 /dev/sdb --erasesize=$[4 * 1024 * 1024] --blocksize=8192 4MiB 13.7M/s 2MiB 13.2M/s 1MiB 13.5M/s 512KiB 13.6M/s 256KiB 13.6M/s 128KiB 11.2M/s 64KiB 15.2M/s 32KiB 10.9M/s 16KiB 6.62M/s 8KiB 2.91M/s bash-4.1# ./flashbench --open-au --open-au-nr=3 /dev/sdb --erasesize=$[4 * 1024 * 1024] --blocksize=8192 4MiB 13.4M/s 2MiB 13.2M/s 1MiB 13.4M/s 512KiB 14.2M/s 256KiB 13.5M/s 128KiB 11.4M/s 64KiB 15.4M/s 32KiB 10.9M/s 16KiB 6.6M/s 8KiB 2.85M/s bash-4.1# ./flashbench --open-au --open-au-nr=4 /dev/sdb --erasesize=$[4 * 1024 * 1024] --blocksize=8192 4MiB 13.3M/s 2MiB 13.4M/s 1MiB 13.4M/s 512KiB 13.6M/s 256KiB 10.9M/s 128KiB 11.3M/s 64KiB 15M/s 32KiB 10.8M/s 16KiB 6.57M/s 8KiB 2.83M/s bash-4.1# ./flashbench --open-au --open-au-nr=5 /dev/sdb --erasesize=$[4 * 1024 * 1024] --blocksize=8192 4MiB 13.5M/s 2MiB 13.3M/s 1MiB 13.6M/s 512KiB 13.6M/s 256KiB 13.5M/s 128KiB 11.1M/s 64KiB 15.1M/s 32KiB 10.9M/s 16KiB 6.84M/s 8KiB 2.84M/s bash-4.1# ./flashbench --open-au --open-au-nr=5 /dev/sdb --erasesize=$[4 * 1024 * 1024] 4MiB 13.6M/s 2MiB 13.2M/s 1MiB 13.4M/s 512KiB 13.6M/s 256KiB 13.5M/s 128KiB 11.3M/s 64KiB 15.1M/s 32KiB 10.8M/s 16KiB 6.82M/s bash-4.1# ./flashbench --open-au --open-au-nr=5 /dev/sdb --erasesize=$[4 * 1024 * 1024] --blocksize=2048 4MiB 13.4M/s 2MiB 13.2M/s 1MiB 11.3M/s 512KiB 13.5M/s 256KiB 13.5M/s 128KiB 11.2M/s 64KiB 15.1M/s 32KiB 10.8M/s 16KiB 6.58M/s 8KiB 2.82M/s 4KiB 1.44M/s 2KiB 744K/s bash-4.1# ./flashbench --open-au --open-au-nr=4 /dev/sdb --erasesize=$[4 * 1024 * 1024] --blocksize=2048 4MiB 13.4M/s 2MiB 13.2M/s 1MiB 13.6M/s 512KiB 13.5M/s 256KiB 13.5M/s 128KiB 11.2M/s 64KiB 15M/s 32KiB 10.9M/s 16KiB 6.56M/s 8KiB 2.85M/s 4KiB 1.45M/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=3 /dev/sdb --erasesize=$[4 * 1024 * 1024] --blocksize=2048 4MiB 5.12M/s 2MiB 4.94M/s 1MiB 5.02M/s 512KiB 5.08M/s 256KiB 4.77M/s 128KiB 4.19M/s 64KiB 4.38M/s 32KiB 3.44M/s 16KiB 2.45M/s 8KiB 1.77M/s 4KiB 1.45M/s 2KiB 750K/s bash-4.1# ./flashbench --open-au --open-au-nr=2 /dev/sdb --erasesize=$[4 * 1024 * 1024] --blocksize=2048 4MiB 13.7M/s 2MiB 13.1M/s 1MiB 13.5M/s 512KiB 13.7M/s 256KiB 13.5M/s 128KiB 11.2M/s 64KiB 15.2M/s 32KiB 11.9M/s 16KiB 6.61M/s 8KiB 2.83M/s 4KiB 1.44M/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdb --erasesize=$[4 * 1024 * 1024] --blocksize=2048 4MiB 5.51M/s 2MiB 5.11M/s 1MiB 5.16M/s 512KiB 5.15M/s 256KiB 5.09M/s 128KiB 4.47M/s 64KiB 16.1M/s 32KiB 11.8M/s 16KiB 7.3M/s 8KiB 3.07M/s 4KiB 1.54M/s 2KiB 813K/s bash-4.1# bash-4.1# ./flashbench --open-au --open-au-nr=1 /dev/sdb --erasesize=$[4 * 1024 * 1024] --blocksize=2048 --random 4MiB 13.3M/s 2MiB 9.25M/s 1MiB 5.87M/s 512KiB 3.77M/s 256KiB 5.5M/s 128KiB 4.62M/s 64KiB 3.6M/s 32KiB 4.18M/s 16KiB 2.84M/s 8KiB 1.33M/s 4KiB 840K/s 2KiB 384K/s bash-4.1# ./flashbench --open-au --open-au-nr=2 /dev/sdb --erasesize=$[4 * 1024 * 1024] --blocksize=2048 --random 4MiB 7.8M/s 2MiB 6.77M/s 1MiB 5.83M/s 512KiB 3.74M/s 256KiB 5.22M/s 128KiB 4.21M/s 64KiB 3.09M/s 32KiB 3.04M/s 16KiB 1.87M/s 8KiB 900K/s 4KiB 521K/s ^C bash-4.1# ./flashbench --open-au --open-au-nr=3 /dev/sdb --erasesize=$[4 * 1024 * 1024] --blocksize=2048 --random 4MiB 13.3M/s 2MiB 7.64M/s 1MiB 5.83M/s 512KiB 3.74M/s 256KiB 5.18M/s 128KiB 4.2M/s 64KiB 3.1M/s 32KiB 3.04M/s 16KiB 1.86M/s 8KiB 901K/s 4KiB 520K/s ^C bash-4.1# bash-4.1# ./flashbench --findfat --fat-nr=5 --erasesize=$[4 * 1024*1024] --random --blocksize=512 /dev/sdb 4MiB 3.37M/s 5.42M/s 13.3M/s 13.4M/s 13.3M/s 2MiB 5.11M/s 5.04M/s 9.25M/s 9.17M/s 9.25M/s 1MiB 5.24M/s 5.86M/s 5.86M/s 5.85M/s 5.86M/s 512KiB 5.29M/s 3.77M/s 3.77M/s 3.76M/s 3.77M/s 256KiB 2.92M/s 5.48M/s 5.49M/s 5.49M/s 5.48M/s 128KiB 4.49M/s 4.61M/s 4.6M/s 4.6M/s 4.6M/s 64KiB 5.86M/s 3.59M/s 3.59M/s 3.59M/s 3.6M/s 32KiB 5.62M/s 4.16M/s 4.17M/s 4.17M/s 4.16M/s 16KiB 4.1M/s 2.82M/s 2.82M/s 2.82M/s 2.81M/s 8KiB 1.35M/s 1.33M/s 1.33M/s 1.33M/s 1.33M/s 4KiB 706K/s 836K/s 837K/s 836K/s 837K/s ^C bash-4.1# ./flashbench --findfat --fat-nr=5 --erasesize=$[4 * 1024*1024] --blocksize=512 /dev/sdb 4MiB 4.94M/s 13.4M/s 13.3M/s 13.3M/s 13.3M/s 2MiB 4.98M/s 13.2M/s 13.2M/s 13.2M/s 13.2M/s 1MiB 5.05M/s 13.5M/s 13.4M/s 13.5M/s 14.3M/s 512KiB 5.15M/s 13.7M/s 13.7M/s 13.8M/s 13.7M/s 256KiB 5.07M/s 13.7M/s 13.7M/s 13.8M/s 13.7M/s 128KiB 4.63M/s 11.1M/s 11.1M/s 11.2M/s 11M/s 64KiB 5.17M/s 16.1M/s 16.1M/s 16M/s 16M/s 32KiB 5.65M/s 11.9M/s 11.9M/s 11.9M/s 11.9M/s 16KiB 4.32M/s 7.33M/s 7.35M/s 7.35M/s 7.37M/s 8KiB 2.02M/s 2.95M/s 2.96M/s 2.95M/s 2.94M/s 4KiB 1.54M/s 1.54M/s 1.55M/s 1.54M/s 1.55M/s 2KiB 769K/s 812K/s 813K/s 815K/s 811K/s 1KiB 417K/s 407K/s 418K/s 418K/s 418K/s ^C bash-4.1# Again, if there are more tests you'd like to have done, just let me know and I can run them when I have a chance. I think I've rescued about as much as I can from the drive, so I should have it operational again soon :)

15 years, 1 month

SanDisk microSDHC class 4, 4 GB (for cameras)

by Peter Warasin

****************************************************** **** SanDisk microSDHC class 4, 4 GB (for cameras)**** ****************************************************** ==> /sys/block/mmcblk0/device/cid <== 0353445355303447800a58d43d00aa00 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900001d8a7f800a404000 ==> /sys/block/mmcblk0/device/scr <== 0235800100000000 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x8 ==> /sys/block/mmcblk0/device/cid <== 0353445355303447800a58d43d00aa00 ==> /sys/block/mmcblk0/device/manfid <== 0x000003 ==> /sys/block/mmcblk0/device/oemid <== 0x5344 ==> /sys/block/mmcblk0/device/serial <== 0x0a58d43d ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/name <== SU04G ==> /sys/block/mmcblk0/device/date <== 10/2010 clock: 25000000 Hz vdd: 20 (3.2 ~ 3.3 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 2 (4 bits) timing spec: 0 (legacy) fdisk -ul /dev/sda Disk /dev/sda: 3965 MB, 3965190144 bytes 128 heads, 32 sectors/track, 1890 cylinders, total 7744512 sectors Units = sectors of 1 * 512 = 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 614399 307199+ 83 Linux /dev/sda2 614400 819199 102400 83 Linux /dev/sda3 819200 1851391 516096 82 Linux swap / Solaris /dev/sda4 1851392 7364607 2756608 83 Linux $ ./flashbench -a /dev/sda3 --count=100 align 134217728 pre 2.62ms on 2.61ms post 2.57ms diff 20.6µs align 67108864 pre 2.61ms on 2.61ms post 2.57ms diff 20.3µs align 33554432 pre 2.75ms on 2.78ms post 2.59ms diff 113µs align 16777216 pre 2.54ms on 2.6ms post 2.47ms diff 91.4µs align 8388608 pre 2.61ms on 2.6ms post 2.41ms diff 93.6µs align 4194304 pre 2.61ms on 2.61ms post 2.6ms diff -1301ns align 2097152 pre 2.61ms on 2.61ms post 2.61ms diff -115ns align 1048576 pre 2.61ms on 2.61ms post 2.61ms diff 5.14µs align 524288 pre 2.61ms on 2.61ms post 2.61ms diff 2.06µs align 262144 pre 2.61ms on 2.61ms post 2.61ms diff 4.23µs align 131072 pre 2.61ms on 2.61ms post 2.61ms diff 3.11µs align 65536 pre 2.62ms on 2.62ms post 2.62ms diff 945ns align 32768 pre 2.68ms on 2.67ms post 2.7ms diff -18986n -> 8MiB (??) $ ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 --erasesize=$[1024*1024*16] 16MiB 4.31M/s 8MiB 4.25M/s 4MiB 4.44M/s 2MiB 4.44M/s 1MiB 4.51M/s 512KiB 4.41M/s 256KiB 4.19M/s 128KiB 4.16M/s 64KiB 8.05M/s 32KiB 4.69M/s 16KiB 2.25M/s 8KiB 2.22M/s 4KiB 1.41M/s 2KiB 851K/s $ ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 --erasesize=$[1024*1024*8] 8MiB 3.21M/s 4MiB 3.21M/s 2MiB 3.86M/s 1MiB 6.5M/s 512KiB 7.43M/s 256KiB 6.87M/s 128KiB 7.68M/s 64KiB 10M/s 32KiB 8.38M/s 16KiB 3.05M/s 8KiB 2.82M/s 4KiB 1.74M/s 2KiB 980K/s ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 --erasesize=$[1024*1024*1] 1MiB 6.96M/s 512KiB 7.67M/s 256KiB 7.01M/s 128KiB 7.76M/s 64KiB 10M/s 32KiB 7.65M/s 16KiB 3.07M/s 8KiB 2.94M/s 4KiB 1.71M/s 2KiB 997K/s $ ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 --erasesize=$[1024*1024*4] 4MiB 7.26M/s 2MiB 7.14M/s 1MiB 7.67M/s 512KiB 7.45M/s 256KiB 6.85M/s 128KiB 7.88M/s 64KiB 10M/s 32KiB 8.38M/s 16KiB 3.02M/s 8KiB 2.86M/s 4KiB 1.74M/s 2KiB 956K/s -> ok, so it's more likely 4MiB ? $ ./flashbench /dev/sda3 --open-au-nr=2 -O --blocksize=2048 --erasesize=$[1024*1024*4] 4MiB 5.55M/s 2MiB 7.32M/s 1MiB 7.73M/s 512KiB 7.44M/s 256KiB 6.87M/s 128KiB 7.75M/s 64KiB 9.25M/s 32KiB 8.42M/s 16KiB 3.02M/s 8KiB 2.84M/s 4KiB 1.73M/s 2KiB 972K/s $ ./flashbench /dev/sda3 --open-au-nr=5 -O --blocksize=2048 --erasesize=$[1024*1024*4] 4MiB 4.92M/s 2MiB 2.99M/s 1MiB 2.07M/s 512KiB 2.33M/s 256KiB 2.05M/s 128KiB 2.08M/s 64KiB 2.48M/s 32KiB 3.08M/s 16KiB 1.61M/s 8KiB 1.99M/s 4KiB 1.28M/s 2KiB 797K/s $ ./flashbench /dev/sda3 --open-au-nr=6 -O --blocksize=2048 --erasesize=$[1024*1024*4] 4MiB 3.91M/s 2MiB 2.73M/s 1MiB 1.65M/s 512KiB 1.45M/s 256KiB 1.4M/s 128KiB 1.49M/s 64KiB 385K/s 32KiB 2.46M/s 16KiB 1.53M/s 8KiB 1.66M/s 4KiB 1.13M/s 2KiB 705K/s $ ./flashbench /dev/sda3 --open-au-nr=7 -O --blocksize=2048 --erasesize=$[1024*1024*4] 4MiB 3.75M/s 2MiB 2.72M/s 1MiB 1.43M/s 512KiB 1.23M/s 256KiB 1.19M/s 128KiB 1.26M/s 64KiB 1.78M/s 32KiB 1.65M/s 16KiB 1.41M/s 8KiB 1.31M/s 4KiB 1.11M/s 2KiB 689K/s $ ./flashbench /dev/sda3 --open-au-nr=10 -O --blocksize=2048 --erasesize=$[1024*1024*4] 4MiB 4.25M/s 2MiB 2.98M/s 1MiB 1.26M/s 512KiB 939K/s 256KiB 902K/s 128KiB 816K/s 64KiB 306K/s 32KiB 1.12M/s 16KiB 676K/s 8KiB 503K/s ^C $ ./flashbench /dev/sda3 --open-au-nr=9 -O --blocksize=2048 --erasesize=$[1024*1024*4] 4MiB 3.16M/s 2MiB 3.02M/s 1MiB 1.26M/s 512KiB 996K/s 256KiB 971K/s ^C -> ok, would say, it's 7 blocks ./flashbench /dev/sda3 --open-au-nr=7 -O --blocksize=2048 --erasesize=$[1024*1024*4] --random 4MiB 3.52M/s 2MiB 2.93M/s 1MiB 1.38M/s 512KiB 843K/s 256KiB 474K/s ^C ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 --erasesize=$[1024*1024*4] --random 4MiB 7.25M/s 2MiB 7.38M/s 1MiB 7.67M/s 512KiB 2.44M/s 256KiB 1.13M/s 128KiB 2.06M/s 64KiB 1.2M/s 32KiB 597K/s 16KiB 301K/s 8KiB 1.32M/s 4KiB 801K/s 2KiB 439K/s -> ok, would say this card is not for random access ./flashbench /dev/sda -f --random --erasesize=$[4*1024*1024] --fat-nr=12 4MiB 3.74M/s 4.09M/s 3.37M/s 4.5M/s 4.1M/s 4.63M/s 4.63M/s 4.55M/s 4.63M/s 4.63M/s 4.69M/s 4.58M/s 2MiB 4.32M/s 4.99M/s 4.2M/s 4.14M/s 3.93M/s 4.27M/s 4.32M/s 4.32M/s 4.32M/s 4.32M/s 4.32M/s 4.3M/s 1MiB 4.34M/s 4.69M/s 4.09M/s 4.13M/s 3.86M/s 4.27M/s 4.27M/s 4.27M/s 4.28M/s 4.25M/s 4.27M/s 4.25M/s 512KiB 4.19M/s 4.33M/s 3.87M/s 3.95M/s 3.84M/s 3.94M/s 3.97M/s 3.83M/s 3.95M/s 3.95M/s 3.95M/s 3.95M/s 256KiB 1.63M/s 1.77M/s 1.55M/s 1.53M/s 1.52M/s 1.53M/s 1.53M/s 1.52M/s 1.53M/s 1.52M/s 1.52M/s 1.53M/s 128KiB 1.95M/s 2.25M/s 1.86M/s 2.13M/s 2.04M/s 2.14M/s 2.17M/s 2.17M/s 2.15M/s 2.17M/s 2.16M/s 2.16M/s 64KiB 1.21M/s 1.39M/s 1.16M/s 1.14M/s 1.14M/s 1.13M/s 1.14M/s 1.13M/s 1.14M/s 1.13M/s 1.13M/s 1.14M/s 32KiB 585K/s 738K/s 560K/s 582K/s 598K/s 589K/s 588K/s 588K/s 589K/s 588K/s 589K/s 589K/s 16KiB 301K/s 372K/s 294K/s 301K/s 302K/s 300K/s 300K/s 300K/s 300K/s 300K/s 300K/s 300K/s -- :: e n d i a n :: open source - open minds :: peter warasin :: http://www.endian.com :: peter(a)endian.com

15 years, 1 month

SanDisk microSDHC class 4, 16 GB (for mobile phones)

by Peter Warasin

************************************************************** **** SanDisk microSDHC class 4, 16 GB (for mobile phones) **** ************************************************************** ==> /sys/block/mmcblk0/device/cid <== 0353445355313647807166662100b600 ==> /sys/block/mmcblk0/device/csd <== 400e00325b59000076b27f800a404000 ==> /sys/block/mmcblk0/device/scr <== 0235800100000000 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x8 ==> /sys/block/mmcblk0/device/cid <== 0353445355313647807166662100b600 ==> /sys/block/mmcblk0/device/manfid <== 0x000003 ==> /sys/block/mmcblk0/device/oemid <== 0x5344 ==> /sys/block/mmcblk0/device/serial <== 0x71666621 ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/name <== SU16G ==> /sys/block/mmcblk0/device/date <== 06/2011 clock: 33000000 Hz vdd: 20 (3.2 ~ 3.3 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 2 (4 bits) timing spec: 2 (sd high-speed) fdisk -ul /dev/sda Disk /dev/sda: 15.9 GB, 15931539456 bytes 255 heads, 63 sectors/track, 1936 cylinders, total 31116288 sectors Units = sectors of 1 * 512 = 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 8192 31116287 15554048 c W95 FAT32 (LBA) ./flashbench -a /dev/sda3 --count=100 align 134217728 pre 2.07ms on 2.59ms post 1.75ms diff 681µs align 67108864 pre 2.08ms on 2.59ms post 1.79ms diff 660µs align 33554432 pre 2.09ms on 2.6ms post 1.81ms diff 647µs align 16777216 pre 2.09ms on 2.6ms post 1.81ms diff 654µs align 8388608 pre 2.09ms on 2.6ms post 1.82ms diff 647µs align 4194304 pre 2.06ms on 2.34ms post 1.83ms diff 391µs align 2097152 pre 1.84ms on 1.83ms post 1.83ms diff -3859ns align 1048576 pre 1.84ms on 1.82ms post 1.86ms diff -24890n align 524288 pre 1.84ms on 1.85ms post 1.85ms diff 2.91µs align 262144 pre 1.85ms on 1.85ms post 1.86ms diff 1.72µs align 131072 pre 1.83ms on 1.83ms post 1.82ms diff 3.73µs align 65536 pre 1.85ms on 1.84ms post 1.85ms diff -10755n align 32768 pre 1.82ms on 1.84ms post 1.84ms diff 8.97µs ./flashbench /dev/sda3 -O --open-au-nr=1 --erasesize=$[1024*1024*4] 4MiB 15.3M/s 2MiB 16M/s 1MiB 16.4M/s 512KiB 16.2M/s 256KiB 15.4M/s 128KiB 13.5M/s 64KiB 17.3M/s 32KiB 13.8M/s 16KiB 8.49M/s ./flashbench /dev/sda3 -O --open-au-nr=5 --erasesize=$[1024*1024*4] 4MiB 4.28M/s 2MiB 3.13M/s 1MiB 3.43M/s 512KiB 3.5M/s 256KiB 3.25M/s 128KiB 3.31M/s 64KiB 4.45M/s 32KiB 6.13M/s 16KiB 4.36M/s ./flashbench /dev/sda3 -O --open-au-nr=10 --erasesize=$[1024*1024*4] 4MiB 4M/s 2MiB 2.39M/s 1MiB 1.55M/s 512KiB 1.15M/s 256KiB 1.18M/s 128KiB 1.14M/s 64KiB 1.44M/s 32KiB 2.19M/s 16KiB 1.49M/s ./flashbench /dev/sda3 -O --open-au-nr=11 --erasesize=$[1024*1024*4] --blocksize=4096 4MiB 2.92M/s 2MiB 2.33M/s 1MiB 1.52M/s 512KiB 1.06M/s 256KiB 926K/s 128KiB 906K/s 64KiB 1.1M/s 32KiB 1.34M/s 16KiB 1.35M/s 8KiB 215K/s 4KiB 170K/s -> 10 blocks ./flashbench /dev/sda3 -O --open-au-nr=10 --erasesize=$[1024*1024*4] --blocksize=4096 --random 4MiB 3.76M/s 2MiB 2.27M/s 1MiB 1.6M/s 512KiB 967K/s 256KiB 508K/s 128KiB 256K/s 64KiB 151K/s 32KiB 84.3K/s 16KiB 46.4K/s 8KiB 456K/s 4KiB 875K/s ./flashbench /dev/sda3 -O --open-au-nr=5 --erasesize=$[1024*1024*4] --blocksize=4096 --random 4MiB 3.62M/s 2MiB 4.32M/s 1MiB 2.9M/s 512KiB 2.19M/s 256KiB 1.44M/s 128KiB 801K/s 64KiB 456K/s 32KiB 255K/s 16KiB 187K/s 8KiB 794K/s 4KiB 1.1M/s -> looks like bad random access but optimized for 4KiB blocks ./flashbench /dev/sda -f --erasesize=$[1024*1024*4] --blocksize=$[1024*4] --random --fat-nr=20 4MiB 1.83M/s 14.1M/s 2.32M/s 4.57M/s 4.48M/s 4.5M/s 4.49M/s 4.53M/s 4.49M/s 4.5M/s 4.44M/s 4.43M/s 4.49M/s 4.51M/s 4.49M/s 4.51M/s 4.51M/s 4.52M/s 4.45M/s 4.49M/s 2MiB 3.24M/s 12.7M/s 3.83M/s 4.62M/s 4.57M/s 2.12M/s 4.54M/s 4.58M/s 4.52M/s 4.57M/s 4.55M/s 4.56M/s 4.54M/s 4.54M/s 4.55M/s 4.55M/s 4.55M/s 4.57M/s 4.54M/s 4.46M/s 1MiB 4.53M/s 13.9M/s 4.42M/s 4.56M/s 4.56M/s 2.13M/s 4.58M/s 4.55M/s 4.56M/s 4.55M/s 4.56M/s 4.54M/s 4.6M/s 4.56M/s 4.59M/s 4.56M/s 4.58M/s 4.54M/s 4.51M/s 4.53M/s 512KiB 4.48M/s 10.8M/s 4.42M/s 4.45M/s 3.79M/s 1.94M/s 3.77M/s 3.85M/s 3.81M/s 3.78M/s 3.83M/s 3.81M/s 3.79M/s 3.81M/s 3.82M/s 3.87M/s 3.81M/s 3.86M/s 3.79M/s 3.84M/s 256KiB 3.57M/s 10.7M/s 3.56M/s 3.61M/s 3.38M/s 1.85M/s 3.43M/s 3.44M/s 3.39M/s 3.44M/s 3.42M/s 3.39M/s 3.43M/s 3.46M/s 3.4M/s 3.43M/s 3.4M/s 3.45M/s 3.42M/s 3.45M/s 128KiB 2.23M/s 10.3M/s 2.25M/s 2.28M/s 2.24M/s 1.43M/s 2.24M/s 2.26M/s 2.25M/s 2.25M/s 2.24M/s 2.24M/s 2.24M/s 2.26M/s 2.24M/s 2.26M/s 2.25M/s 2.26M/s 2.25M/s 2.26M/s 64KiB 1.38M/s 10.1M/s 1.38M/s 1.4M/s 1.32M/s 990K/s 1.32M/s 1.33M/s 1.31M/s 1.33M/s 1.31M/s 1.33M/s 1.33M/s 1.33M/s 1.32M/s 1.33M/s 1.32M/s 1.33M/s 1.31M/s 1.32M/s 32KiB 720K/s 7.74M/s 720K/s 729K/s 714K/s 610K/s 719K/s 726K/s 715K/s 726K/s 718K/s 725K/s 718K/s 725K/s 716K/s 724K/s 717K/s 727K/s 716K/s 725K/s 16KiB 344K/s 3.9M/s 345K/s 349K/s 344K/s 320K/s 344K/s 348K/s 343K/s 348K/s 344K/s 348K/s 341K/s 348K/s 344K/s 348K/s 343K/s 348K/s 343K/s 348K/s 8KiB 1.19M/s 2.13M/s 1.15M/s 1.21M/s 1.24M/s 948K/s 1.24M/s 1.24M/s 1.24M/s 1.24M/s 1.23M/s 1.25M/s 1.24M/s 1.26M/s 1.19M/s 1.24M/s 1.23M/s 1.25M/s 1.22M/s 1.22M/s -> ok, FAT is at 8MiB as expected (?) -- :: e n d i a n :: open source - open minds :: peter warasin :: http://www.endian.com :: peter(a)endian.com

15 years, 1 month

Apacer microSDHC mobile series class 2, 16GB

by Peter Warasin

hi how stable is this card? is it a scsi harddisk? ;) ok, random is not that good ****************************************************** **** Apacer microSDHC mobile series class 2, 16GB **** ****************************************************** ==> /sys/block/mmcblk0/device/cid <== 03534453553136478070387aa500a200 ==> /sys/block/mmcblk0/device/csd <== 400e00325b59000076b27f800a404000 ==> /sys/block/mmcblk0/device/scr <== 0235800000000000 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x8 ==> /sys/block/mmcblk0/device/cid <== 03534453553136478070387aa500a200 ==> /sys/block/mmcblk0/device/manfid <== 0x000003 ==> /sys/block/mmcblk0/device/oemid <== 0x5344 ==> /sys/block/mmcblk0/device/serial <== 0x70387aa5 ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/name <== SU16G ==> /sys/block/mmcblk0/device/date <== 02/2010 clock: 33000000 Hz vdd: 20 (3.2 ~ 3.3 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 2 (4 bits) timing spec: 2 (sd high-speed) $ fdisk -lu /dev/sda Disk /dev/sda: 15.9 GB, 15931539456 bytes 128 heads, 32 sectors/track, 7596 cylinders, total 31116288 sectors Units = sectors of 1 * 512 = 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 614399 307199+ 83 Linux /dev/sda2 614400 819199 102400 83 Linux /dev/sda3 819200 1851391 516096 82 Linux swap / Solaris /dev/sda4 1851392 7364607 2756608 83 Linux $ ./flashbench -a /dev/sda3 --count=100 --blocksize=2048 align 134217728 pre 740µs on 740µs post 741µs diff -643ns align 67108864 pre 736µs on 737µs post 736µs diff 1.03µs align 33554432 pre 738µs on 742µs post 740µs diff 3.61µs align 16777216 pre 827µs on 816µs post 738µs diff 33.7µs align 8388608 pre 789µs on 810µs post 775µs diff 28.5µs align 4194304 pre 737µs on 738µs post 738µs diff 24ns align 2097152 pre 736µs on 737µs post 739µs diff -234ns align 1048576 pre 736µs on 734µs post 734µs diff -1177ns align 524288 pre 735µs on 735µs post 737µs diff -1214ns align 262144 pre 739µs on 735µs post 731µs diff -224ns align 131072 pre 737µs on 737µs post 738µs diff -650ns align 65536 pre 738µs on 736µs post 736µs diff -689ns align 32768 pre 735µs on 738µs post 732µs diff 4.52µs align 16384 pre 737µs on 738µs post 737µs diff 534ns align 8192 pre 736µs on 737µs post 736µs diff 1.38µs align 4096 pre 738µs on 732µs post 735µs diff -4358ns -> aeh? $ ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 --erasesize=$[8*1024*1024] 8MiB 1.48M/s 4MiB 3.23M/s 2MiB 3.63M/s 1MiB 3.69M/s 512KiB 3.65M/s 256KiB 3.62M/s 128KiB 3.5M/s 64KiB 3.87M/s 32KiB 3.44M/s 16KiB 3.1M/s 8KiB 2.15M/s 4KiB 1.4M/s 2KiB 813K/s $ ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 --erasesize=$[8*1024*1024] 8MiB 3.65M/s 4MiB 3.63M/s 2MiB 3.67M/s 1MiB 3.7M/s 512KiB 3.69M/s 256KiB 3.64M/s 128KiB 3.51M/s 64KiB 3.88M/s 32KiB 3.45M/s 16KiB 3.12M/s 8KiB 2.17M/s 4KiB 1.41M/s 2KiB 805K/s $ ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 --erasesize=$[8*1024*1024] 8MiB 3.73M/s 4MiB 3.67M/s 2MiB 3.73M/s 1MiB 3.76M/s 512KiB 3.73M/s 256KiB 3.73M/s 128KiB 3.56M/s 64KiB 3.97M/s 32KiB 3.54M/s 16KiB 3.16M/s 8KiB 2.19M/s 4KiB 1.4M/s 2KiB 811K/s $ ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 --erasesize=$[16*1024*1024] 16MiB 4.75M/s 8MiB 5.48M/s 4MiB 5.44M/s 2MiB 5.38M/s 1MiB 5.48M/s 512KiB 5.38M/s 256KiB 5.36M/s 128KiB 5.02M/s 64KiB 5.97M/s 32KiB 4.93M/s 16KiB 4.32M/s 8KiB 2.6M/s 4KiB 1.62M/s 2KiB 905K/s $ ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 --erasesize=$[16*1024*1024] --offset=$[2*1024*1024] 16MiB 6.04M/s 8MiB 4.57M/s 4MiB 5.31M/s 2MiB 5.3M/s 1MiB 5.38M/s 512KiB 5.32M/s 256KiB 5.24M/s 128KiB 4.94M/s 64KiB 5.85M/s 32KiB 4.86M/s 16KiB 4.29M/s 8KiB 2.57M/s 4KiB 1.62M/s 2KiB 912K/s ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 --erasesize=$[16*1024*1024] --offset=$[512] 16MiB 5.13M/s 8MiB 5.4M/s 4MiB 5.41M/s 2MiB 5.33M/s 1MiB 5.47M/s 512KiB 5.39M/s 256KiB 5.28M/s 128KiB 4.83M/s 64KiB 6.39M/s 32KiB 4.44M/s 16KiB 3.45M/s 8KiB 1.96M/s 4KiB 1.35M/s 2KiB 823K/s $ ./flashbench /dev/sda3 --open-au-nr=2 -O --blocksize=2048 --erasesize=$[16*1024*1024] 16MiB 5.69M/s 8MiB 5.66M/s 4MiB 5.57M/s 2MiB 5.23M/s 1MiB 5.56M/s 512KiB 5.47M/s 256KiB 5.42M/s 128KiB 5.1M/s 64KiB 5.52M/s 32KiB 5.02M/s 16KiB 4.31M/s 8KiB 2.51M/s 4KiB 1.58M/s 2KiB 908K/s ./flashbench /dev/sda3 --open-au-nr=5 -O --blocksize=2048 --erasesize=$[16*1024*1024] 16MiB 5.94M/s 8MiB 4.92M/s 4MiB 4.33M/s 2MiB 4.54M/s 1MiB 5.98M/s 512KiB 5.95M/s 256KiB 5.94M/s 128KiB 5.53M/s 64KiB 5.92M/s 32KiB 5.42M/s 16KiB 4.65M/s 8KiB 2.67M/s 4KiB 1.67M/s 2KiB 917K/s $ ./flashbench /dev/sda3 --open-au-nr=10 -O --blocksize=2048 --erasesize=$[16*1024*1024] 16MiB 5.79M/s 8MiB 5.28M/s 4MiB 4.25M/s 2MiB 3.05M/s 1MiB 2.04M/s 512KiB 1.02M/s 256KiB 515K/s freezes ./flashbench /dev/sda3 --open-au-nr=6 -O --blocksize=2048 --erasesize=$[16*1024*1024] 16MiB 5.5M/s 8MiB 5.06M/s 4MiB 4.29M/s 2MiB 3.1M/s 1MiB 2.08M/s 512KiB 1.03M/s 256KiB 518K/s ^C -> at least 5 blocks ./flashbench /dev/sda3 --open-au-nr=5 -O --blocksize=2048 --erasesize=$[16*1024*1024] --random 16MiB 5.22M/s 8MiB 5.04M/s 4MiB 4.14M/s 2MiB 3.09M/s 1MiB 2.19M/s 512KiB 1.13M/s 256KiB 605K/s 128KiB 300K/s ^C ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 --erasesize=$[16*1024*1024] --random 16MiB 4.65M/s 8MiB 4.69M/s 4MiB 4.65M/s 2MiB 4.71M/s 1MiB 3.66M/s 512KiB 1.75M/s 256KiB 1.28M/s 128KiB 819K/s 64KiB 542K/s 32KiB 262K/s 16KiB 127K/s 8KiB 64.4K/s -> quite slow on small blocks -> assuming 8GiB erase-size (?) $ ./flashbench /dev/sda3 -f --erasesize=$[8*1024*1024] --blocksize=2048 8MiB 5.81M/s 6.2M/s 6.64M/s 6.8M/s 6.18M/s 4.83M/s 4MiB 5.77M/s 6.49M/s 6.39M/s 6.69M/s 6.51M/s 4.68M/s 2MiB 5.68M/s 6.45M/s 6.53M/s 6.52M/s 6.48M/s 4.8M/s 1MiB 5.9M/s 6.55M/s 6.61M/s 6.74M/s 6.6M/s 4.85M/s 512KiB 5.77M/s 6.55M/s 6.52M/s 6.58M/s 6.6M/s 4.81M/s 256KiB 5.72M/s 6.49M/s 6.46M/s 6.45M/s 6.52M/s 4.77M/s 128KiB 5.3M/s 6.04M/s 6M/s 5.97M/s 6M/s 4.51M/s 64KiB 6.51M/s 7.3M/s 7.37M/s 7.5M/s 7.37M/s 5.2M/s 32KiB 5.32M/s 5.98M/s 5.92M/s 5.9M/s 6M/s 4.45M/s 16KiB 4.54M/s 5.1M/s 5.04M/s 4.94M/s 5M/s 3.84M/s 8KiB 2.67M/s 2.8M/s 2.83M/s 2.84M/s 2.88M/s 2.48M/s 4KiB 1.67M/s 1.74M/s 1.73M/s 1.73M/s 1.74M/s 1.57M/s 2KiB 934K/s 956K/s 958K/s 953K/s 954K/s 884K/s peter -- :: e n d i a n :: open source - open minds :: peter warasin :: http://www.endian.com :: peter(a)endian.com

15 years, 1 month

Emtec microSDHC class 4, 4GB

by Peter Warasin

hi guys this card seems quite unqualified ************************************** **** Emtec microSDHC class 4, 4GB **** ************************************** ==> /sys/block/mmcblk0/device/cid <== 02544d534130344706142c312600b300 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900001d6f7f800a400000 ==> /sys/block/mmcblk0/device/scr <== 0235800001000000 ==> /sys/block/mmcblk0/device/fwrev <== 0x6 ==> /sys/block/mmcblk0/device/hwrev <== 0x0 ==> /sys/block/mmcblk0/device/cid <== 02544d534130344706142c312600b300 ==> /sys/block/mmcblk0/device/manfid <== 0x000002 ==> /sys/block/mmcblk0/device/oemid <== 0x544d ==> /sys/block/mmcblk0/device/serial <== 0x142c3126 ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/name <== SA04G ==> /sys/block/mmcblk0/device/date <== 03/2011 clock: 33000000 Hz vdd: 20 (3.2 ~ 3.3 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 2 (4 bits) timing spec: 2 (sd high-speed) $ fdisk -lu /dev/sda Disk /dev/sda: 3951 MB, 3951034368 bytes 128 heads, 32 sectors/track, 1884 cylinders, total 7716864 sectors Units = sectors of 1 * 512 = 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 614399 307199+ 83 Linux /dev/sda2 614400 819199 102400 83 Linux /dev/sda3 819200 1851391 516096 82 Linux swap / Solaris /dev/sda4 1851392 7364607 2756608 83 Linux $ ./flashbench -a /dev/sda3 --count=100 --blocksize=2048 align 134217728 pre 894µs on 1.44ms post 1.26ms diff 362µs align 67108864 pre 919µs on 1.47ms post 1.3ms diff 358µs align 33554432 pre 894µs on 1.44ms post 1.25ms diff 362µs align 16777216 pre 880µs on 1.38ms post 1.24ms diff 326µs align 8388608 pre 872µs on 1.38ms post 1.23ms diff 329µs align 4194304 pre 880µs on 1.38ms post 1.23ms diff 326µs align 2097152 pre 1.13ms on 1.13ms post 1.12ms diff 1.58µs align 1048576 pre 1.01ms on 984µs post 982µs diff -12970n align 524288 pre 1.16ms on 1.12ms post 1.11ms diff -16689n align 262144 pre 1.02ms on 986µs post 984µs diff -18236n align 131072 pre 1.13ms on 1.12ms post 1.11ms diff -2203ns align 65536 pre 1.06ms on 987µs post 979µs diff -31308n align 32768 pre 1.13ms on 1.13ms post 1.11ms diff 3.15µs align 16384 pre 1.03ms on 986µs post 980µs diff -21555n align 8192 pre 1.12ms on 1.11ms post 1.11ms diff -8334ns align 4096 pre 1.23ms on 1.19ms post 1.18ms diff -11449n -> 4MiB eraseblock $ ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 4MiB 6.62M/s 2MiB 4.95M/s 1MiB 4.99M/s 512KiB 4.94M/s 256KiB 4.88M/s 128KiB 4.64M/s 64KiB 6M/s 32KiB 4.61M/s 16KiB 3.91M/s 8KiB 3.15M/s 4KiB 2.4M/s 2KiB 25.3K/s $ ./flashbench /dev/sda3 --open-au-nr=2 -O --blocksize=2048 4MiB 5.68M/s 2MiB 3.05M/s 1MiB 1.56M/s 512KiB 797K/s 256KiB 404K/s 128KiB 205K/s 64KiB 103K/s 32KiB 51.6K/s freezing -> 1 block $ ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 --random 4MiB 3.33M/s 2MiB 3.3M/s 1MiB 3M/s 512KiB 1.2M/s 256KiB 671K/s 128KiB 310K/s 64KiB 150K/s 32KiB 81.9K/s 16KiB 40.5K/s 8KiB 20.6K/s ^C -> unqualified for random access $ ./flashbench /dev/sda3 -f --erasesize=$[4*1024*1024] 4MiB 3.31M/s 5.06M/s 5.02M/s 5.01M/s 4.93M/s 5M/s 2MiB 4.96M/s 5.04M/s 4.98M/s 5.01M/s 5.02M/s 5.04M/s 1MiB 4.99M/s 5.01M/s 4.98M/s 5.01M/s 5.01M/s 5.02M/s 512KiB 4.99M/s 5.06M/s 5.04M/s 4.96M/s 4.97M/s 4.95M/s 256KiB 4.85M/s 5.01M/s 4.98M/s 5M/s 5.03M/s 5.05M/s 128KiB 4.66M/s 4.84M/s 4.87M/s 4.88M/s 4.93M/s 4.88M/s 64KiB 6M/s 5.47M/s 5.43M/s 5.11M/s 5.35M/s 5.38M/s 32KiB 4.59M/s 5.27M/s 5.23M/s 5.29M/s 5.2M/s 5.21M/s 16KiB 3.87M/s 4.29M/s 4.3M/s 4.24M/s 4.29M/s 4.3M/s what can i say with these? peter -- :: e n d i a n :: open source - open minds :: peter warasin :: http://www.endian.com :: peter(a)endian.com

15 years, 1 month

Lexar mobile microSDHC class 6, 16 GB

by Peter Warasin

Hi guys also a good card looks like same manfid and controller like the first filemate card in your list *********************************************** **** Lexar mobile microSDHC class 6, 16 GB **** *********************************************** ==> /sys/block/mmcblk0/device/cid <== 2842454c455841521029101ade00ac00 ==> /sys/block/mmcblk0/device/csd <== 400e00325b590000774d7f800a400000 ==> /sys/block/mmcblk0/device/scr <== 0235800000000000 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/cid <== 2842454c455841521029101ade00ac00 ==> /sys/block/mmcblk0/device/manfid <== 0x000028 ==> /sys/block/mmcblk0/device/oemid <== 0x4245 ==> /sys/block/mmcblk0/device/serial <== 0x29101ade ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/name <== LEXAR ==> /sys/block/mmcblk0/device/date <== 12/2010 clock: 33000000 Hz vdd: 20 (3.2 ~ 3.3 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 2 (4 bits) timing spec: 2 (sd high-speed) $ fdisk -lu /dev/sda Disk /dev/sda: 16.0 GB, 16012804096 bytes 128 heads, 32 sectors/track, 7635 cylinders, total 31275008 sectors Units = sectors of 1 * 512 = 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 614399 307199+ 83 Linux /dev/sda2 614400 819199 102400 83 Linux /dev/sda3 819200 1851391 516096 82 Linux swap / Solaris /dev/sda4 1851392 7364607 2756608 83 Linux $ ./flashbench -a /dev/sda3 --count=100 --blocksize=2048 align 134217728 pre 722µs on 853µs post 722µs diff 131µs align 67108864 pre 724µs on 857µs post 724µs diff 133µs align 33554432 pre 726µs on 853µs post 724µs diff 128µs align 16777216 pre 724µs on 853µs post 721µs diff 131µs align 8388608 pre 721µs on 845µs post 717µs diff 126µs align 4194304 pre 722µs on 726µs post 722µs diff 3.42µs align 2097152 pre 726µs on 726µs post 724µs diff 1.07µs align 1048576 pre 725µs on 728µs post 728µs diff 2.17µs align 524288 pre 729µs on 729µs post 729µs diff -275ns align 262144 pre 727µs on 728µs post 727µs diff 541ns align 131072 pre 723µs on 725µs post 727µs diff 542ns align 65536 pre 722µs on 720µs post 721µs diff -1576ns align 32768 pre 728µs on 726µs post 727µs diff -1480ns align 16384 pre 719µs on 721µs post 713µs diff 5.35µs align 8192 pre 724µs on 730µs post 729µs diff 3.25µs align 4096 pre 727µs on 727µs post 731µs diff -1882ns -> 8MiB erase-block size $ ./flashbench --open-au --open-au-nr=1 --erasesize=$[16*1024*1024] --blocksize=$[1024*1024] /dev/sda3 16MiB 8.99M/s 8MiB 14.5M/s 4MiB 15M/s 2MiB 15.1M/s 1MiB 16M/s -> ok, definitively 8MiB erase-block size $ ./flashbench --open-au --open-au-nr=1 --erasesize=$[8*1024*1024] --blocksize=2048 /dev/sda3 8MiB 14.6M/s 4MiB 14.6M/s 2MiB 14.8M/s 1MiB 15.7M/s 512KiB 15M/s 256KiB 15.4M/s 128KiB 14.6M/s 64KiB 15.7M/s 32KiB 10.5M/s 16KiB 7.05M/s 8KiB 4.25M/s 4KiB 2.42M/s 2KiB 1.38M/s $ ./flashbench --open-au --open-au-nr=3 --erasesize=$[8*1024*1024] --blocksize=2048 /dev/sda3 8MiB 14.7M/s 4MiB 10.2M/s 2MiB 14.8M/s 1MiB 15.6M/s 512KiB 15.4M/s 256KiB 15.4M/s 128KiB 14.7M/s 64KiB 13.5M/s 32KiB 10.6M/s 16KiB 7.16M/s 8KiB 4.31M/s 4KiB 2.22M/s 2KiB 1.12M/s $ ./flashbench --open-au --open-au-nr=5 --erasesize=$[8*1024*1024] --blocksize=2048 /dev/sda3 8MiB 14.7M/s 4MiB 9.31M/s 2MiB 14.9M/s 1MiB 15.5M/s 512KiB 15.7M/s 256KiB 15.1M/s 128KiB 14.7M/s 64KiB 13.6M/s 32KiB 10.7M/s 16KiB 7.17M/s 8KiB 4.34M/s 4KiB 2.21M/s 2KiB 1.14M/s $ ./flashbench --open-au --open-au-nr=6 --erasesize=$[8*1024*1024] --blocksize=$[1024*1024] /dev/sda3 8MiB 14.8M/s 4MiB 4.07M/s 2MiB 2.34M/s 1MiB 1.28M/s -> can handle 5 blocks concurrently $ ./flashbench --open-au --open-au-nr=10 --erasesize=$[8*1024*1024] --blocksize=2048 /dev/sda3 8MiB 14.8M/s 4MiB 4.91M/s 2MiB 2.33M/s 1MiB 1.28M/s 512KiB 671K/s ^C $ ./flashbench --open-au --open-au-nr=20 --erasesize=$[8*1024*1024] /dev/sda3 8MiB 13.7M/s 4MiB 4.11M/s ^C $ ./flashbench --open-au --open-au-nr=40 --erasesize=$[8*1024*1024] /dev/sda3 8MiB 14.3M/s 4MiB 4M/s ^C $ ./flashbench --open-au --open-au-nr=100 --erasesize=$[8*1024*1024] /dev/sda3 8MiB 13.6M/s ^C $ ./flashbench --open-au --open-au-nr=300 --erasesize=$[8*1024*1024] /dev/sda3 8MiB 14.7M/s ^C -> is this some sort of caching? $ ./flashbench --open-au --open-au-nr=5 --erasesize=$[8*1024*1024] --blocksize=2048 /dev/sda3 --random 8MiB 13.3M/s 4MiB 13.3M/s 2MiB 13.4M/s 1MiB 13.7M/s 512KiB 12.6M/s 256KiB 11.9M/s 128KiB 10.6M/s 64KiB 11.3M/s 32KiB 8.21M/s 16KiB 5.16M/s 8KiB 2.92M/s 4KiB 1.2M/s 2KiB 588K/s -> still good $ ./flashbench --open-au --open-au-nr=5 --erasesize=$[8*1024*1024] --blocksize=2048 /dev/sda3 --random --offset=$[4*1024*1024] 8MiB 2.93M/s 4MiB 4.35M/s 2MiB 2.35M/s 1MiB 1.67M/s 512KiB 1.05M/s 256KiB 656K/s 128KiB 340K/s 64KiB 168K/s ^C -> unaligned: crap peter -- :: e n d i a n :: open source - open minds :: peter warasin :: http://www.endian.com :: peter(a)endian.com

15 years, 1 month

Lexar mobile microSDHC class 4, 8 GB

by Peter Warasin

hi guys seems same as class6, 16GB but it is freezing. makes the card unusable? ********************************************** **** Lexar mobile microSDHC class 4, 8 GB **** ********************************************** ==> /sys/block/mmcblk0/device/cid <== 2842454c4558415210be0131b600b500 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900003bad7f800a400000 ==> /sys/block/mmcblk0/device/scr <== 0235800000000000 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/cid <== 2842454c4558415210be0131b600b500 ==> /sys/block/mmcblk0/device/manfid <== 0x000028 ==> /sys/block/mmcblk0/device/oemid <== 0x4245 ==> /sys/block/mmcblk0/device/serial <== 0xbe0131b6 ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/name <== LEXAR ==> /sys/block/mmcblk0/device/date <== 05/2011 clock: 33000000 Hz vdd: 20 (3.2 ~ 3.3 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 2 (4 bits) timing spec: 2 (sd high-speed) $ fdisk -lu /dev/sda Disk /dev/sda: 8010 MB, 8010072064 bytes 128 heads, 32 sectors/track, 3819 cylinders, total 15644672 sectors Units = sectors of 1 * 512 = 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 614399 307199+ 83 Linux /dev/sda2 614400 819199 102400 83 Linux /dev/sda3 819200 1851391 516096 82 Linux swap / Solaris /dev/sda4 1851392 7364607 2756608 83 Linux $ ./flashbench -a /dev/sda3 --count=100 --blocksize=2048 align 134217728 pre 738µs on 968µs post 863µs diff 168µs align 67108864 pre 742µs on 973µs post 868µs diff 168µs align 33554432 pre 737µs on 970µs post 864µs diff 170µs align 16777216 pre 741µs on 974µs post 859µs diff 174µs align 8388608 pre 742µs on 973µs post 863µs diff 171µs align 4194304 pre 738µs on 975µs post 868µs diff 172µs align 2097152 pre 743µs on 855µs post 852µs diff 57.2µs align 1048576 pre 741µs on 854µs post 867µs diff 49.7µs align 524288 pre 739µs on 864µs post 867µs diff 60.4µs align 262144 pre 738µs on 866µs post 867µs diff 63.4µs align 131072 pre 737µs on 863µs post 868µs diff 60.9µs align 65536 pre 733µs on 882µs post 869µs diff 81.6µs align 32768 pre 730µs on 870µs post 865µs diff 73µs align 16384 pre 737µs on 886µs post 869µs diff 83µs align 8192 pre 734µs on 872µs post 868µs diff 70.4µs align 4096 pre 733µs on 872µs post 864µs diff 73.4µs -> 4MiB erase-block $ ./flashbench /dev/sda3 --open-au-nr=1 -O --blocksize=2048 4MiB 11.1M/s 2MiB 11.1M/s 1MiB 11.4M/s 512KiB 10.5M/s 256KiB 11M/s 128KiB 10.9M/s 64KiB 11.5M/s 32KiB 9.48M/s 16KiB 7.71M/s 8KiB 4.66M/s 4KiB 2.54M/s 2KiB 1.47M/s $ ./flashbench /dev/sda3 --open-au-nr=5 -O --blocksize=2048 4MiB 11.1M/s 2MiB 5.86M/s 1MiB 11.1M/s 512KiB 11.3M/s 256KiB 11.2M/s 128KiB 10.6M/s 64KiB 10.9M/s 32KiB 9.4M/s 16KiB 7.54M/s 8KiB 4.57M/s 4KiB 2.34M/s 2KiB 1.19M/s $ ./flashbench /dev/sda3 --open-au-nr=10 -O --blocksize=2048 4MiB 9.56M/s 2MiB 3.2M/s 1MiB 1.8M/s 512KiB 986K/s 256KiB 516K/s 128KiB 252K/s freezing, also 2nd time (!!!) $ ./flashbench /dev/sda3 --open-au-nr=6 -O --blocksize=2048 4MiB 7.93M/s 2MiB 3.27M/s 1MiB 1.8M/s 512KiB 988K/s 256KiB 517K/s 128KiB 264K/s 64KiB 137K/s 32KiB 68.7K/s freezes (!!!) -> can handle 5 blocks -> what fishy is going on that it freezes with more? -> is this card useful at all if it behaves like this? $ ./flashbench /dev/sda3 --open-au-nr=5 -O --blocksize=2048 4MiB 10.1M/s 2MiB 10.4M/s 1MiB 10.5M/s 512KiB 10.3M/s 256KiB 10.1M/s 128KiB 9.51M/s 64KiB 9.54M/s 32KiB 7.66M/s 16KiB 5.48M/s 8KiB 3.17M/s 4KiB 1.64M/s 2KiB 901K/s $ ./flashbench /dev/sda3 --open-au-nr=5 -O --blocksize=2048 --random 4MiB 10.7M/s 2MiB 10.5M/s 1MiB 10.5M/s 512KiB 10.2M/s 256KiB 9.75M/s 128KiB 9.67M/s 64KiB 9.54M/s 32KiB 7.59M/s 16KiB 5.5M/s 8KiB 3.19M/s 4KiB 1.25M/s 2KiB 613K/s -> random is also good, same cutoff peter -- :: e n d i a n :: open source - open minds :: peter warasin :: http://www.endian.com :: peter(a)endian.com

15 years, 1 month

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