Flashbench-results

flashbench-results@lists.linaro.org

174 discussions

by Sergio benjamim Rocha filho

Hello! These are the results from a SanDisk SDHC card 8 GB class 4 (7560 MiB), using flashbench 62-1 (Linux Mint 15 / Ubuntu 13.04 repository, and kernel 3.11.0). The SD Card is raw, without formatation. There are informations about the card controller from my laptop too. I have some questions about flashbench tool. Are there any development in this tool yet? Am I using the correct version? What is the -a parameter, it's not in documentation (it's not in the --help parameter too). lsusb -v Bus 001 Device 008: ID 058f:6366 Alcor Micro Corp. Multi Flash Reader Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x058f Alcor Micro Corp. idProduct 0x6366 Multi Flash Reader bcdDevice 1.00 iManufacturer 1 Generic iProduct 2 Mass Storage Device iSerial 3 058F63666433 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 32 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 100mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 8 Mass Storage bInterfaceSubClass 6 SCSI bInterfaceProtocol 80 Bulk-Only iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x01 EP 1 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 bNumConfigurations 1 Device Status: 0x0000 (Bus Powered) head /sys/block/sdb/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/sdb/device/block <== ==> /sys/block/sdb/device/bsg <== ==> /sys/block/sdb/device/device_blocked <== 0 ==> /sys/block/sdb/device/dh_state <== detached ==> /sys/block/sdb/device/driver <== ==> /sys/block/sdb/device/eh_timeout <== 10 ==> /sys/block/sdb/device/evt_media_change <== 0 ==> /sys/block/sdb/device/generic <== ==> /sys/block/sdb/device/iocounterbits <== 32 ==> /sys/block/sdb/device/iodone_cnt <== 0x10d82 ==> /sys/block/sdb/device/ioerr_cnt <== 0x2 ==> /sys/block/sdb/device/iorequest_cnt <== 0x10d82 ==> /sys/block/sdb/device/max_sectors <== 240 ==> /sys/block/sdb/device/modalias <== scsi:t-0x00 ==> /sys/block/sdb/device/model <== Card Reader ==> /sys/block/sdb/device/power <== ==> /sys/block/sdb/device/queue_depth <== 1 ==> /sys/block/sdb/device/queue_type <== none ==> /sys/block/sdb/device/rev <== 1.00 ==> /sys/block/sdb/device/scsi_device <== ==> /sys/block/sdb/device/scsi_disk <== ==> /sys/block/sdb/device/scsi_generic <== ==> /sys/block/sdb/device/scsi_level <== 0 ==> /sys/block/sdb/device/state <== running ==> /sys/block/sdb/device/subsystem <== ==> /sys/block/sdb/device/timeout <== 30 ==> /sys/block/sdb/device/type <== 0 ==> /sys/block/sdb/device/uevent <== DEVTYPE=scsi_device DRIVER=sd MODALIAS=scsi:t-0x00 ==> /sys/block/sdb/device/vendor <== Multiple flashbench -a /dev/sdb --blocksize=1024 --count=100 align 2147483648 pre 1.31ms on 1.73ms post 1.25ms diff 456µs align 1073741824 pre 1.3ms on 1.76ms post 1.24ms diff 485µs align 536870912 pre 1.28ms on 1.79ms post 1.32ms diff 491µs align 268435456 pre 1.24ms on 1.68ms post 1.23ms diff 444µs align 134217728 pre 1.3ms on 1.82ms post 1.3ms diff 518µs align 67108864 pre 1.3ms on 1.77ms post 1.25ms diff 488µs align 33554432 pre 1.02ms on 1.34ms post 1.01ms diff 327µs align 16777216 pre 1.01ms on 1.35ms post 989µs diff 348µs align 8388608 pre 974µs on 1.35ms post 1.01ms diff 361µs align 4194304 pre 1.25ms on 1.71ms post 1.03ms diff 568µs align 2097152 pre 1.29ms on 1.44ms post 1.26ms diff 160µs align 1048576 pre 1.25ms on 1.44ms post 1.3ms diff 162µs align 524288 pre 1.31ms on 1.44ms post 1.26ms diff 153µs align 262144 pre 1.25ms on 1.42ms post 1.29ms diff 155µs align 131072 pre 1.28ms on 1.43ms post 1.26ms diff 167µs align 65536 pre 1.25ms on 1.43ms post 1.29ms diff 160µs align 32768 pre 1.28ms on 1.43ms post 1.26ms diff 165µs align 16384 pre 1.24ms on 1.43ms post 1.29ms diff 168µs align 8192 pre 1.25ms on 1.31ms post 1.25ms diff 56.5µs align 4096 pre 1.19ms on 1.34ms post 1.25ms diff 118µs align 2048 pre 1.2ms on 1.25ms post 1.2ms diff 51.8µs # Maybe this card has 4 MiB of Erased Block and 16 kiB of Page? flashbench -a /dev/sdb --blocksize=1024 --count=100 align 2147483648 pre 1.31ms on 1.73ms post 1.25ms diff 450µs align 1073741824 pre 1.3ms on 1.76ms post 1.24ms diff 491µs align 536870912 pre 1.28ms on 1.79ms post 1.32ms diff 484µs align 268435456 pre 1.25ms on 1.68ms post 1.23ms diff 435µs align 134217728 pre 1.29ms on 1.82ms post 1.3ms diff 525µs align 67108864 pre 1.3ms on 1.77ms post 1.24ms diff 495µs align 33554432 pre 1.02ms on 1.35ms post 996µs diff 346µs align 16777216 pre 1.02ms on 1.35ms post 995µs diff 341µs align 8388608 pre 974µs on 1.35ms post 994µs diff 368µs align 4194304 pre 1.27ms on 1.71ms post 1.03ms diff 562µs align 2097152 pre 1.31ms on 1.44ms post 1.26ms diff 161µs align 1048576 pre 1.25ms on 1.44ms post 1.3ms diff 164µs align 524288 pre 1.3ms on 1.43ms post 1.26ms diff 156µs align 262144 pre 1.25ms on 1.43ms post 1.29ms diff 162µs align 131072 pre 1.3ms on 1.44ms post 1.26ms diff 157µs align 65536 pre 1.25ms on 1.42ms post 1.27ms diff 159µs align 32768 pre 1.25ms on 1.43ms post 1.24ms diff 182µs align 16384 pre 1.24ms on 1.43ms post 1.27ms diff 178µs align 8192 pre 1.25ms on 1.31ms post 1.24ms diff 67.7µs align 4096 pre 1.19ms on 1.34ms post 1.24ms diff 126µs align 2048 pre 1.19ms on 1.25ms post 1.18ms diff 69.6µs flashbench -a /dev/sdb --blocksize=2048 --count=100 align 2147483648 pre 1.29ms on 1.72ms post 1.25ms diff 448µs align 1073741824 pre 1.28ms on 1.7ms post 1.22ms diff 449µs align 536870912 pre 1.25ms on 1.74ms post 1.29ms diff 473µs align 268435456 pre 1.25ms on 1.66ms post 1.22ms diff 421µs align 134217728 pre 1.28ms on 1.79ms post 1.29ms diff 501µs align 67108864 pre 1.3ms on 1.74ms post 1.26ms diff 466µs align 33554432 pre 1.12ms on 1.51ms post 1.1ms diff 401µs align 16777216 pre 1.09ms on 1.45ms post 949µs diff 427µs align 8388608 pre 1.1ms on 1.46ms post 949µs diff 438µs align 4194304 pre 1.15ms on 1.6ms post 1.07ms diff 487µs align 2097152 pre 1.16ms on 1.28ms post 1.15ms diff 126µs align 1048576 pre 1.15ms on 1.28ms post 1.16ms diff 126µs align 524288 pre 1.16ms on 1.28ms post 1.15ms diff 123µs align 262144 pre 1.15ms on 1.28ms post 1.16ms diff 123µs align 131072 pre 1.16ms on 1.28ms post 1.15ms diff 130µs align 65536 pre 1.15ms on 1.28ms post 1.16ms diff 122µs align 32768 pre 1.16ms on 1.28ms post 1.15ms diff 123µs align 16384 pre 1.15ms on 1.28ms post 1.16ms diff 122µs align 8192 pre 1.13ms on 1.17ms post 1.13ms diff 39.8µs align 4096 pre 1.13ms on 1.17ms post 1.13ms diff 41.5µs flashbench -a /dev/sdb --blocksize=2048 --count=100 align 2147483648 pre 1.69ms on 2.11ms post 1.58ms diff 479µs align 1073741824 pre 1.67ms on 2.1ms post 1.63ms diff 452µs align 536870912 pre 1.65ms on 2.15ms post 1.68ms diff 486µs align 268435456 pre 1.59ms on 2.01ms post 1.49ms diff 469µs align 134217728 pre 1.69ms on 2.19ms post 1.7ms diff 499µs align 67108864 pre 1.68ms on 2.15ms post 1.59ms diff 517µs align 33554432 pre 1.39ms on 1.78ms post 1.38ms diff 394µs align 16777216 pre 1.27ms on 1.68ms post 990µs diff 551µs align 8388608 pre 1.26ms on 1.68ms post 985µs diff 555µs align 4194304 pre 1.38ms on 1.88ms post 1.29ms diff 543µs align 2097152 pre 1.44ms on 1.6ms post 1.44ms diff 155µs align 1048576 pre 1.44ms on 1.58ms post 1.48ms diff 122µs align 524288 pre 1.48ms on 1.6ms post 1.43ms diff 140µs align 262144 pre 1.44ms on 1.6ms post 1.48ms diff 143µs align 131072 pre 1.48ms on 1.59ms post 1.43ms diff 140µs align 65536 pre 1.43ms on 1.56ms post 1.48ms diff 110µs align 32768 pre 1.47ms on 1.58ms post 1.43ms diff 129µs align 16384 pre 1.43ms on 1.59ms post 1.47ms diff 137µs align 8192 pre 1.41ms on 1.48ms post 1.41ms diff 73.5µs align 4096 pre 1.41ms on 1.48ms post 1.41ms diff 67.4µs flashbench -f /dev/sdb 4MiB 5.02M/s 8.23M/s 2.39M/s 5.04M/s 10.4M/s 2.08M/s 2MiB 4.64M/s 17.1M/s 4.91M/s 4.41M/s 5.01M/s 4.51M/s 1MiB 4.98M/s 13.9M/s 4.69M/s 4.98M/s 4.72M/s 1.75M/s 512KiB 4.74M/s 16.9M/s 4.98M/s 4.74M/s 4.78M/s 15M/s 256KiB 4.99M/s 13.4M/s 4.93M/s 4.71M/s 1.99M/s 4.97M/s 128KiB 4.74M/s 14.1M/s 4.53M/s 4.96M/s 4.38M/s 4.99M/s 64KiB 4.73M/s 13.3M/s 4.92M/s 4.76M/s 2.03M/s 4.9M/s 32KiB 4.41M/s 15.1M/s 4.9M/s 4.42M/s 4.96M/s 4.68M/s 16KiB 4.58M/s 11M/s 4.78M/s 4M/s 4.83M/s 3.39M/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=1 4MiB 14.9M/s 2MiB 17.9M/s 1MiB 18.5M/s 512KiB 18.1M/s 256KiB 18.1M/s 128KiB 17.6M/s 64KiB 17.3M/s 32KiB 16M/s 16KiB 13.2M/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=2 4MiB 16.4M/s 2MiB 17.8M/s 1MiB 17.8M/s 512KiB 17.1M/s 256KiB 16.3M/s 128KiB 15.1M/s 64KiB 14M/s 32KiB 11.3M/s 16KiB 8.04M/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=3 4MiB 17.4M/s 2MiB 18.2M/s 1MiB 17.7M/s 512KiB 17.1M/s 256KiB 16M/s 128KiB 15.3M/s 64KiB 14M/s 32KiB 11.2M/s 16KiB 7.92M/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=4 4MiB 10.9M/s 2MiB 5.98M/s 1MiB 9.38M/s 512KiB 7.03M/s 256KiB 6.67M/s 128KiB 6.8M/s 64KiB 8.36M/s 32KiB 7.11M/s 16KiB 5.92M/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=5 4MiB 6.5M/s 2MiB 4.62M/s 1MiB 3.2M/s 512KiB 3.41M/s 256KiB 3.25M/s 128KiB 2.83M/s 64KiB 4.41M/s 32KiB 6.06M/s 16KiB 3.52M/s With --random parameter: flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=1 4MiB 15.8M/s 2MiB 17.8M/s 1MiB 18M/s 512KiB 15.7M/s 256KiB 8.44M/s 128KiB 3.01M/s 64KiB 1.45M/s 32KiB 719K/s 16KiB 343K/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=2 4MiB 13.9M/s 2MiB 17.8M/s 1MiB 17.8M/s 512KiB 15.5M/s 256KiB 8.48M/s 128KiB 2.99M/s 64KiB 1.45M/s 32KiB 718K/s 16KiB 342K/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=3 4MiB 7.17M/s 2MiB 17.9M/s 1MiB 17.1M/s 512KiB 15.5M/s 256KiB 8.36M/s 128KiB 3.01M/s 64KiB 1.45M/s 32KiB 718K/s 16KiB 343K/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=4 4MiB 8.54M/s 2MiB 5.46M/s 1MiB 9.28M/s 512KiB 4.51M/s 256KiB 3.65M/s 128KiB 1.43M/s 64KiB 745K/s 32KiB 441K/s 16KiB 254K/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=5 4MiB 5.46M/s 2MiB 5.01M/s 1MiB 4.92M/s 512KiB 2.16M/s 256KiB 1.32M/s 128KiB 799K/s 64KiB 432K/s 32KiB 246K/s 16KiB 177K/s I think that the Erased Block has 4 MiB and each Page has 16 kiB, but the open-au it's only 1 or maybe 2, I don't know. Is that correct? I want use F2FS in this card, but I don't know if this card is good for this, and I don't know too how to alignment correctly with F2FS, using mkfs.f2fs. Sérgio Benjamim

13 years, 2 months

Samsung MB-MP8GB 8 GB microSDHC

by Andrew Bradford

This is a "Plus" card but rated class 4 unlike the MB-MP8GA that looks almost identical. The coloring and logos almost match except for the class marks. This card's internals are different. MB-MP8GA results for comparison: http://lists.linaro.org/pipermail/flashbench-results/2012-August/000322.html andrew@brick:~/git/flashbench$ head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 1b534d30303030301004b2901000cc00 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900003ac57f800a400000 ==> /sys/block/mmcblk0/device/date <== 12/2012 ==> /sys/block/mmcblk0/device/driver <== ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/manfid <== 0x00001b ==> /sys/block/mmcblk0/device/name <== 00000 ==> /sys/block/mmcblk0/device/oemid <== 0x534d ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235800300000000 ==> /sys/block/mmcblk0/device/serial <== 0x04b29010 ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=00000 MODALIAS=mmc:block andrew@brick:~/git/flashbench$ sudo fdisk -l /dev/mmcblk0[sudo] password for andrew: Disk /dev/mmcblk0: 7888 MB, 7888437248 bytes, 15407104 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 label type: dos Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/mmcblk0p1 8192 15407103 7699456 b W95 FAT32 andrew@brick:~/git/flashbench$ factor 7888437248 7888437248: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 7523 andrew@brick:~/git/flashbench$ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 --count=100 align 2147483648 pre 510µs on 753µs post 599µs diff 199µs align 1073741824 pre 495µs on 723µs post 584µs diff 183µs align 536870912 pre 501µs on 746µs post 555µs diff 218µs align 268435456 pre 501µs on 728µs post 592µs diff 182µs align 134217728 pre 490µs on 713µs post 583µs diff 177µs align 67108864 pre 485µs on 703µs post 553µs diff 184µs align 33554432 pre 498µs on 706µs post 582µs diff 166µs align 16777216 pre 492µs on 705µs post 576µs diff 171µs align 8388608 pre 491µs on 702µs post 573µs diff 170µs align 4194304 pre 489µs on 697µs post 571µs diff 168µs align 2097152 pre 485µs on 700µs post 573µs diff 171µs align 1048576 pre 488µs on 702µs post 544µs diff 186µs align 524288 pre 489µs on 703µs post 545µs diff 186µs align 262144 pre 491µs on 703µs post 546µs diff 185µs align 131072 pre 487µs on 699µs post 574µs diff 169µs align 65536 pre 473µs on 700µs post 547µs diff 190µs align 32768 pre 480µs on 719µs post 576µs diff 192µs align 16384 pre 473µs on 691µs post 571µs diff 169µs align 8192 pre 479µs on 679µs post 558µs diff 160µs align 4096 pre 552µs on 554µs post 543µs diff 6.32µs align 2048 pre 569µs on 571µs post 560µs diff 6.49µs ## 8 kiB pages, unclear erase block but should be power of 2 based off factor andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --open-au-nr=1 4MiB 8.23M/s 2MiB 8.39M/s 1MiB 8.25M/s 512KiB 8.23M/s 256KiB 8.22M/s 128KiB 8.2M/s 64KiB 8.08M/s 32KiB 7.1M/s 16KiB 5.89M/s 8KiB 3.81M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --open-au-nr=2 4MiB 8.33M/s 2MiB 8.18M/s 1MiB 8.19M/s 512KiB 8.24M/s 256KiB 7.95M/s 128KiB 7.77M/s 64KiB 7.33M/s 32KiB 5.86M/s 16KiB 4.4M/s 8KiB 2.62M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --open-au-nr=3 4MiB 8.23M/s 2MiB 8.17M/s 1MiB 8.27M/s 512KiB 8.34M/s 256KiB 8.3M/s 128KiB 8.01M/s 64KiB 7.53M/s 32KiB 5.96M/s 16KiB 4.29M/s 8KiB 2.46M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --open-au-nr=4 4MiB 3.85M/s 2MiB 3.82M/s 1MiB 2.95M/s 512KiB 2.96M/s ^C ## 3 linear open-au, poor compared to the MB-MP8GA's 7 andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --random --open-au-nr=1 4MiB 6.56M/s 2MiB 8.71M/s 1MiB 8.24M/s 512KiB 8.46M/s 256KiB 8.41M/s 128KiB 8.29M/s 64KiB 7.71M/s 32KiB 6.72M/s 16KiB 5.13M/s 8KiB 3.12M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --random --open-au-nr=2 4MiB 8.57M/s 2MiB 7.98M/s 1MiB 8.41M/s 512KiB 8.4M/s 256KiB 8.34M/s 128KiB 8.07M/s 64KiB 7.46M/s 32KiB 6.06M/s 16KiB 4.35M/s 8KiB 2.47M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --random --open-au-nr=3 4MiB 6.56M/s 2MiB 8.1M/s 1MiB 8.46M/s 512KiB 8.39M/s 256KiB 8.3M/s 128KiB 8.07M/s 64KiB 7.57M/s 32KiB 6.01M/s 16KiB 4.26M/s 8KiB 2.52M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --random --open-au-nr=4 4MiB 6.73M/s 2MiB 7.87M/s 1MiB 8.38M/s 512KiB 8.36M/s 256KiB 8.25M/s 128KiB 7.98M/s 64KiB 7.49M/s 32KiB 5.91M/s 16KiB 4.38M/s 8KiB 2.66M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --random --open-au-nr=5 4MiB 4.68M/s 2MiB 3.97M/s 1MiB 1.67M/s ^C ## 4 random open-au, which is more than the linear. ## I must have the erase block size wrong or something. ## Regardless, that's not very good compared to MB-MS8GA. andrew@brick:~/git/flashbench$ sudo ./flashbench --find-fat /dev/mmcblk04MiB 2.82M/s 4.66M/s 4.76M/s 3.14M/s 4.78M/s 4.82M/s 2MiB 3.23M/s 4.78M/s 4.8M/s 3.26M/s 4.74M/s 4.78M/s 1MiB 3.27M/s 4.77M/s 4.79M/s 3.23M/s 4.78M/s 4.79M/s 512KiB 3.27M/s 4.79M/s 4.72M/s 3.23M/s 4.78M/s 4.75M/s 256KiB 3.24M/s 4.79M/s 4.78M/s 3.27M/s 4.78M/s 4.73M/s 128KiB 3.26M/s 4.78M/s 4.78M/s 3.24M/s 4.77M/s 4.81M/s 64KiB 3.26M/s 4.76M/s 4.7M/s 3.24M/s 4.74M/s 4.75M/s 32KiB 3.03M/s 4.32M/s 4.34M/s 3.06M/s 4.36M/s 4.31M/s 16KiB 2.74M/s 3.8M/s 3.74M/s 2.72M/s 3.79M/s 3.76M/s

13 years, 2 months

Samsung MB-MS8GB 8GB microSDHC

by Andrew Bradford

andrew@brick:~/git/flashbench$ head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 1b534d303030303010592232db00d600 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900003a917f800a400000 ==> /sys/block/mmcblk0/device/date <== 06/2013 ==> /sys/block/mmcblk0/device/driver <== ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/manfid <== 0x00001b ==> /sys/block/mmcblk0/device/name <== 00000 ==> /sys/block/mmcblk0/device/oemid <== 0x534d ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235000000000000 ==> /sys/block/mmcblk0/device/serial <== 0x592232db ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=00000 MODALIAS=mmc:block andrew@brick:~/git/flashbench$ sudo fdisk -l /dev/mmcblk0 Disk /dev/mmcblk0: 7861 MB, 7861174272 bytes, 15353856 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 label type: dos Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/mmcblk0p1 8192 15353855 7672832 b W95 FAT32 andrew@brick:~/git/flashbench$ factor 7861174272 7861174272: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 7 7 17 andrew@brick:~/git/flashbench$ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 --count=100 align 2147483648 pre 391µs on 476µs post 453µs diff 54.1µs align 1073741824 pre 394µs on 478µs post 454µs diff 54.7µs align 536870912 pre 392µs on 477µs post 454µs diff 54µs align 268435456 pre 391µs on 476µs post 453µs diff 53.3µs align 134217728 pre 383µs on 460µs post 469µs diff 34.3µs align 67108864 pre 366µs on 444µs post 451µs diff 35.4µs align 33554432 pre 366µs on 443µs post 451µs diff 34.8µs align 16777216 pre 366µs on 444µs post 451µs diff 35.7µs align 8388608 pre 374µs on 463µs post 461µs diff 45.1µs align 4194304 pre 373µs on 466µs post 458µs diff 50.6µs align 2097152 pre 385µs on 480µs post 472µs diff 51µs align 1048576 pre 383µs on 481µs post 476µs diff 51.1µs align 524288 pre 383µs on 452µs post 471µs diff 24.5µs align 262144 pre 380µs on 451µs post 475µs diff 23.7µs align 131072 pre 383µs on 451µs post 471µs diff 24µs align 65536 pre 382µs on 451µs post 474µs diff 23.2µs align 32768 pre 384µs on 451µs post 469µs diff 24.6µs align 16384 pre 381µs on 451µs post 475µs diff 23µs align 8192 pre 379µs on 445µs post 465µs diff 22.8µs align 4096 pre 427µs on 422µs post 415µs diff 764ns align 2048 pre 450µs on 445µs post 439µs diff 671ns ## Looks like 1 MiB erase blocks andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --open-au-nr=1 1MiB 2.94M/s 512KiB 4.96M/s 256KiB 7.78M/s 128KiB 8.53M/s 64KiB 4.25M/s 32KiB 3.16M/s 16KiB 6.13M/s 8KiB 4.25M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --open-au-nr=2 1MiB 2.51M/s 512KiB 8.78M/s 256KiB 8.7M/s 128KiB 8.74M/s 64KiB 8.64M/s 32KiB 8.2M/s 16KiB 6.77M/s 8KiB 4.27M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --open-au-nr=3 1MiB 1.67M/s 512KiB 1.63M/s 256KiB 1.07M/s 128KiB 517K/s 64KiB 397K/s 32KiB 366K/s 16KiB 364K/s 8KiB 2.61M/s ## 2 linear open-au andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --random --open-au-nr=1 1MiB 1.51M/s 512KiB 7.85M/s 256KiB 8.61M/s 128KiB 1.66M/s 64KiB 7.54M/s 32KiB 7.97M/s 16KiB 6.51M/s 8KiB 4.09M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --random --open-au-nr=2 1MiB 8.72M/s 512KiB 8.81M/s 256KiB 8.55M/s 128KiB 8.71M/s 64KiB 8.59M/s 32KiB 8.15M/s 16KiB 6.5M/s 8KiB 4.13M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --random --open-au-nr=3 1MiB 1.7M/s 512KiB 1.31M/s 256KiB 936K/s 128KiB 635K/s 64KiB 384K/s 32KiB 360K/s 16KiB 364K/s 8KiB 2.15M/s ## 2 open-au random andrew@brick:~/git/flashbench$ sudo ./flashbench --find-fat --erasesize=$[1024*1024] /dev/mmcblk0 1MiB 5.03M/s 4.93M/s 4.92M/s 6.34M/s 7.43M/s 7.46M/s 512KiB 6.91M/s 6.23M/s 6.18M/s 5.04M/s 6.23M/s 6.25M/s 256KiB 5.06M/s 6.2M/s 6.25M/s 4.94M/s 6.14M/s 6.2M/s 128KiB 5.04M/s 6.19M/s 6.19M/s 4.99M/s 6.2M/s 6.23M/s 64KiB 4.95M/s 6.19M/s 6.12M/s 4.99M/s 6.15M/s 6.26M/s 32KiB 4.16M/s 4.89M/s 4.79M/s 5.79M/s 7.63M/s 8.41M/s 16KiB 6.57M/s 6.52M/s 6.57M/s 6.58M/s 6.52M/s 6.45M/s andrew@brick:~/git/flashbench$ sudo ./flashbench --find-fat --erasesize=$[1024*1024] --fat-nr=16 /dev/mmcblk0 1MiB 5.08M/s 4.94M/s 4.9M/s 6.36M/s 7.45M/s 7.57M/s 6.4M/s 6.03M/s 6.24M/s 5.44M/s 6.27M/s 6.17M/s 5.47M/s 6.25M/s 6.17M/s 5.36M/s 512KiB 6.04M/s 6.21M/s 7.21M/s 4.08M/s 2.82M/s 4.09M/s 4.64M/s 5.3M/s 6.04M/s 6.23M/s 5.46M/s 6.23M/s 6.19M/s 5.39M/s 6.26M/s 6.14M/s 256KiB 5.4M/s 6.27M/s 6.27M/s 3.85M/s 2.84M/s 4.02M/s 4.78M/s 5.17M/s 6.26M/s 6.21M/s 5.47M/s 6.17M/s 6.26M/s 5.4M/s 6.2M/s 6.27M/s 128KiB 4.66M/s 6.27M/s 6.21M/s 3.89M/s 2.79M/s 4.15M/s 4.71M/s 5.31M/s 6.19M/s 6.24M/s 5.46M/s 6.05M/s 6.25M/s 5.51M/s 6.24M/s 6.21M/s 64KiB 5.44M/s 6.24M/s 6.13M/s 3.79M/s 2.82M/s 4.06M/s 4.71M/s 5.26M/s 6.28M/s 6.27M/s 5.42M/s 6.21M/s 6.27M/s 5.45M/s 6.15M/s 6.24M/s 32KiB 4.38M/s 4.71M/s 4.83M/s 6.78M/s 8.47M/s 8.43M/s 8.44M/s 8.14M/s 8.28M/s 8.66M/s 8.85M/s 8.36M/s 3.9M/s 2.77M/s 4.15M/s 4.7M/s 16KiB 2.46M/s 3.57M/s 5.92M/s 6.44M/s 6.43M/s 6.38M/s 6.4M/s 6.43M/s 6.43M/s 6.84M/s 6.83M/s 6.86M/s 4.89M/s 3.35M/s 3.28M/s 4.76M/s ## No special fat area really stands out

13 years, 2 months

Samsung MB-MS4GB 4 GB microSDHC

by Andrew Bradford

andrew@brick:~/git/flashbench$ head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 1b534d30303030301091ce109c00d500 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900001d4d7f800a400000 ==> /sys/block/mmcblk0/device/date <== 05/2013 ==> /sys/block/mmcblk0/device/driver <== ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/manfid <== 0x00001b ==> /sys/block/mmcblk0/device/name <== 00000 ==> /sys/block/mmcblk0/device/oemid <== 0x534d ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235000000000000 ==> /sys/block/mmcblk0/device/serial <== 0x91ce109c ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=00000 MODALIAS=mmc:block andrew@brick:~/git/flashbench$ sudo fdisk -l /dev/mmcblk0 Disk /dev/mmcblk0: 3933 MB, 3933208576 bytes, 7682048 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 label type: dos Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/mmcblk0p1 8192 7682047 3836928 b W95 FAT32 andrew@brick:~/git/flashbench$ factor 3933208576 3933208576: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 11 11 31 andrew@brick:~/git/flashbench$ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 --count=100 align 1073741824 pre 336µs on 423µs post 408µs diff 50.8µs align 536870912 pre 341µs on 424µs post 417µs diff 45.4µs align 268435456 pre 330µs on 410µs post 405µs diff 42.8µs align 134217728 pre 324µs on 399µs post 407µs diff 33.5µs align 67108864 pre 325µs on 399µs post 408µs diff 32.6µs align 33554432 pre 325µs on 399µs post 407µs diff 32.8µs align 16777216 pre 325µs on 399µs post 408µs diff 32.4µs align 8388608 pre 331µs on 416µs post 415µs diff 42.7µs align 4194304 pre 340µs on 424µs post 425µs diff 41.6µs align 2097152 pre 341µs on 430µs post 422µs diff 48.9µs align 1048576 pre 337µs on 430µs post 427µs diff 48µs align 524288 pre 340µs on 402µs post 423µs diff 21µs align 262144 pre 335µs on 402µs post 426µs diff 21.2µs align 131072 pre 339µs on 402µs post 421µs diff 21.4µs align 65536 pre 336µs on 402µs post 426µs diff 20.8µs align 32768 pre 339µs on 401µs post 423µs diff 20.2µs align 16384 pre 336µs on 401µs post 424µs diff 20.6µs align 8192 pre 336µs on 394µs post 418µs diff 17.5µs align 4096 pre 381µs on 377µs post 370µs diff 877ns align 2048 pre 405µs on 400µs post 394µs diff 1.01µs ## 1 MiB erase blocks andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --open-au-nr=1 1MiB 3.07M/s 512KiB 4.7M/s 256KiB 8.76M/s 128KiB 8.59M/s 64KiB 5.31M/s 32KiB 3.01M/s 16KiB 6.89M/s 8KiB 4.46M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --open-au-nr=2 1MiB 8.93M/s 512KiB 8.88M/s 256KiB 8.91M/s 128KiB 8.91M/s 64KiB 8.8M/s 32KiB 8.53M/s 16KiB 6.77M/s 8KiB 4.43M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --open-au-nr=3 1MiB 3.02M/s 512KiB 1.87M/s 256KiB 1.19M/s 128KiB 630K/s 64KiB 406K/s 32KiB 408K/s 16KiB 398K/s 8KiB 2.09M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --random --open-au-nr=1 1MiB 9.01M/s 512KiB 8.97M/s 256KiB 1.72M/s 128KiB 8.94M/s 64KiB 8.91M/s 32KiB 8.72M/s 16KiB 7.04M/s 8KiB 4.59M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --random --open-au-nr=2 1MiB 8.2M/s 512KiB 8.95M/s 256KiB 8.89M/s 128KiB 8.86M/s 64KiB 8.67M/s 32KiB 8.35M/s 16KiB 6.64M/s 8KiB 4.22M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --random --open-au-nr=3 1MiB 1.81M/s 512KiB 1.45M/s 256KiB 1.02M/s 128KiB 689K/s 64KiB 439K/s 32KiB 390K/s 16KiB 397K/s 8KiB 2.46M/s ## 2 open-au linear and random andrew@brick:~/git/flashbench$ sudo ./flashbench --find-fat --erasesize=$[1024*1024] --fat-nr=16 /dev/mmcblk0 1MiB 1.75M/s 8.97M/s 8.8M/s 1.7M/s 5.05M/s 5.5M/s 6.44M/s 6.57M/s 6.43M/s 6.4M/s 6.67M/s 6.36M/s 6.5M/s 6.67M/s 6.33M/s 6.45M/s 512KiB 6.47M/s 6.36M/s 8.92M/s 4.34M/s 2.97M/s 4.66M/s 5.03M/s 6.03M/s 6.57M/s 6.65M/s 6.26M/s 6.65M/s 6.57M/s 6.32M/s 6.68M/s 6.49M/s 256KiB 6.21M/s 6.62M/s 6.61M/s 4.3M/s 2.97M/s 4.57M/s 4.98M/s 5.99M/s 6.65M/s 6.65M/s 6.28M/s 6.53M/s 6.66M/s 6.19M/s 6.53M/s 6.63M/s 128KiB 6.07M/s 6.52M/s 6.62M/s 4.35M/s 2.95M/s 4.4M/s 5.01M/s 5.9M/s 6.6M/s 6.51M/s 6.14M/s 6.6M/s 6.67M/s 6.24M/s 6.67M/s 6.68M/s 64KiB 6.14M/s 6.6M/s 6.61M/s 4.42M/s 2.96M/s 4.35M/s 4.98M/s 5.88M/s 6.49M/s 6.58M/s 6.13M/s 6.53M/s 6.47M/s 6.18M/s 6.56M/s 6.48M/s 32KiB 4.8M/s 4.98M/s 4.99M/s 7.08M/s 8.27M/s 7.97M/s 7.63M/s 8.17M/s 8.23M/s 8.34M/s 8.41M/s 8.11M/s 4.08M/s 2.91M/s 4.57M/s 4.86M/s 16KiB 2.65M/s 3.71M/s 6.54M/s 6.54M/s 6.51M/s 6.6M/s 6.68M/s 6.52M/s 6.53M/s 6.79M/s 6.83M/s 7M/s 5.19M/s 3.45M/s 3.38M/s 5.21M/s

13 years, 2 months

Sandisk Cruzer 32G

by Jean-René Reinhard

Tests for Sandisk 32G usb flash drive. $ lsusb Bus 002 Device 003: ID 0781:5530 SanDisk Corp. Cruzer $ fdisk -l /dev/sdc Disk /dev/sdc: 32.0 GB, 32015679488 bytes 255 têtes, 63 secteurs/piste, 3892 cylindres, total 62530624 secteurs Unités = secteurs de 1 * 512 = 512 octets Taille de secteur (logique / physique) : 512 octets / 512 octets taille d'E/S (minimale / optimale) : 512 octets / 512 octets Identifiant de disque : 0x00000000 Périphérique Amorce Début Fin Blocs Id Système /dev/sdc1 * 32 62530623 31265296 c W95 FAT32 (LBA) $ ./flashbench -a /dev/sdc --blocksize=1024 align 8589934592 pre 931µs on 1.44ms post 811µs diff 565µs align 4294967296 pre 894µs on 1.58ms post 770µs diff 750µs align 2147483648 pre 878µs on 1.59ms post 791µs diff 756µs align 1073741824 pre 946µs on 1.75ms post 896µs diff 825µs align 536870912 pre 942µs on 1.69ms post 909µs diff 766µs align 268435456 pre 901µs on 1.58ms post 851µs diff 708µs align 134217728 pre 937µs on 1.65ms post 882µs diff 741µs align 67108864 pre 902µs on 1.63ms post 842µs diff 760µs align 33554432 pre 898µs on 1.62ms post 842µs diff 751µs align 16777216 pre 878µs on 1.63ms post 911µs diff 737µs align 8388608 pre 884µs on 1.62ms post 890µs diff 734µs align 4194304 pre 858µs on 1.42ms post 786µs diff 597µs align 2097152 pre 869µs on 923µs post 882µs diff 47.6µs align 1048576 pre 879µs on 917µs post 866µs diff 45µs align 524288 pre 844µs on 881µs post 844µs diff 37µs align 262144 pre 842µs on 890µs post 846µs diff 45.9µs align 131072 pre 839µs on 884µs post 846µs diff 41.6µs align 65536 pre 846µs on 880µs post 829µs diff 42.6µs align 32768 pre 841µs on 897µs post 841µs diff 55.7µs align 16384 pre 842µs on 878µs post 884µs diff 14.7µs align 8192 pre 843µs on 854µs post 844µs diff 10µs align 4096 pre 846µs on 848µs post 845µs diff 2.42µs align 2048 pre 845µs on 846µs post 846µs diff 658ns $ ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256* 1024] /dev/sdc --open-au-nr=7 4MiB 23M/s 2MiB 22.8M/s 1MiB 22.8M/s 512KiB 22.5M/s 256KiB 21.5M/s $ ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256* 1024] /dev/sdc --open-au-nr=8 4MiB 15.2M/s 2MiB 22.8M/s 1MiB 22.7M/s 512KiB 22.4M/s 256KiB 21.5M/s $ ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256* 1024] /dev/sdc --open-au-nr=9 4MiB 23M/s 2MiB 22.8M/s 1MiB 22.7M/s 512KiB 22.5M/s 256KiB 21.4M/s $ ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256* 1024] /dev/sdc --open-au-nr=10 4MiB 10.4M/s 2MiB 6.93M/s 1MiB 5.95M/s 512KiB 6.06M/s 256KiB 5.81M/s $ ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256* 1024] /dev/sdc --random --open-au-nr=9 4MiB 23M/s 2MiB 22.8M/s 1MiB 22.7M/s 512KiB 21.3M/s 256KiB 10.5M/s $ ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256* 1024] /dev/sdc --random --open-au-nr=10 4MiB 9.56M/s 2MiB 6.94M/s 1MiB 3.92M/s 512KiB 3.82M/s 256KiB 2.23M/s $ ./flashbench -f /dev/sdc --erasesize=$[4* 1024 * 1024] --blocksize=512 --random 4MiB 22.9M/s 23.1M/s 22.9M/s 23.1M/s 23.2M/s 23.2M/s 2MiB 23.2M/s 23.1M/s 23.1M/s 23.1M/s 23.1M/s 23M/s 1MiB 23M/s 23M/s 23M/s 23M/s 23M/s 22.9M/s 512KiB 21.5M/s 21.5M/s 21.6M/s 21.6M/s 21.5M/s 21.4M/s 256KiB 10.6M/s 10.7M/s 10.6M/s 10.6M/s 10.6M/s 10.6M/s 128KiB 2.89M/s 2.9M/s 2.85M/s 2.89M/s 2.9M/s 2.89M/s 64KiB 1.2M/s 1.21M/s 1.2M/s 1.2M/s 1.2M/s 1.2M/s 32KiB 601K/s 604K/s 603K/s 601K/s 604K/s 601K/s 16KiB 305K/s 306K/s 305K/s 304K/s 305K/s 304K/s 8KiB 1.62M/s 1.65M/s 1.64M/s 1.65M/s 1.64M/s 1.65M/s 4KiB 1.45M/s 1.46M/s 1.46M/s 1.45M/s 1.44M/s 1.43M/s 2KiB 729K/s 729K/s 722K/s 733K/s 732K/s 726K/s 1KiB 366K/s 365K/s 366K/s 364K/s 365K/s 362K/s 512B 172K/s 172K/s 171K/s 172K/s 171K/s 169K/s # For completeness sake $ ./flashbench -f /dev/sdc --erasesize=$[1024 * 1024] --blocksize=512 --random 1MiB 21M/s 22M/s 21.8M/s 23.2M/s 22M/s 21.9M/s 512KiB 20.7M/s 20.2M/s 15.2M/s 21.3M/s 21.2M/s 19.8M/s 256KiB 6.49M/s 7.91M/s 10.2M/s 6.66M/s 6.51M/s 18M/s 128KiB 3.36M/s 2.46M/s 4.96M/s 3.59M/s 3.37M/s 3.37M/s 64KiB 1.06M/s 1.45M/s 971K/s 1.15M/s 1.05M/s 1.39M/s 32KiB 633K/s 732K/s 566K/s 671K/s 633K/s 668K/s 16KiB 343K/s 327K/s 346K/s 339K/s 345K/s 341K/s 8KiB 1.05M/s 1.25M/s 1.18M/s 1.21M/s 985K/s 1.47M/s 4KiB 1.51M/s 1.56M/s 1.25M/s 1.55M/s 1.47M/s 1.35M/s 2KiB 816K/s 788K/s 793K/s 720K/s 809K/s 809K/s 1KiB 360K/s 390K/s 391K/s 363K/s 358K/s 388K/s 512B 172K/s 180K/s 172K/s 179K/s 172K/s 180K/s So my guess is erase block size = 4Mo, the page size seems to be 4K. Am I missing something? Are further test needed to characterize the USB stick? I plan to put an ext4 and a VFAT partition on this usb stick. Do I need to take steps further than ensuring an alignment of 4M boundaries to ensure proper use (e.g., adapt pagesize or cluster size of the filesystems)? Also, I wonder why -f tests show such poor performance for 32Kib and 16Kib and 8Kib compared to 4Kib. Best wishes, Jean-René Reinhard

13 years, 2 months

PNY Attache Micro Sleek 8GB USB Flash Drive

by Ahau ＠porteus.org

Hi, I grabbed a new flash drive yesterday, so I'm trying to sort out the eraseblock size to format it properly. I grabbed this one because it was on sale and has a small form factor. I'm planning to format half of it as swap so that I can plug it in to my tegra 2 tablet while compiling software that requires additional RAM (seamonkey and firefox at least require extra RAM for linking libxul and I don't want to swap a lot on my internal flash or sdcard). Anyway, here's what I got from fdisk and flashbench: Disk /dev/sdc: 8166 MB, 8166703104 bytes 256 heads, 63 sectors/track, 989 cylinders, total 15950592 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/sdc1 * 56 15950591 7975268 c W95 FAT32 (LBA) root@porteus:~/Downloads/flashbench-2e30b19# ./flashbench -a /dev/sdc --blocksize=1024 align 2147483648 pre 494µs on 491µs post 494µs diff -2812ns align 1073741824 pre 487µs on 491µs post 491µs diff 1.68µs align 536870912 pre 491µs on 492µs post 493µs diff 204ns align 268435456 pre 507µs on 528µs post 511µs diff 19.4µs align 134217728 pre 507µs on 526µs post 510µs diff 17.5µs align 67108864 pre 508µs on 524µs post 505µs diff 17.8µs align 33554432 pre 508µs on 547µs post 507µs diff 39.3µs align 16777216 pre 494µs on 510µs post 494µs diff 16.5µs align 8388608 pre 511µs on 531µs post 508µs diff 21.6µs align 4194304 pre 505µs on 530µs post 507µs diff 24µs align 2097152 pre 507µs on 526µs post 508µs diff 17.8µs align 1048576 pre 509µs on 534µs post 513µs diff 22.9µs align 524288 pre 508µs on 529µs post 507µs diff 21.5µs align 262144 pre 508µs on 527µs post 508µs diff 19µs align 131072 pre 510µs on 525µs post 512µs diff 13.9µs align 65536 pre 511µs on 531µs post 512µs diff 19.1µs align 32768 pre 509µs on 530µs post 506µs diff 22.1µs align 16384 pre 506µs on 531µs post 507µs diff 24.4µs align 8192 pre 505µs on 509µs post 511µs diff 1.13µs align 4096 pre 506µs on 509µs post 504µs diff 4.08µs align 2048 pre 509µs on 508µs post 506µs diff 882ns root@porteus:~/Downloads/flashbench-2e30b19# ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdc 4MiB 26.1M/s 2MiB 22.6M/s 1MiB 22.9M/s 512KiB 21M/s 256KiB 19.9M/s root@porteus:~/Downloads/flashbench-2e30b19# ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdc --open-au-nr=2 4MiB 22.8M/s 2MiB 22.8M/s 1MiB 22.8M/s 512KiB 21.7M/s 256KiB 19.8M/s root@porteus:~/Downloads/flashbench-2e30b19# ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdc --open-au-nr=3 4MiB 10.4M/s 2MiB 10.2M/s 1MiB 23.3M/s 512KiB 21.2M/s 256KiB 20.2M/s root@porteus:~/Downloads/flashbench-2e30b19# ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdc --open-au-nr=4 4MiB 4.28M/s 2MiB 2.05M/s 1MiB 2.94M/s 512KiB 2.56M/s 256KiB 2.97M/s root@porteus:~/Downloads/flashbench-2e30b19# root@porteus:/mnt/sdb2/flashbench-2e30b19# ./flashbench -O --erasesize=$[2 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdc --open-au-nr=4 --random 2MiB 2.19M/s 1MiB 1.29M/s 512KiB 1.75M/s ^C^[[A root@porteus:/mnt/sdb2/flashbench-2e30b19# ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdc --open-au-nr=4 --random 4MiB 2.53M/s 2MiB 2.11M/s 1MiB 2.97M/s 512KiB 2.6M/s 256KiB 1.44M/s root@porteus:/mnt/sdb2/flashbench-2e30b19# ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdc --open-au-nr=3 --random 4MiB 4.27M/s 2MiB 6.6M/s 1MiB 10.6M/s 512KiB 6.56M/s 256KiB 10.1M/s root@porteus:/mnt/sdb2/flashbench-2e30b19# ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdc --open-au-nr=2 --random 4MiB 4.9M/s 2MiB 8.12M/s 1MiB 8.43M/s 512KiB 4.91M/s 256KiB 21.5M/s root@porteus:/mnt/sdb2/flashbench-2e30b19# ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdc --open-au-nr=1 --random 4MiB 5.1M/s 2MiB 4.82M/s 1MiB 26.7M/s 512KiB 5.01M/s 256KiB 4.72M/s root@porteus:/mnt/sdb2/flashbench-2e30b19# I had a hard time determining the eraseblock size from the '-a' test; the numbers seemed to keep jumping around on me. I assumed that I was dealing with 4mb eraseblocks (but was kind of a guess on my part, since most of my other devices are 4mb), and testing the open-au's seemed to confirm this (in my mind anyway) as going to 8, 16, or 32 MB erasesizes slowed down quite a bit, even with only one au. I'd consider myself a novice at all of this; if you'd like me to run some additional testing with different parameters, just let me know. For now, I'm assuming 4mb eraseblocks, with no offset (not sure how to confirm that), 16kb page size, with 2 linear and 2 or 3 random au's. Thanks!

13 years, 6 months

Fwd: What are the right fdisk and mkfs.ext4 settings for SanDisk SDSDU-032G-A11?

by Maciej Sieczka

Hello, I've got this SanDisk 32GB SDSDU-032G-A11 uSDHC card [1]. [2] summarizes its features as Allocation Unit = 12 MB, Write Size = 64 KB, Page Size = 16 KB, FAT Location = 4-12 MB. Can you please tell me how these translate into fdisk and mkfs.ext4 settings to format the card as a single ext4 partition having an optimal performance and wear? Regards, Maciek [1] http://lists.linaro.org/pipermail/flashbench-results/2012-June/000303.html [2] https://wiki.linaro.org/WorkingGroups/KernelArchived/Projects/FlashCardSurv… -- Maciej Sieczka http://www.sieczka.org

13 years, 6 months

Samsung 8GB CLASS 6 SDHC "MB-SS8GA"

by Csordás Csaba Ifj.

Hi, here are my results. I only have an external card reader. fdisk -l /dev/disk/by-id/usb-Generic-_SD_MMC_20070818000000000-0\:2 Disk /dev/disk/by-id/usb-Generic-_SD_MMC_20070818000000000-0:2: 7964 MB, 7964983296 bytes 246 heads, 62 sectors/track, 1019 cylinders, total 15556608 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: 0xa3b9f812 Device Boot Start End Blocks Id System # flashbench -a /dev/disk/by-id/usb-Generic-_SD_MMC_20070818000000000-0\:2 --blocksize=1024 align 2147483648 pre 1.49ms on 2.26ms post 1.8ms diff 616µs align 1073741824 pre 1.56ms on 2.24ms post 1.71ms diff 607µs align 536870912 pre 1.54ms on 2.19ms post 1.76ms diff 543µs align 268435456 pre 1.37ms on 1.97ms post 1.48ms diff 542µs align 134217728 pre 1.35ms on 1.94ms post 1.55ms diff 493µs align 67108864 pre 1.42ms on 2.1ms post 1.6ms diff 591µs align 33554432 pre 1.34ms on 1.94ms post 1.56ms diff 485µs align 16777216 pre 1.44ms on 2.15ms post 1.64ms diff 608µs align 8388608 pre 1.34ms on 1.9ms post 1.59ms diff 437µs align 4194304 pre 1.42ms on 2.08ms post 1.64ms diff 555µs align 2097152 pre 1.39ms on 2.08ms post 1.59ms diff 599µs align 1048576 pre 1.35ms on 1.73ms post 1.6ms diff 250µs align 524288 pre 1.44ms on 1.82ms post 1.66ms diff 273µs align 262144 pre 1.43ms on 1.79ms post 1.71ms diff 226µs align 131072 pre 1.47ms on 1.83ms post 1.65ms diff 271µs align 65536 pre 1.42ms on 1.77ms post 1.67ms diff 227µs align 32768 pre 1.39ms on 1.73ms post 1.53ms diff 270µs align 16384 pre 1.4ms on 1.82ms post 1.63ms diff 308µs align 8192 pre 1.47ms on 1.78ms post 1.65ms diff 218µs align 4096 pre 1.59ms on 1.58ms post 1.57ms diff 2.05µs align 2048 pre 1.65ms on 1.65ms post 1.61ms diff 18.8µs My guess is that the erase size is 2 MiB and the pagesize is probably 8 KiB. # flashbench -O --erasesize=$[2 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic-_SD_MMC_20070818000000000-0\:2 --open-au-nr=2 --count=100 2MiB 2.59M/s 1MiB 2.83M/s 512KiB 3.36M/s 256KiB 3.05M/s 128KiB 1.89M/s 64KiB 3M/s 32KiB 2.71M/s 16KiB 2.24M/s 8KiB 1.79M/s 4KiB 875K/s # flashbench -O --erasesize=$[2 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic-_SD_MMC_20070818000000000-0\:2 --open-au-nr=2 --count=100 --random 2MiB 7.82M/s 1MiB 1.76M/s 512KiB 1.67M/s 256KiB 578K/s 128KiB 354K/s 64KiB 171K/s 32KiB 150K/s 16KiB 3.73M/s 8KiB 1.78M/s 4KiB 871K/s # flashbench -O --erasesize=$[2 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic-_SD_MMC_20070818000000000-0\:2 --open-au-nr=3 --count=100 2MiB 5.75M/s 1MiB 2.19M/s 512KiB 1.45M/s 256KiB 405K/s 128KiB 202K/s 64KiB 1.03M/s 32KiB 1.06M/s 16KiB 1.54M/s 8KiB 1.8M/s 4KiB 727K/s # flashbench -O --erasesize=$[2 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic-_SD_MMC_20070818000000000-0\:2 --open-au-nr=3 --count=100 --random 2MiB 5.82M/s 1MiB 1.88M/s 512KiB 1.12M/s 256KiB 501K/s 128KiB 252K/s 64KiB 163K/s 32KiB 151K/s 16KiB 2.09M/s 8KiB 1.79M/s 4KiB 667K/s Only 2 open AU-s. :,( # flashbench -f --erasesize=$[2 * 1024 * 1024] /dev/disk/by-id/usb-Generic-_SD_MMC_20070818000000000-0\:2 --count 100 2MiB 2.84M/s 4.78M/s 8.48M/s 8.45M/s 7.8M/s 7.86M/s 1MiB 8.9M/s 9.07M/s 9.03M/s 9.19M/s 9.17M/s 9.08M/s 512KiB 8.67M/s 8.74M/s 8.49M/s 8.83M/s 8.71M/s 8.52M/s 256KiB 7.19M/s 7.04M/s 6.85M/s 7.19M/s 7.05M/s 6.85M/s 128KiB 5.62M/s 5.84M/s 5.63M/s 5.81M/s 5.87M/s 5.69M/s 64KiB 12.7M/s 13.2M/s 13.3M/s 12.8M/s 13.2M/s 13.3M/s 32KiB 6.09M/s 6.2M/s 6.1M/s 6.27M/s 6.22M/s 6.17M/s 16KiB 3.79M/s 3.73M/s 3.76M/s 3.81M/s 972K/s 3.76M/s # flashbench -f --erasesize=$[2 * 1024 * 1024] /dev/disk/by-id/usb-Generic-_SD_MMC_20070818000000000-0\:2 --count 100 --random 2MiB 9.43M/s 8.57M/s 8.42M/s 8.42M/s 7.8M/s 7.87M/s 1MiB 2.71M/s 3.22M/s 3.2M/s 2.53M/s 3.07M/s 3.23M/s 512KiB 1.06M/s 1.42M/s 1.42M/s 1.28M/s 1.49M/s 1.21M/s 256KiB 465K/s 577K/s 635K/s 756K/s 722K/s 722K/s 128KiB 284K/s 354K/s 343K/s 532K/s 578K/s 577K/s 64KiB 163K/s 172K/s 172K/s 454K/s 431K/s 430K/s 32KiB 151K/s 151K/s 151K/s 211K/s 207K/s 207K/s 16KiB 1.69M/s 3.58M/s 3.72M/s 3.76M/s 3.4M/s 1.41M/s ?

13 years, 7 months

Samsung 32GB CLASS 10 SDHC "MB-MSBGA"

by Csordás Csaba Ifj.

# fdisk -l /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 Disk /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0:0: 31.4 GB, 31393316864 bytes 64 heads, 32 sectors/track, 29939 cylinders, total 61315072 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: 0x000f06a6 Device Boot Start End Blocks Id System /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0:0-part1 8192 122879 57344 c W95 FAT32 (LBA) /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0:0-part2 122880 21094399 10485760 83 Linux /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0:0-part3 21094400 61315071 20110336 83 Linux # flashbench -a /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --blocksize=1024 align 8589934592 pre 406µs on 820µs post 528µs diff 352µs align 4294967296 pre 418µs on 759µs post 492µs diff 304µs align 2147483648 pre 454µs on 855µs post 532µs diff 361µs align 1073741824 pre 446µs on 942µs post 518µs diff 460µs align 536870912 pre 426µs on 921µs post 550µs diff 433µs align 268435456 pre 464µs on 886µs post 500µs diff 404µs align 134217728 pre 466µs on 1.08ms post 541µs diff 576µs align 67108864 pre 487µs on 931µs post 548µs diff 413µs align 33554432 pre 464µs on 961µs post 535µs diff 461µs align 16777216 pre 464µs on 944µs post 529µs diff 448µs align 8388608 pre 458µs on 971µs post 561µs diff 461µs align 4194304 pre 478µs on 954µs post 543µs diff 444µs align 2097152 pre 529µs on 1.3ms post 517µs diff 774µs align 1048576 pre 428µs on 1.1ms post 533µs diff 614µs align 524288 pre 456µs on 892µs post 498µs diff 415µs align 262144 pre 428µs on 891µs post 498µs diff 428µs align 131072 pre 479µs on 967µs post 515µs diff 470µs align 65536 pre 438µs on 945µs post 535µs diff 459µs align 32768 pre 472µs on 954µs post 510µs diff 463µs align 16384 pre 461µs on 684µs post 528µs diff 189µs align 8192 pre 524µs on 526µs post 530µs diff -906ns align 4096 pre 531µs on 531µs post 544µs diff -6887ns align 2048 pre 547µs on 534µs post 561µs diff -20248n Erase size is 32 MiB, page size unknown. # flashbench -O --erasesize=$[32 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --open-au-nr=2 --count=100 32MiB 8.5M/s 16MiB 11.9M/s 8MiB 9.8M/s 4MiB 11.8M/s 2MiB 12M/s 1MiB 11.9M/s 512KiB 11.6M/s 256KiB 11.2M/s 128KiB 10.3M/s 64KiB 9.78M/s 32KiB 7.6M/s 16KiB 4.91M/s 8KiB 3.08M/s 4KiB 1.46M/s # flashbench -O --erasesize=$[32 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --open-au-nr=2 --count=100 --random 32MiB 11.5M/s 16MiB 12M/s 8MiB 11.9M/s 4MiB 11.8M/s 2MiB 11.8M/s 1MiB 11.8M/s 512KiB 11.5M/s 256KiB 10.9M/s 128KiB 9.95M/s 64KiB 9M/s 32KiB 6.8M/s 16KiB 4.88M/s 8KiB 2.28M/s 4KiB 1.22M/s # flashbench -O --erasesize=$[32 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --open-au-nr=3 --count=100 32MiB 11.2M/s 16MiB 12M/s 8MiB 12M/s 4MiB 12M/s 2MiB 11.9M/s 1MiB 11.8M/s 512KiB 11.6M/s 256KiB 11M/s 128KiB 10.1M/s 64KiB 9.2M/s 32KiB 6.98M/s 16KiB 4.92M/s 8KiB 3.07M/s 4KiB 1.47M/s # flashbench -O --erasesize=$[32 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --open-au-nr=3 --count=100 --random 32MiB 11.8M/s 16MiB 12M/s 8MiB 12M/s 4MiB 12M/s 2MiB 11.8M/s 1MiB 11.8M/s 512KiB 11.5M/s 256KiB 11M/s 128KiB 10M/s 64KiB 9.16M/s 32KiB 6.9M/s 16KiB 4.92M/s 8KiB 2.3M/s 4KiB 1.22M/s # flashbench -O --erasesize=$[32 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --open-au-nr=10 --count=100 32MiB 11.8M/s 16MiB 12M/s 8MiB 12M/s 4MiB 11.9M/s 2MiB 11.9M/s 1MiB 11.8M/s 512KiB 11.6M/s 256KiB 11.1M/s 128KiB 10.3M/s 64KiB 9.6M/s 32KiB 7.43M/s 16KiB 4.93M/s 8KiB 3.1M/s ^C # flashbench -O --erasesize=$[32 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --open-au-nr=10 --count=100 --random 32MiB 11.6M/s 16MiB 12M/s 8MiB 11.9M/s 4MiB 11.9M/s 2MiB 11.7M/s 1MiB 11.6M/s 512KiB 11.1M/s 256KiB 10.4M/s 128KiB 9.1M/s 64KiB 7.67M/s 32KiB 5.45M/s ^C # flashbench -O --erasesize=$[32 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --open-au-nr=11 --count=100 32MiB 11.8M/s 16MiB 12M/s 8MiB 12M/s 4MiB 12M/s 2MiB 11.9M/s 1MiB 11.9M/s 512KiB 11.7M/s 256KiB 11.2M/s 128KiB 10.5M/s 64KiB 10M/s 32KiB 7.77M/s 16KiB 4.9M/s 8KiB 3.09M/s ^C # flashbench -O --erasesize=$[32 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --open-au-nr=11 --count=100 --random 32MiB 12M/s 16MiB 12M/s 8MiB 12M/s 4MiB 11.9M/s 2MiB 11.8M/s 1MiB 11.7M/s 512KiB 11.3M/s 256KiB 10.6M/s 128KiB 9.46M/s 64KiB 8.26M/s 32KiB 5.9M/s 16KiB 3.4M/s ^C # flashbench -O --erasesize=$[32 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --open-au-nr=12 --count=100 32MiB 11.7M/s 16MiB 11.9M/s 8MiB 11.9M/s 4MiB 11.9M/s 2MiB 11.8M/s 1MiB 11.7M/s 512KiB 11.4M/s 256KiB 10.8M/s 128KiB 9.86M/s 64KiB 8.9M/s 32KiB 6.72M/s 16KiB 4.92M/s ^C # flashbench -O --erasesize=$[32 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --open-au-nr=12 --count=100 --random 32MiB 12M/s 16MiB 12M/s 8MiB 11.9M/s 4MiB 11.9M/s 2MiB 11.7M/s 1MiB 11.5M/s 512KiB 11M/s 256KiB 10.3M/s 128KiB 8.87M/s 64KiB 7.35M/s 32KiB 5.13M/s 16KiB 3.35M/s ^C root@marvin:~# for i in 30 31 32; do echo -e "\n\noau=$i"; flashbench -O --erasesize=$[32 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --open-au-nr=$i --count=100; done; for i in 30 31 32; do echo -e "\n\noau=$i random"; flashbench -O --erasesize=$[32 * 1024 * 1024] --blocksize=$[4*1024] /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --open-au-nr=$i --count=100 --random; done oau=30 32MiB 11.1M/s 16MiB 12M/s 8MiB 11.9M/s 4MiB 11.8M/s 2MiB 11.7M/s 1MiB 11.5M/s 512KiB 10.9M/s 256KiB 10.1M/s 128KiB 9.06M/s 64KiB 8.15M/s 32KiB 6.26M/s 16KiB 4.7M/s 8KiB 2.96M/s 4KiB 1.42M/s oau=31 32MiB 11.5M/s 16MiB 11.9M/s 8MiB 11.9M/s 4MiB 11.8M/s 2MiB 11.7M/s 1MiB 11.5M/s 512KiB 10.9M/s 256KiB 9.96M/s 128KiB 8.49M/s 64KiB 6.78M/s 32KiB 4.63M/s 16KiB 3.01M/s 8KiB 1.26M/s 4KiB 661K/s oau=32 32MiB 11.1M/s 16MiB 11.8M/s 8MiB 11.9M/s 4MiB 11.8M/s 2MiB 11.7M/s 1MiB 11.5M/s 512KiB 11M/s 256KiB 10.1M/s 128KiB 8.75M/s 64KiB 7.21M/s 32KiB 4.96M/s 16KiB 3M/s 8KiB 1.26M/s 4KiB 665K/s oau=30 random 32MiB 11.6M/s 16MiB 11.9M/s 8MiB 11.9M/s 4MiB 11.8M/s 2MiB 11.7M/s 1MiB 11.5M/s 512KiB 10.9M/s 256KiB 9.95M/s 128KiB 8.58M/s 64KiB 6.97M/s 32KiB 4.84M/s 16KiB 3.25M/s 8KiB 1.35M/s 4KiB 720K/s oau=31 random 32MiB 11.3M/s 16MiB 12M/s 8MiB 12M/s 4MiB 11.9M/s 2MiB 11.7M/s 1MiB 11.6M/s 512KiB 11M/s 256KiB 10.1M/s 128KiB 8.75M/s 64KiB 7.17M/s 32KiB 4.94M/s 16KiB 3.03M/s 8KiB 1.26M/s 4KiB 662K/s oau=32 random 32MiB 11.7M/s 16MiB 12M/s 8MiB 11.9M/s 4MiB 11.9M/s 2MiB 11.7M/s 1MiB 11.5M/s 512KiB 10.9M/s 256KiB 10M/s 128KiB 8.54M/s 64KiB 6.9M/s 32KiB 4.7M/s 16KiB 3.02M/s 8KiB 1.26M/s 4KiB 664K/s 30 open AU. Wow. # flashbench -f /dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0\:0 --count=100 4MiB 11.7M/s 11.9M/s 12M/s 11.5M/s 11.7M/s 11.5M/s 2MiB 12.1M/s 12M/s 12.1M/s 11.5M/s 11.7M/s 11.5M/s 1MiB 12M/s 12.1M/s 12M/s 11.6M/s 11.9M/s 11.9M/s 512KiB 11.7M/s 11.8M/s 11.9M/s 11M/s 11.4M/s 11.5M/s 256KiB 11.3M/s 11.3M/s 11.2M/s 10.4M/s 10.9M/s 11.3M/s 128KiB 10.4M/s 10.5M/s 10.8M/s 9.39M/s 10.1M/s 11M/s 64KiB 11.8M/s 11.8M/s 12.1M/s 11.6M/s 12.1M/s 11.9M/s 32KiB 8.05M/s 8.07M/s 8.2M/s 6.27M/s 7.18M/s 7.99M/s 16KiB 4.83M/s 5.04M/s 4.86M/s 4.76M/s 4.8M/s 4.91M/s How to interpret this result? Please help me, including my previous posts. Thank you.

13 years, 7 months

Samsung 32GB Class 10 SD-Card

by Benjamin Beichler

Hi, I have following cheaply bought SD-Card from Ebay: Samsung 32 GB MB-SSBGA MBSSBGVEOBGA-SH D 13CG5000 1 3 6 $:/sys/block/mmcblk0/device# head /sys/block/mmcblk0/device/{c*,scr,*rev,*id,serial,*size} ==> /sys/block/mmcblk0/device/cid <== 1b534d3030303030107677b02300c100 ==> /sys/block/mmcblk0/device/csd <== 400e00325b590000e9e57f800a404000 ==> /sys/block/mmcblk0/device/scr <== 02b5800200000000 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/cid <== 1b534d3030303030107677b02300c100 ==> /sys/block/mmcblk0/device/manfid <== 0x00001b ==> /sys/block/mmcblk0/device/oemid <== 0x534d ==> /sys/block/mmcblk0/device/serial <== 0x7677b023 ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 and here is the first Benchmark which is for me hard to interprete: root@ThinkPad-T400:~/flashbench/flashbench# ./flashbench -a /dev/mmcblk0 --blocksize 1024 --count=100 align 8589934592 pre 208µs on 221µs post 206µs diff 14.3µs align 4294967296 pre 207µs on 223µs post 208µs diff 15.1µs align 2147483648 pre 205µs on 219µs post 207µs diff 13µs align 1073741824 pre 257µs on 305µs post 241µs diff 56.7µs align 536870912 pre 225µs on 261µs post 225µs diff 36µs align 268435456 pre 294µs on 387µs post 281µs diff 100µs align 134217728 pre 239µs on 285µs post 234µs diff 48.1µs align 67108864 pre 222µs on 267µs post 220µs diff 46.6µs align 33554432 pre 211µs on 257µs post 218µs diff 41.8µs align 16777216 pre 231µs on 296µs post 237µs diff 61.8µs align 8388608 pre 224µs on 260µs post 225µs diff 36.2µs align 4194304 pre 222µs on 259µs post 227µs diff 34.4µs align 2097152 pre 230µs on 260µs post 213µs diff 38.6µs align 1048576 pre 218µs on 254µs post 223µs diff 33.8µs align 524288 pre 234µs on 266µs post 216µs diff 40.7µs align 262144 pre 224µs on 258µs post 224µs diff 33.3µs align 131072 pre 228µs on 257µs post 210µs diff 37.8µs align 65536 pre 212µs on 248µs post 216µs diff 33.8µs align 32768 pre 223µs on 253µs post 205µs diff 38.3µs align 16384 pre 239µs on 258µs post 234µs diff 21.3µs align 8192 pre 233µs on 233µs post 233µs diff 424ns align 4096 pre 234µs on 240µs post 234µs diff 5.88µs align 2048 pre 233µs on 234µs post 234µs diff 584ns in other outputs there are more or less only two steps (at eraseblock size and blocksize) and they are differently ordered. The Debug FS says erase block should be 4 MB but from this Benchmark I would suggest something like 2GB?!? Or is it 128MB ? Blocksize is 16KB i would suggest but I could be wrong ... could you help me ? I will give the other results if the block sizes are more clear to me...

13 years, 7 months

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