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Re: [Flashbench] flashbench sandisk 4GB class4

by Peter Warasin

[i do not shorten this msg because it was not going to the list because i did not reply to list] On 08/07/11 22:41, Arnd Bergmann wrote: > On Friday 08 July 2011 19:36:56 Peter Warasin wrote: >> Hi Arnd >> >> thank you for your help! >> >> On 08/07/11 16:55, Arnd Bergmann wrote: >>> but there is a problem using three or more. However, the >>> performance is still basically constant, so the card is >>> doing something smart. It's probably using the new Sandisk >>> trick with SLC and MLC areas. On the one hand, this is >> >> ah, so the journaling of ext3 *should* not be a problem, right? > > The journaling normally makes things worse, but by how much > depends on the card characteristics. Sometimes it's almost > nothing, sometimes it's orders of magnitude. In this case, > the answer is probably "noticeable, but not drastic". > >>> good news, because the card doesn't behave that badly, >>> on the other hand it's not easy to measure and the baseline >>> of 2 MB/s is rather slow. >> >> I see. So this means aligning to 4MB is a good thing? >> Or does this simply mean i can write 2 blocks at once? > > 4 MB alignment is always the right thing. > >>> It's still not all that bad. If you want to try other things, >>> first of all try the same with the class 10 card. Also, add the >>> '--random' flag to see if it changes anything. Any measurements >>> with '--random' are more likely to be useful than those without, >>> but it may be that the class 10 card won't like that argument >>> and becomes extremely slow. >> >> our class10 is a transcend card, so making tests with this card is like >> comparing apples with pears i think. maybe the quality of that card is >> also not the best. >> we try to get a class6 and class10 sandisk > > Transcend cards vary extremely in their quality. Even comparing two > Transcend cards with identical labels can sometimes be apples and > oranges (or pears). Some that I've seen are quite ok, others are > absolutely horrible. > > If you want to experiment more with flashbench, I suggest trying the > transcend card first, it will give you much more understandable > results, because in my experience the controllers are so much simpler > there. ok, will try that monday and send results.. >> but what --random does, isn't that more likely what a normal system does >> on the SD card when i have /var and swap on the SD card? >> so this means it is quite normal that it will be very slow, is it? > > Yes. If the card is this bad at random access, it won't work well with > Linux at all. You can either try to get a better card right away, or > continue figuring out what the card actually does. It's getting quite > interesting here, I think. > >> same test with --random: >> >> ./flashbench -O --open-au-nr=2 --random /dev/mmcblk0p3 >> 4MiB 839K/s >> 2MiB 3.26M/s >> 1MiB 8.7M/s >> 512KiB 1.48M/s >> 256KiB 731K/s >> 128KiB 952K/s >> 64KiB 1.18M/s >> 32KiB 594K/s >> 16KiB 356K/s >> >> i guess i should align to 1MB then? > > No, different issue. This card is rather tricky and what it probably > does is clean during long writes after smaller writes. If you > do "./flashbench -O --open-au-nr=2 --random /dev/mmcblk0p3 --blocksize=$[1024*1024]" > a few times repeatedly, it should get better at the second or third > run. You can normally ignore any odd results in the first one or > two rows of a test run for this reason. yes, it does, however it has very varying values when starting it a couple of times. from 2x faster to all slow. is the garbage collector slow and running all the time after 2nd try? # ./flashbench --open-au-nr=2 --random /dev/mmcblk0p3 -O 4MiB 2.16M/s 2MiB 2.86M/s 1MiB 4.2M/s 512KiB 1.47M/s 256KiB 735K/s 128KiB 904K/s 64KiB 1.12M/s 32KiB 550K/s 16KiB 360K/s # ./flashbench --open-au-nr=2 --random /dev/mmcblk0p3 -O 4MiB 3.5M/s 2MiB 6.58M/s 1MiB 9.5M/s 512KiB 1.49M/s 256KiB 734K/s 128KiB 986K/s 64KiB 1.17M/s 32KiB 589K/s 16KiB 369K/s # ./flashbench --open-au-nr=2 --random /dev/mmcblk0p3 -O 4MiB 647K/s 2MiB 603K/s 1MiB 604K/s 512KiB 631K/s 256KiB 745K/s 128KiB 987K/s 64KiB 1.17M/s 32KiB 588K/s 16KiB 309K/s # ./flashbench --open-au-nr=2 --random /dev/mmcblk0p3 -O 4MiB 652K/s 2MiB 599K/s 1MiB 604K/s 512KiB 636K/s 256KiB 736K/s 128KiB 1M/s 64KiB 1.16M/s 32KiB 540K/s 16KiB 352K/s what i also noticed on this card is that the card is running with legacy timing instead of high-speed: cat /sys/kernel/debug/mmc0/ios 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) i tried to figure out why, but most probably i guess the card will respond with SCR_SPEC_VER_1 for sda_vsn i *think*, since the controller (marvell/mvsdio) is MMC_CAP_SD_HIGHSPEED capable and i see no kernel warnings that the card is not able to do mandatory switch function will try to hardcode to SD_HIGHSPEED next week.. (for testing) could that help or is it completely irrelevant? > The result can mean one of two things: > > * the erase block size is something other than 4 MB, and you first need > to figure out the correct size to rerun it. > * The card can not actually do random writes at all, which is unusual > for Sandisk cards, but is something I've seen before in a few cases. > >> ./flashbench -O --open-au-nr=3 --random /dev/mmcblk0p3 >> 4MiB 2.84M/s >> 2MiB 2.46M/s >> 1MiB 5.23M/s >> 512KiB 1.33M/s >> 256KiB 697K/s >> 128KiB 1.08M/s >> 64KiB 904K/s >> 32KiB 534K/s >> 16KiB 360K/s >> >> ./flashbench -O --open-au-nr=5 --random /dev/mmcblk0p3 >> 4MiB 2.87M/s >> 2MiB 2.56M/s >> 1MiB 1.71M/s >> 512KiB 1.78M/s >> 256KiB 920K/s >> 128KiB 471K/s >> 64KiB 320K/s >> 32KiB 276K/s >> 16KiB 215K/s > > Not much to see here, it only shows that the card isn't all > that great for random access. > >>> You can get measurements for smaller block sizes in addition to >>> the values down to 16KB by passing --blocksize=512. This may get >>> rather slow towards the end, but is very relevant because the >>> block size used by ext3 is only 4KiB. >> >> ah great. >> ok, did i understand right that i do this tests for figuring out the >> actual values of erase block size and blocksize? >> when i know those values, what do i do with them? align partitions to >> erase block size and format filesystem with SD blocksize (if possible)? > > Correct for erasesize, that should be the partition alignment. Possible > values here are 1.5MB, 2MB, 3MB, 4MB, 6MB and 8 MB, I haven't seen > anything else with SD cards yet. > > The blocksize argument you pass to flashbench only affects how many > tests are done. By default, it assumes blocksize=16384 and stops there, aaah, i understand. > but you can pass any other blocksize that is a multiple of 512 > and a power-of-two fraction of the erasesize. When you pass blocksize=512, > flashbench will print five more lines of output, but typically get > very slow. The blocksize that you should use in the file system is the > smallest number where flashbench gives a non-catastrophic result. > Often you see something like > > ... > 64KiB 3.2M/s > 32KiB 2.0M/s > 16KiB 1.6M/s > 8KiB 821K/s > 4KiB 401K/s > 2KiB 198K/s > 1KiB 90K/s > 512 43K/s > > In that example, the block size would be 16KB: As you can see, writing > an 8KB block actually takes longer than writing a 16KB block, so it's > never worth it from a performance PoV. > >> i guess ideal for the SD card performance would be to format with 4MiB >> blocksize, but that's impossible with ext3 and bad for me because i >> waste to much space with small files, right? > > The largest block size supported by any Linux file system today is 4KB, > but we're working on increasing that to 64KB, which is quite wasteful. ah good. so right now best i can do is using 4k blocksize for the filesystem, even when this is not the ideal size. >> is the copy-on-write feature of btrfs maybe helping? > > definitely. great. will do that >> what about swap .. does it make sense creating a swap with >> 4MiB pagesize? > > You can't. The swap page size is a property of the CPU, you don't get to > choose it. ah ok. >> last question, hope i do not stress you to much: > > Don't worry. But please try to figure out any cards that you have access > to and send the results to the mailing list, so I can add it to the > database. We have around 100 devices in there today, but every new > addition helps make us the right choices when optimizing the file > systems. ah well, will do my best when we get new cards, which i hope, since i have to solve this problem somehow :) >> during bonnie tests we had a high cpu load (90%),.. and during normal >> operation of the system iowait is going up really high (90%) which >> freezes the system then >> >> is that normal? shouldn't most calculation being done by the >> microcontroller on the SD chip? > > I haven't tried it, but bonnie is really totally useless on SD cards, > and it's absolutely possible that this is always the case. it's always the case, that the cpu load is that high only with bonnie, or under normal circumstances? i ask because someone on #linaro asked me if the device is probably not dma enabled or in 1-bit mode, which would make sense i think that if it is not dma enabled it uses cpu for everything.. however, i figured out that it is not in 1-bit mode, it is in 4-bit mode, good i guess .. but i was not able how to figure out if it is dma enabled or not. i found nothing in sourcecode but how to disable dma during loading the module, which does not apply, since the driver is compiled in. peter -- :: e n d i a n :: open source - open minds :: peter warasin :: http://www.endian.com :: peter(a)endian.com

14 years, 3 months

Verbatim Executive Metal 8GB USB

by Arnd Bergmann

arnd@wuerfel:~/flashbench$ sudo fdisk -lu /dev/sdd Disk /dev/sdd: 8011 MB, 8011120640 bytes 41 heads, 41 sectors/track, 9307 cylinders, total 15646720 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: 0xd45371da Device Boot Start End Blocks Id System /dev/sdd1 8064 15646719 7819328 c W95 FAT32 (LBA) arnd@wuerfel:~ $ lsusb Bus 001 Device 016: ID 18a5:0240 Verbatim, Ltd arnd@wuerfel:~/flashbench$ sudo dosfsck /dev/sdd1 dosfsck 3.0.9, 31 Jan 2010, FAT32, LFN Free cluster summary uninitialized (should be 244224) /dev/sdd1: 1 files, 1/244225 clusters arnd@wuerfel:~/flashbench$ sudo ./flashbench -a /dev/sdd --blocksize=1024 --count=32 align 1073741824 pre 544µs on 810µs post 564µs diff 257µs align 536870912 pre 565µs on 811µs post 565µs diff 246µs align 268435456 pre 558µs on 814µs post 564µs diff 253µs align 134217728 pre 558µs on 809µs post 563µs diff 248µs align 67108864 pre 562µs on 816µs post 566µs diff 252µs align 33554432 pre 566µs on 814µs post 566µs diff 248µs align 16777216 pre 568µs on 817µs post 567µs diff 250µs align 8388608 pre 561µs on 799µs post 566µs diff 235µs align 4194304 pre 561µs on 781µs post 551µs diff 225µs align 2097152 pre 561µs on 763µs post 566µs diff 200µs align 1048576 pre 562µs on 762µs post 565µs diff 199µs align 524288 pre 561µs on 763µs post 566µs diff 200µs align 262144 pre 562µs on 762µs post 565µs diff 198µs align 131072 pre 562µs on 746µs post 566µs diff 182µs align 65536 pre 561µs on 729µs post 565µs diff 167µs align 32768 pre 561µs on 764µs post 564µs diff 201µs align 16384 pre 562µs on 762µs post 567µs diff 198µs align 8192 pre 548µs on 657µs post 550µs diff 108µs align 4096 pre 562µs on 657µs post 550µs diff 101µs align 2048 pre 558µs on 648µs post 559µs diff 89.6µs arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --blocksize=1024 --open-au --open-au-nr=1 --erasesize=4194304 4MiB 13.5M/s 2MiB 4.29M/s 1MiB 12.8M/s 512KiB 4.17M/s 256KiB 11.5M/s 128KiB 3.97M/s 64KiB 4.38M/s 32KiB 11.9M/s 16KiB 2.82M/s 8KiB 1.4M/s 4KiB 713K/s 2KiB 360K/s 1KiB 181K/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --blocksize=32768 --open-au --open-au-nr=1 --erasesize=8388608 8MiB 14.5M/s 4MiB 13.2M/s 2MiB 13.5M/s 1MiB 13.6M/s 512KiB 13.6M/s 256KiB 12.6M/s 128KiB 11.1M/s 64KiB 16.9M/s 32KiB 11.9M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --blocksize=32768 --open-au --open-au-nr=1 --erasesize=8388608 --random 8MiB 13.7M/s 4MiB 9.02M/s 2MiB 6.16M/s 1MiB 6.24M/s 512KiB 4.05M/s 256KiB 4.54M/s 128KiB 3.8M/s 64KiB 6.52M/s 32KiB 5.97M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --blocksize=32768 --open-au --erasesize=8388608 --open-au-nr=2 8MiB 13.9M/s 4MiB 13.6M/s 2MiB 13.2M/s 1MiB 13.5M/s 512KiB 13.3M/s 256KiB 12.5M/s 128KiB 11.1M/s 64KiB 15.7M/s 32KiB 11.2M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --blocksize=32768 --open-au --erasesize=8388608 --open-au-nr=4 8MiB 14.2M/s 4MiB 13.3M/s 2MiB 13.3M/s 1MiB 13.3M/s 512KiB 13.2M/s 256KiB 12.2M/s 128KiB 11.2M/s 64KiB 15.2M/s 32KiB 11.2M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --blocksize=32768 --open-au --erasesize=8388608 --open-au-nr=6 8MiB 13.9M/s 4MiB 13.3M/s 2MiB 13.1M/s 1MiB 13.4M/s 512KiB 13.4M/s 256KiB 12.3M/s 128KiB 11.2M/s 64KiB 15.3M/s 32KiB 11.3M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --open-au --erasesize=8388608 --open-au-nr=8 --blocksize=1048576 8MiB 13.5M/s 4MiB 13.4M/s 2MiB 13.2M/s 1MiB 13.3M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --open-au --erasesize=8388608 --open-au-nr=10 --blocksize=1048576 8MiB 13.6M/s 4MiB 13.3M/s 2MiB 13.2M/s 1MiB 13.3M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --open-au --erasesize=8388608 --open-au-nr=12 --blocksize=1048576 8MiB 13.5M/s 4MiB 13.4M/s 2MiB 13.1M/s 1MiB 13.3M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --open-au --erasesize=8388608 --open-au-nr=14 --blocksize=1048576 8MiB 13.4M/s 4MiB 11.7M/s 2MiB 9.3M/s 1MiB 5.71M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --open-au --erasesize=8388608 --open-au-nr=16 --blocksize=1048576 8MiB 13.8M/s 4MiB 10.6M/s 2MiB 5.95M/s 1MiB 4.14M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --blocksize=512 --open-au --erasesize=8388608 --open-au-nr=13 8MiB 13.4M/s 4MiB 12.4M/s 2MiB 10.8M/s 1MiB 8.27M/s 512KiB 5.8M/s 256KiB 3.5M/s 128KiB 1.96M/s 64KiB 1.1M/s 32KiB 560K/s 16KiB 2.6M/s 8KiB 1.29M/s 4KiB 655K/s 2KiB 330K/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --blocksize=8192 --open-au --erasesize=8388608 --open-au-nr=12 --random 8MiB 13.4M/s 4MiB 9.03M/s 2MiB 6.17M/s 1MiB 6.24M/s 512KiB 4.06M/s 256KiB 4.54M/s 128KiB 3.8M/s 64KiB 6.47M/s 32KiB 5.79M/s 16KiB 2.72M/s 8KiB 1.33M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --blocksize=8192 --open-au --erasesize=8388608 --open-au-nr=13 --random 8MiB 13.5M/s 4MiB 8.81M/s 2MiB 5.43M/s 1MiB 3.81M/s 512KiB 2.27M/s 256KiB 1.34M/s 128KiB 860K/s 64KiB 481K/s 32KiB 229K/s 16KiB 2.46M/s 8KiB 1.23M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdd --blocksize=8192 --open-au --erasesize=8388608 --open-au-nr=12 --random --offset=$[20 * 1024 * 1024] [sudo] password for arnd: 8MiB 10.5M/s 4MiB 5.59M/s

14 years, 3 months

flashbench sandisk 4GB class4

by Peter Warasin

hi arnd and list here are my values for 4GB class4 sandisk on armv5tel (marvell kirkwood Feroceon 88FR131 rev 1 (v5l)) running 2.6.32.29 cat /sys/block/mmcblk*/device/{manfid,oemid,name,serial,date} 0x000003 0x5344 SU04G 0x03a847f0 10/2010 ./flashbench -O --open-au-nr=1 /dev/mmcblk0p3 4MiB 9.06M/s 2MiB 9.23M/s 1MiB 8.88M/s 512KiB 9M/s 256KiB 8.86M/s 128KiB 9.48M/s 64KiB 9.48M/s 32KiB 8.29M/s 16KiB 3.14M/s ./flashbench -O --open-au-nr=2 /dev/mmcblk0p3 4MiB 2.08M/s 2MiB 2.21M/s 1MiB 6.72M/s 512KiB 9.4M/s 256KiB 8.72M/s 128KiB 9.04M/s 64KiB 9.49M/s 32KiB 8.31M/s 16KiB 2.34M/s ./flashbench -O --open-au-nr=3 /dev/mmcblk0p3 4MiB 2.79M/s 2MiB 2.36M/s 1MiB 2.39M/s 512KiB 3.04M/s 256KiB 2.31M/s 128KiB 2.04M/s 64KiB 2.48M/s 32KiB 2.06M/s 16KiB 1.32M/s ./flashbench -O --open-au-nr=4 /dev/mmcblk0p3 4MiB 3.34M/s 2MiB 2.32M/s 1MiB 2.37M/s 512KiB 2.46M/s 256KiB 1.52M/s 128KiB 3.17M/s 64KiB 2.44M/s 32KiB 1.88M/s 16KiB 1.01M/s ./flashbench -O --open-au-nr=5 /dev/mmcblk0p3 4MiB 1.86M/s 2MiB 2.18M/s 1MiB 1.96M/s 512KiB 1.73M/s 256KiB 1.49M/s 128KiB 1.82M/s 64KiB 2.12M/s 32KiB 1.73M/s 16KiB 829K/s ./flashbench -O --open-au-nr=8 /dev/mmcblk0p3 4MiB 2M/s 2MiB 2.09M/s 1MiB 1.27M/s 512KiB 875K/s 256KiB 836K/s 128KiB 946K/s 64KiB 978K/s 32KiB 788K/s 16KiB 708K/s ./flashbench -O --open-au-nr=10 /dev/mmcblk0p3 4MiB 1.53M/s 2MiB 1.92M/s 1MiB 1.15M/s 512KiB 723K/s 256KiB 710K/s 128KiB 562K/s 64KiB 579K/s 32KiB 270K/s 16KiB 245K/s thank you in advance peter (aka _r3_@freenode) -- :: e n d i a n :: open source - open minds :: peter warasin :: http://www.endian.com :: peter(a)endian.com

14 years, 3 months

PQI microSD 8GB (2009)

by Arnd Bergmann

Disk /dev/mmcblk0: 8017 MB, 8017412096 bytes 255 heads, 63 sectors/track, 974 cylinders, total 15659008 sectors Units = sectors of 1 * 512 = 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/mmcblk0p1 63 524350 262144 b W95 FAT32 Partition 1 has different physical/logical endings: phys=(1023, 254, 63) logical=(32, 163, 2) /dev/mmcblk0p2 524412 15658964 7567276+ 83 Linux ==> /sys/block/mmcblk0/device/block <== head: error reading `/sys/block/mmcblk0/device/block': Is a directory ==> /sys/block/mmcblk0/device/cid <== 1a505175534420201025503155009200 ==> /sys/block/mmcblk0/device/csd <== 400e00325f5900003bbb7f800a400000 ==> /sys/block/mmcblk0/device/date <== 02/2009 ==> /sys/block/mmcblk0/device/driver <== head: error reading `/sys/block/mmcblk0/device/driver': Is a directory ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/manfid <== 0x00001a ==> /sys/block/mmcblk0/device/name <== uSD ==> /sys/block/mmcblk0/device/oemid <== 0x5051 ==> /sys/block/mmcblk0/device/power <== head: error reading `/sys/block/mmcblk0/device/power': Is a directory ==> /sys/block/mmcblk0/device/scr <== 0235000000000000 ==> /sys/block/mmcblk0/device/serial <== 0x25503155 ==> /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=uSD MODALIAS=mmc:block arnd@klappe2:~/git/flashbench$ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 --count=32 align 805306368 pre 597µs on 677µs post 576µs diff 90.1µs align 536870912 pre 579µs on 691µs post 590µs diff 106µs align 402653184 pre 587µs on 648µs post 580µs diff 64.9µs align 268435456 pre 600µs on 688µs post 585µs diff 95.5µs align 201326592 pre 590µs on 677µs post 584µs diff 90µs align 134217728 pre 591µs on 683µs post 587µs diff 94.2µs align 100663296 pre 598µs on 687µs post 590µs diff 93µs align 67108864 pre 593µs on 679µs post 588µs diff 88.5µs align 50331648 pre 592µs on 693µs post 592µs diff 100µs align 33554432 pre 595µs on 685µs post 594µs diff 90µs align 25165824 pre 594µs on 688µs post 586µs diff 98.4µs align 16777216 pre 586µs on 676µs post 596µs diff 85µs align 12582912 pre 595µs on 683µs post 589µs diff 91.2µs align 8388608 pre 591µs on 689µs post 591µs diff 97.8µs align 6291456 pre 578µs on 682µs post 586µs diff 99.4µs align 4194304 pre 598µs on 696µs post 596µs diff 98.8µs align 3145728 pre 585µs on 657µs post 606µs diff 61.7µs align 2097152 pre 605µs on 678µs post 578µs diff 86.2µs align 1572864 pre 582µs on 656µs post 600µs diff 65.6µs align 1048576 pre 584µs on 657µs post 607µs diff 61.6µs align 786432 pre 590µs on 652µs post 604µs diff 54.9µs align 524288 pre 583µs on 650µs post 599µs diff 59µs align 393216 pre 588µs on 649µs post 599µs diff 55.6µs align 262144 pre 582µs on 646µs post 600µs diff 55µs ^C arnd@klappe2:~/git/flashbench$ ^C arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --erasesize=2097152 --open-au --open-au-nr=1 2MiB 4.48M/s 1MiB 4.15M/s 512KiB 4.16M/s 256KiB 4.45M/s 128KiB 4.76M/s 64KiB 8.51M/s 32KiB 7.23M/s 16KiB 6.18M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --erasesize=2097152 --open-au --open-au-nr=1 2MiB 8.79M/s 1MiB 4.22M/s 512KiB 4.19M/s 256KiB 4.46M/s 128KiB 4.76M/s 64KiB 8.73M/s 32KiB 7.73M/s 16KiB 6.43M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --erasesize=2097152 --open-au --open-au-nr=2 2MiB 8.71M/s 1MiB 6.25M/s 512KiB 8.8M/s 256KiB 8.84M/s 128KiB 8.82M/s 64KiB 8.79M/s 32KiB 7.79M/s 16KiB 6.4M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --erasesize=2097152 --open-au --open-au-nr=4 2MiB 8.71M/s 1MiB 6.27M/s 512KiB 8.65M/s 256KiB 8.76M/s 128KiB 8.71M/s 64KiB 8.65M/s 32KiB 7.61M/s 16KiB 6.23M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --erasesize=2097152 --open-au --open-au-nr=6 2MiB 8.82M/s 1MiB 4.86M/s 512KiB 2.06M/s 256KiB 1.15M/s 128KiB 617K/s ^C arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --erasesize=2097152 --open-au --open-au-nr=5 2MiB 5.31M/s 1MiB 7.51M/s 512KiB 8.74M/s 256KiB 8.7M/s 128KiB 8.77M/s 64KiB 8.71M/s 32KiB 7.62M/s 16KiB 6.23M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --erasesize=2097152 --open-au --open-au-nr=5 --blocksize=512 2MiB 8M/s 1MiB 8.74M/s 512KiB 8.82M/s 256KiB 8.86M/s 128KiB 8.8M/s 64KiB 8.73M/s 32KiB 7.6M/s 16KiB 5.67M/s 8KiB 3.57M/s 4KiB 1.77M/s 2KiB 847K/s 1KiB 428K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --erasesize=2097152 --open-au --open-au-nr=5 --blocksize=512 --random 2MiB 7.04M/s 1MiB 4.17M/s 512KiB 4.09M/s 256KiB 4.21M/s 128KiB 4.2M/s 64KiB 4.17M/s 32KiB 3.5M/s 16KiB 2.78M/s 8KiB 1.83M/s 4KiB 984K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --erasesize=2097152 --open-au --open-au-nr=6 --blocksize=512 --random 2MiB 5.26M/s 1MiB 4.43M/s 512KiB 2.17M/s 256KiB 1.18M/s ^C arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --erasesize=2097152 --blocksize=512 --findfat --random --fat-nr=9 2MiB 4.98M/s 8.8M/s 4.92M/s 4.94M/s 4.93M/s 4.9M/s 8.85M/s 8.93M/s 8.87M/s 1MiB 4.28M/s 4.22M/s 4.28M/s 4.25M/s 4.23M/s 3.09M/s 3.22M/s 3.03M/s 3.08M/s 512KiB 3.08M/s 3M/s 3.5M/s 3.04M/s 3.07M/s 3.07M/s 3.07M/s 3.09M/s 3.06M/s 256KiB 3.06M/s 3.09M/s 3.07M/s 3.06M/s 3.07M/s 3.06M/s 3.08M/s 3.06M/s 3.07M/s 128KiB 3.06M/s 3.04M/s 3.05M/s 3.05M/s 3.05M/s 3.06M/s 3.05M/s 3.08M/s 3.06M/s 64KiB 3.03M/s 3.05M/s 3.06M/s 3.06M/s 3.09M/s 3.06M/s 3.06M/s 3.03M/s 3.06M/s 32KiB 2.69M/s 2.7M/s 2.68M/s 2.71M/s 2.69M/s 2.71M/s 2.71M/s 2.69M/s 2.69M/s

14 years, 3 months

Transcend CF 4 GB 133x

by Arnd Bergmann

arnd@wuerfel:~/flashbench$ sudo fdisk -lu /dev/sdc Disk /dev/sdc: 4009 MB, 4009549824 bytes 255 heads, 63 sectors/track, 487 cylinders, total 7831152 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: 0x001c2022 Device Boot Start End Blocks Id System /dev/sdc1 * 63 7830143 3915040+ b W95 FAT32 Partition 1 has different physical/logical endings: phys=(1023, 254, 63) logical=(487, 102, 63) arnd@wuerfel:~/flashbench$ sudo ./flashbench -a /dev/sdc --blocksize 1024 align 536870912 pre 615µs on 744µs post 497µs diff 188µs align 268435456 pre 607µs on 743µs post 530µs diff 174µs align 134217728 pre 618µs on 744µs post 535µs diff 167µs align 67108864 pre 618µs on 745µs post 574µs diff 149µs align 33554432 pre 618µs on 743µs post 500µs diff 185µs align 16777216 pre 621µs on 748µs post 518µs diff 178µs align 8388608 pre 618µs on 745µs post 517µs diff 177µs align 4194304 pre 628µs on 758µs post 551µs diff 168µs align 2097152 pre 549µs on 659µs post 568µs diff 100µs align 1048576 pre 553µs on 655µs post 550µs diff 104µs align 524288 pre 534µs on 658µs post 535µs diff 124µs align 262144 pre 536µs on 656µs post 535µs diff 120µs align 131072 pre 591µs on 655µs post 618µs diff 50.2µs align 65536 pre 567µs on 656µs post 569µs diff 88.2µs align 32768 pre 553µs on 657µs post 534µs diff 113µs align 16384 pre 553µs on 653µs post 569µs diff 92.4µs align 8192 pre 551µs on 656µs post 550µs diff 105µs align 4096 pre 534µs on 658µs post 535µs diff 124µs align 2048 pre 545µs on 656µs post 569µs diff 98.7µs arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdc --erasesize=4194304 --blocksi=512 --open-au --open-au-nr=1 4MiB 10.7M/s 2MiB 10.6M/s 1MiB 10.7M/s 512KiB 10.4M/s 256KiB 10.8M/s 128KiB 9.66M/s 64KiB 11.8M/s 32KiB 10.1M/s 16KiB 8.22M/s 8KiB 3.74M/s 4KiB 1.83M/s 2KiB 900K/s 1KiB 451K/s 512B 224K/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdc --erasesize=$[4194304] --blocksize=16384 --open-au --open-au-nr=2 4MiB 10.8M/s 2MiB 10.6M/s 1MiB 10.7M/s 512KiB 10.5M/s 256KiB 10.5M/s 128KiB 9.07M/s 64KiB 10.1M/s 32KiB 7.75M/s 16KiB 5.43M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdc --erasesize=$[4194304] --blocksize=16384 --open-au --open-au-nr=4 4MiB 10.8M/s 2MiB 10.6M/s 1MiB 10.7M/s 512KiB 10.5M/s 256KiB 10.5M/s 128KiB 8.98M/s 64KiB 10M/s 32KiB 7.71M/s 16KiB 5.42M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdc --erasesize=$[4194304] --blocksize=16384 --open-au --open-au-nr=6 4MiB 10.8M/s 2MiB 10.6M/s 1MiB 10.6M/s 512KiB 10.6M/s 256KiB 10.4M/s 128KiB 8.96M/s 64KiB 10M/s 32KiB 7.68M/s 16KiB 5.39M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdc --erasesize=$[4194304] --blocksize=1024 --open-au --open-au-nr=11 4MiB 10.8M/s 2MiB 10.6M/s 1MiB 10.7M/s 512KiB 10.5M/s 256KiB 10.4M/s 128KiB 8.91M/s 64KiB 9.99M/s 32KiB 7.62M/s 16KiB 5.33M/s 8KiB 2.45M/s 4KiB 1.17M/s 2KiB 579K/s 1KiB 285K/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdc --erasesize=$[4194304] --blocksize=16384 --open-au --open-au-nr=12 4MiB 10.7M/s 2MiB 4.52M/s 1MiB 1.13M/s 512KiB 561K/s 256KiB 283K/s 128KiB 142K/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdc --erasesize=4194304 --blocksize=512 --open-au --open-au-nr=1 --random 4MiB 11M/s 2MiB 3.01M/s 1MiB 9.02M/s 512KiB 3.04M/s 256KiB 3.04M/s 128KiB 1.77M/s 64KiB 9.46M/s 32KiB 3.04M/s 16KiB 2.86M/s 8KiB 1.3M/s 4KiB 870K/s 2KiB 426K/s 1KiB 211K/s 512B 105K/s arnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdc --erasesize=$[4194304] --blocksize=1024 --open-au --open-au-nr=11 --random 4MiB 10.7M/s 2MiB 3.03M/s 1MiB 3.22M/s 512KiB 3.03M/s 256KiB 3M/s 128KiB 2.68M/s 64KiB 3.12M/s 32KiB 2.77M/s 16KiB 2.4M/s 8KiB 1.43M/s 4KiB 706K/s (reverse-i-search)`da': sudo fdisk -l /dev/s^Carnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdc --erasesize=$[4194304] --blocksize=1024 --open-au --open-au-nr=12 --random 4MiB 8.91M/s 2MiB 3.08M/s 1MiB 1.19M/s 512KiB 569K/s ^Carnd@wuerfel:~/flashbench$ sudo ./flashbench /dev/sdc --erasesize=$[4194304 * 2] --ocksize=1024 --open-au --open-au-nr=6 --random 8MiB 10M/s 4MiB 9.01M/s 2MiB 3.71M/s 1MiB 1.46M/s 512KiB 897K/s arnd@wuerfel:~/flashbench$ sudo dd if=/dev/zero of=/dev/sdc bs=1M count=100 oflag=direct 100+0 records in 100+0 records out 104857600 bytes (105 MB) copied, 10.8724 s, 9.6 MB/s

14 years, 4 months

Adata S102 USB3.0 8GB

by Arnd Bergmann

Bus 002 Device 002: ID 125f:312a A-DATA Technology Co., Ltd. arnd@klappe2:~$ sudo hexdump -C /dev/sdc 00000000 eb 58 90 4d 53 44 4f 53 35 2e 30 00 02 08 22 00 |.X.MSDOS5.0...".| 00000010 02 00 00 00 00 f8 00 00 3f 00 ff 00 00 00 00 00 |........?.......| 00000020 00 80 eb 00 c3 3a 00 00 00 00 00 00 02 00 00 00 |.....:..........| 00000030 01 00 06 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000040 00 00 29 73 8b 36 a8 4e 4f 20 4e 41 4d 45 20 20 |..)s.6.NO NAME | 00000050 20 20 46 41 54 33 32 20 20 20 33 c9 8e d1 bc f4 | FAT32 3.....| 00000060 7b 8e c1 8e d9 bd 00 7c 88 4e 02 8a 56 40 b4 08 |{......|.N..V@..| 00000070 cd 13 73 05 b9 ff ff 8a f1 66 0f b6 c6 40 66 0f |..s......f...(a)f.| 00000080 b6 d1 80 e2 3f f7 e2 86 cd c0 ed 06 41 66 0f b7 |....?.......Af..| 00000090 c9 66 f7 e1 66 89 46 f8 83 7e 16 00 75 38 83 7e |.f..f.F..~..u8.~| 000000a0 2a 00 77 32 66 8b 46 1c 66 83 c0 0c bb 00 80 b9 |*.w2f.F.f.......| 000000b0 01 00 e8 2b 00 e9 48 03 a0 fa 7d b4 7d 8b f0 ac |...+..H...}.}...| 000000c0 84 c0 74 17 3c ff 74 09 b4 0e bb 07 00 cd 10 eb |..t.<.t.........| 000000d0 ee a0 fb 7d eb e5 a0 f9 7d eb e0 98 cd 16 cd 19 |...}....}.......| 000000e0 66 60 66 3b 46 f8 0f 82 4a 00 66 6a 00 66 50 06 |f`f;F...J.fj.fP.| 000000f0 53 66 68 10 00 01 00 80 7e 02 00 0f 85 20 00 b4 |Sfh.....~.... ..| 00000100 41 bb aa 55 8a 56 40 cd 13 0f 82 1c 00 81 fb 55 |A..U.V@........U| 00000110 aa 0f 85 14 00 f6 c1 01 0f 84 0d 00 fe 46 02 b4 |.............F..| 00000120 42 8a 56 40 8b f4 cd 13 b0 f9 66 58 66 58 66 58 |B.V@......fXfXfX| 00000130 66 58 eb 2a 66 33 d2 66 0f b7 4e 18 66 f7 f1 fe |fX.*f3.f..N.f...| 00000140 c2 8a ca 66 8b d0 66 c1 ea 10 f7 76 1a 86 d6 8a |...f..f....v....| 00000150 56 40 8a e8 c0 e4 06 0a cc b8 01 02 cd 13 66 61 |V@............fa| 00000160 0f 82 54 ff 81 c3 00 02 66 40 49 0f 85 71 ff c3 |..T.....f@I..q..| 00000170 4e 54 4c 44 52 20 20 20 20 20 20 00 00 00 00 00 |NTLDR .....| 00000180 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 000001a0 00 00 00 00 00 00 00 00 00 00 00 00 0d 0a 52 65 |..............Re| 000001b0 6d 6f 76 65 20 64 69 73 6b 73 20 6f 72 20 6f 74 |move disks or ot| 000001c0 68 65 72 20 6d 65 64 69 61 2e ff 0d 0a 44 69 73 |her media....Dis| 000001d0 6b 20 65 72 72 6f 72 ff 0d 0a 50 72 65 73 73 20 |k error...Press | 000001e0 61 6e 79 20 6b 65 79 20 74 6f 20 72 65 73 74 61 |any key to resta| 000001f0 72 74 0d 0a 00 00 00 00 00 ac cb d8 00 00 55 aa |rt............U.| arnd@klappe2:~$ sudo fsck.msdos /dev/sdc dosfsck 3.0.9, 31 Jan 2010, FAT32, LFN /dev/sdc: 1 files, 1/1925451 clusters arnd@klappe2:~/git/flashbench$ sudo ./flashbench -a /dev/sdc -b 1024 align 805306368 pre 581µs on 795µs post 581µs diff 214µs align 536870912 pre 588µs on 821µs post 592µs diff 231µs align 402653184 pre 594µs on 821µs post 596µs diff 226µs align 268435456 pre 583µs on 816µs post 593µs diff 228µs align 201326592 pre 581µs on 793µs post 585µs diff 209µs align 134217728 pre 583µs on 784µs post 582µs diff 202µs align 100663296 pre 581µs on 790µs post 581µs diff 209µs align 67108864 pre 579µs on 795µs post 581µs diff 215µs align 50331648 pre 582µs on 798µs post 585µs diff 214µs align 33554432 pre 576µs on 794µs post 579µs diff 217µs align 25165824 pre 581µs on 790µs post 582µs diff 208µs align 16777216 pre 584µs on 785µs post 573µs diff 206µs align 12582912 pre 578µs on 790µs post 570µs diff 216µs align 8388608 pre 579µs on 798µs post 580µs diff 218µs align 6291456 pre 580µs on 573µs post 579µs diff -6271ns align 4194304 pre 583µs on 795µs post 584µs diff 212µs align 3145728 pre 583µs on 575µs post 584µs diff -8901ns align 2097152 pre 573µs on 582µs post 583µs diff 4.12µs align 1572864 pre 578µs on 584µs post 585µs diff 2.43µs align 1048576 pre 580µs on 585µs post 585µs diff 2.36µs align 786432 pre 577µs on 583µs post 581µs diff 3.79µs align 524288 pre 581µs on 583µs post 576µs diff 5.01µs align 393216 pre 581µs on 585µs post 585µs diff 1.7µs align 262144 pre 577µs on 580µs post 584µs diff -1288ns align 196608 pre 574µs on 583µs post 582µs diff 4.71µs align 131072 pre 584µs on 577µs post 584µs diff -6945ns align 98304 pre 583µs on 578µs post 583µs diff -4843ns align 65536 pre 576µs on 579µs post 581µs diff 628ns align 49152 pre 583µs on 585µs post 583µs diff 1.78µs align 32768 pre 578µs on 583µs post 585µs diff 1.18µs align 24576 pre 572µs on 579µs post 577µs diff 4.39µs align 16384 pre 580µs on 583µs post 574µs diff 6.61µs align 12288 pre 575µs on 701µs post 583µs diff 122µs align 8192 pre 581µs on 585µs post 579µs diff 4.95µs align 6144 pre 580µs on 585µs post 584µs diff 2.52µs align 4096 pre 579µs on 705µs post 582µs diff 125µs align 3072 pre 580µs on 575µs post 580µs diff -4836ns align 2048 pre 571µs on 585µs post 584µs diff 7.55µs arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 /dev/sdc --blocksize=512 --open-au --open-au-nr=1 4MiB 13.1M/s 2MiB 13.1M/s 1MiB 12.8M/s 512KiB 12.8M/s 256KiB 12.8M/s 128KiB 12.7M/s 64KiB 12.9M/s 32KiB 12.8M/s 16KiB 12.8M/s 8KiB 12.6M/s 4KiB 7.95M/s 2KiB 5.4M/s 1KiB 2.71M/s 512B 1.34M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 /dev/sdc --blocksize=512 --open-au --open-au-nr=2 4MiB 13M/s 2MiB 12.8M/s 1MiB 12.8M/s 512KiB 12.7M/s 256KiB 12.6M/s 128KiB 12.3M/s 64KiB 11.7M/s 32KiB 10.8M/s 16KiB 9.36M/s 8KiB 5.63M/s 4KiB 1.16M/s 2KiB 590K/s 1KiB 294K/s 512B 151K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 /dev/sdc --blocksize=4096 --open-au --open-au-nr=4 4MiB 13M/s 2MiB 12.8M/s 1MiB 12.8M/s 512KiB 12.7M/s 256KiB 12.6M/s 128KiB 12.3M/s 64KiB 11.8M/s 32KiB 10.8M/s 16KiB 9.38M/s 8KiB 5.66M/s 4KiB 856K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 /dev/sdc --blocksize=8192 --open-au --open-au-nr=5 4MiB 12.9M/s 2MiB 10.2M/s 1MiB 9.29M/s 512KiB 8.85M/s 256KiB 8.6M/s 128KiB 8.38M/s 64KiB 8.09M/s 32KiB 7.57M/s 16KiB 6.64M/s 8KiB 4.37M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 /dev/sdc --blocksize=8192 --open-au --open-au-nr=6 4MiB 12.8M/s 2MiB 9M/s 1MiB 7.83M/s 512KiB 7.33M/s 256KiB 7.07M/s 128KiB 6.86M/s 64KiB 6.66M/s 32KiB 6.27M/s 16KiB 5.59M/s 8KiB 3.34M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 /dev/sdc --blocksize=65536 --open-au --open-au-nr=8 4MiB 12.8M/s 2MiB 7.85M/s 1MiB 6.59M/s 512KiB 6.09M/s 256KiB 5.82M/s 128KiB 4.42M/s 64KiB 5.5M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 /dev/sdc --blocksize=65536 --open-au --open-au-nr=12 4MiB 12.9M/s 2MiB 6.97M/s 1MiB 5.68M/s 512KiB 3.09M/s 256KiB 3.01M/s 128KiB 4.81M/s 64KiB 4.34M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 /dev/sdc --blocksize=65536 --open-au --open-au-nr=16 4MiB 13M/s 2MiB 6.62M/s 1MiB 3.63M/s 512KiB 2.54M/s 256KiB 2.14M/s 128KiB 2.3M/s 64KiB 2.27M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 /dev/sdc --blocksize=65536 --open-au --open-au-nr=24 4MiB 12.9M/s 2MiB 5.67M/s 1MiB 1.66M/s 512KiB 750K/s ^C arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 /dev/sdc --blocksize=$[512*1024] --open-au --open-au-nr=18 4MiB 12.1M/s 2MiB 6.26M/s 1MiB 2.66M/s 512KiB 1.69M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 /dev/sdc --blocksize=$[256*1024] --open-au --open-au-nr=20 4MiB 12.7M/s 2MiB 6.4M/s 1MiB 2.83M/s 512KiB 1.78M/s 256KiB 1.48M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[256 * 1024] /dev/sdc --blocksize=8192 --open-au --open-au-nr=16 --offset=$[24*1024*1024 + 65536] 256KiB 12.8M/s 128KiB 12.5M/s 64KiB 11.9M/s 32KiB 2.07M/s 16KiB 1.44M/s 8KiB 730K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[256 * 1024] /dev/sdc --blocksize=8192 --open-au --open-au-nr=17 --offset=$[24*1024*1024 + 65536] 256KiB 2.22M/s 128KiB 204K/s 64KiB 183K/s 32KiB 79K/s 16KiB 37.2K/s 8KiB 18.7K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[256 * 1024] /dev/sdc --blocksize=8192 --open-au --open-au-nr=20 --offset=$[24*1024*1024 + 65536] 256KiB 2.52M/s 128KiB 185K/s 64KiB 129K/s 32KiB 63.1K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[256 * 1024] /dev/sdc --blocksize=8192 --open-au --open-au-nr=16 --offset=$[24*1024*1024 + 65536] --random 256KiB 13M/s 128KiB 12.6M/s 64KiB 12M/s 32KiB 11M/s 16KiB 9.42M/s 8KiB 638K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[4194304] /dev/sdc --blocksize=$[1024] --open-au --open-au-nr=4 --random 4MiB 12.9M/s 2MiB 13M/s 1MiB 7.82M/s 512KiB 4.96M/s 256KiB 4.18M/s 128KiB 3.73M/s 64KiB 3.66M/s 32KiB 3.45M/s 16KiB 2.77M/s 8KiB 1.56M/s 4KiB 791K/s 2KiB 401K/s 1KiB 205K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[4 * 1024 * 1024] /dev/sdc --blocksize=8192 --open-au --open-au-nr=16 --offset=$[24*1024*1024] --random 4MiB 13M/s 2MiB 6.6M/s 1MiB 2.52M/s 512KiB 1.97M/s 256KiB 1.12M/s 128KiB 1.35M/s

14 years, 4 months

Pls kindly check the new item -- T010 4 cards + 2.3 Scren Black berry style

by Picasa Web Albums

Dear Friend, Nice day to you! New items with great price mobile phone here come out, pls check the attachment to info the ID. 1>4 Cards & 4 Standby 2>Bluetooth 3>2.3" QVGA Screen 4>30W Dual Cameras 5>Support T-Flash Card 6>FM Radio 7>Analog TV（option） 8>JAVA 9>Support Mp3、Mp4 10>colors：blue & red & purple & silver Anything more you want to know, please send us email. Best wishes Juce Mobile: 86-13424432252 Tel: 86-755-85282599 Fax: 86-755-81752355 E-mail: elink(a)vip.188.com Web size: www.oemmobile.com Factory Address: 5/F, Building 21, ChenTian Industrial Park, Shenzhen, GuangDong Province, China

14 years, 4 months

New item come out -- T010 4 cards + 2.3 Scren

by Picasa Web Albums

14 years, 4 months

Pls kindly check the new item -- T010 4 cards + 2.3 Scren Black berry style

by Picasa Web Albums

14 years, 4 months

Pls kindly check the new item -- T010 4 cards + 2.3 Scren Black berry style

by Picasa Web Albums

Dear Customer (Manager), Good day! New items with great price mobile phone here come out, pls check the attachment to info the ID. 1>4 Cards & 4 Standby 2>Bluetooth 3>2.3" QVGA Screen 4>30W Dual Cameras 5>Support T-Flash Card 6>FM Radio 7>Analog TV（option） 8>JAVA 9>Support Mp3、Mp4 10>colors：blue & red & purple & silver If you need the detail requirement, please don't hesitate to contact us. Best wishes Juce Mobile: 86-13424432252 Tel: 86-755-85282599 Fax: 86-755-81752355 E-mail: elink(a)vip.188.com Web size: www.oemmobile.com Factory Address: 5/F, Building 21, ChenTian Industrial Park, Shenzhen, GuangDong Province, China

14 years, 4 months

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