Flashbench-results

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Samsung MB-SPAGC 16 GB Plus Class 10 SDHC

by Andrew Bradford

Possibly 0.5 MiB erase block based on factored size. Doing open-au tests nets no useful data, it's always fast, so just a few examples at the bottom. andrew@lati:~/git/flashbench$ sudo fdisk -l /dev/mmcblk0 | grep Disk Disk /dev/mmcblk0: 15.7 GB, 15719727104 bytes Disk identifier: 0x00000000 andrew@lati:~/git/flashbench$ factor 15719727104 15719727104: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 29983 andrew@lati:~/git/flashbench$ head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 1b534d3030303030107b156f8000d900 ==> /sys/block/mmcblk0/device/csd <== 400e00325b590000751e7f800a404000 ==> /sys/block/mmcblk0/device/date <== 09/2013 ==> /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 <== 02b5800200000000 ==> /sys/block/mmcblk0/device/serial <== 0x7b156f80 ==> /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@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 -a --blocksize=1024 align 4294967296 pre 292µs on 260µs post 245µs diff -8046ns align 2147483648 pre 308µs on 257µs post 231µs diff -12097n align 1073741824 pre 287µs on 251µs post 239µs diff -11574n align 536870912 pre 302µs on 253µs post 226µs diff -11129n align 268435456 pre 299µs on 263µs post 246µs diff -9463ns align 134217728 pre 309µs on 261µs post 234µs diff -10506n align 67108864 pre 293µs on 263µs post 244µs diff -5672ns align 33554432 pre 307µs on 257µs post 228µs diff -9952ns align 16777216 pre 289µs on 253µs post 241µs diff -12326n align 8388608 pre 227µs on 267µs post 231µs diff 38.4µs align 4194304 pre 232µs on 275µs post 230µs diff 43.3µs align 2097152 pre 229µs on 269µs post 225µs diff 42µs align 1048576 pre 223µs on 258µs post 222µs diff 35.8µs align 524288 pre 228µs on 266µs post 227µs diff 39.4µs align 262144 pre 226µs on 260µs post 223µs diff 35.2µs align 131072 pre 231µs on 266µs post 227µs diff 37µs align 65536 pre 220µs on 258µs post 220µs diff 38µs align 32768 pre 229µs on 266µs post 226µs diff 38.4µs align 16384 pre 232µs on 270µs post 235µs diff 36.2µs align 8192 pre 231µs on 231µs post 227µs diff 1.72µs align 4096 pre 221µs on 221µs post 220µs diff 319ns align 2048 pre 221µs on 224µs post 221µs diff 2.6µs andrew@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --blocksize=$[16*1024] --erasesize=$[8*1024*1024] --open-au-nr=1 8MiB 14.8M/s 4MiB 17.2M/s 2MiB 17.3M/s 1MiB 17.3M/s 512KiB 17.4M/s 256KiB 17.3M/s 128KiB 17.1M/s 64KiB 17M/s 32KiB 9.5M/s 16KiB 5.52M/s andrew@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --blocksize=$[16*1024] --erasesize=$[8*1024*1024] --open-au-nr=7 8MiB 11.1M/s 4MiB 10.8M/s 2MiB 11M/s 1MiB 12.3M/s 512KiB 12.3M/s 256KiB 15.8M/s 128KiB 17.1M/s 64KiB 16.9M/s 32KiB 7.48M/s 16KiB 6.54M/s andrew@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --blocksize=$[16*1024] --erasesize=$[8*1024*1024] --random --open-au-nr=1 8MiB 17.2M/s 4MiB 17.5M/s 2MiB 17.5M/s 1MiB 17M/s 512KiB 17.4M/s 256KiB 17.4M/s 128KiB 17.3M/s 64KiB 17.1M/s 32KiB 13.9M/s 16KiB 9.76M/s andrew@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --blocksize=$[16*1024] --erasesize=$[8*1024*1024] --random --open-au-nr=7 8MiB 17.4M/s 4MiB 17.4M/s 2MiB 17.4M/s 1MiB 17.3M/s 512KiB 17.3M/s 256KiB 17.2M/s 128KiB 17.1M/s 64KiB 16.9M/s 32KiB 13.7M/s 16KiB 9.62M/s

12 years, 1 month

Samsung MB-SP8GB 8 GB class 4 SDHC

by Andrew Bradford

1 MiB erase blocks, possibly. 7 open-au linear. 5 open-au random. dd speed at the end is puzzling given the flashbench speeds. andrew@lati:~/git/flashbench$ sudo fdisk -l /dev/mmcblk0 | grep Disk Disk /dev/mmcblk0: 7888 MB, 7888437248 bytes Disk identifier: 0x00000000 andrew@lati:~/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@lati:~/git/flashbench$ head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 1b534d3030303030100dd6253900da00 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900003ac57f800a400000 ==> /sys/block/mmcblk0/device/date <== 10/2013 ==> /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 <== 0235800300000000 ==> /sys/block/mmcblk0/device/serial <== 0x0dd62539 ==> /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@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 -a --blocksize=1024 --count=100 align 2147483648 pre 500µs on 726µs post 558µs diff 197µs align 1073741824 pre 513µs on 725µs post 546µs diff 196µs align 536870912 pre 507µs on 727µs post 554µs diff 196µs align 268435456 pre 510µs on 723µs post 549µs diff 194µs align 134217728 pre 502µs on 704µs post 545µs diff 180µs align 67108864 pre 509µs on 708µs post 548µs diff 180µs align 33554432 pre 498µs on 710µs post 550µs diff 186µs align 16777216 pre 499µs on 710µs post 551µs diff 185µs align 8388608 pre 502µs on 706µs post 567µs diff 172µs align 4194304 pre 499µs on 708µs post 539µs diff 188µs align 2097152 pre 500µs on 728µs post 568µs diff 194µs align 1048576 pre 513µs on 750µs post 601µs diff 193µs align 524288 pre 514µs on 743µs post 596µs diff 188µs align 262144 pre 519µs on 732µs post 574µs diff 186µs align 131072 pre 510µs on 764µs post 608µs diff 206µs align 65536 pre 510µs on 755µs post 602µs diff 199µs align 32768 pre 515µs on 742µs post 591µs diff 188µs align 16384 pre 507µs on 723µs post 570µs diff 185µs align 8192 pre 503µs on 717µs post 564µs diff 183µs align 4096 pre 576µs on 582µs post 569µs diff 9.44µs align 2048 pre 582µs on 584µs post 568µs diff 9.08µs andrew@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --blocksize=$[16*1024] --erasesize=$[1*1024*1024] --open-au-nr=1 1MiB 13.2M/s 512KiB 13.1M/s 256KiB 13M/s 128KiB 13M/s 64KiB 12.9M/s 32KiB 10.5M/s 16KiB 7.84M/s andrew@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --blocksize=$[16*1024] --erasesize=$[1*1024*1024] --open-au-nr=7 1MiB 6.69M/s 512KiB 13.1M/s 256KiB 12.6M/s 128KiB 12M/s 64KiB 11M/s 32KiB 8.13M/s 16KiB 5.43M/s andrew@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --blocksize=$[16*1024] --erasesize=$[1*1024*1024] --open-au-nr=8 1MiB 2.22M/s 512KiB 2.29M/s 256KiB 2.21M/s ^C andrew@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --blocksize=$[16*1024] --erasesize=$[1*1024*1024] --random --open-au-nr=5 1MiB 12.7M/s 512KiB 12.8M/s 256KiB 13.1M/s 128KiB 12.3M/s 64KiB 11.8M/s 32KiB 8.27M/s 16KiB 5.7M/s andrew@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --blocksize=$[16*1024] --erasesize=$[1*1024*1024] --random --open-au-nr=6 1MiB 4.14M/s 512KiB 4.17M/s 256KiB 6.28M/s 128KiB 4.11M/s 64KiB 2.98M/s 32KiB 2.74M/s 16KiB 1.97M/s andrew@lati:~/git/flashbench$ sudo dd if=/dev/zero of=/dev/mmcblk0 bs=1M count=100 oflag=direct 100+0 records in 100+0 records out 104857600 bytes (105 MB) copied, 20.3286 s, 5.2 MB/s

12 years, 1 month

SanDisk SSD - 64GB - SDSSDP-064G-G2

by Nilfred

http://kb.sandisk.com/app/answers/detail/a_id/6053#sandiskssd ls /dev/sd? /dev/sda /dev/sdb /dev/sdc /dev/sdd sudo fdisk -l /dev/sdd Disco /dev/sdd: 64.0 GB, 64023257088 bytes 255 cabezas, 63 sectores/pista, 7783 cilindros, 125045424 sectores en total Unidades = sectores de 1 * 512 = 512 bytes Tamaño de sector (lógico / físico): 512 bytes / 512 bytes Tamaño E/S (mínimo/óptimo): 512 bytes / 512 bytes Identificador del disco: 0x00000000 El disco /dev/sdd no contiene una tabla de particiones válida sudo hdparm -i /dev/sdd /dev/sdd: Model=SanDisk SDSSDP064G, FwRev=2.0.0, SerialNo=131000402997 Config={ Fixed } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=0 BuffType=unknown, BuffSize=unknown, MaxMultSect=1, MultSect=off CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=125045424 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6 AdvancedPM=yes: disabled (255) WriteCache=enabled Drive conforms to: unknown: ATA/ATAPI-4,5,6,7 * signifies the current active mode sudo hdparm -W0 /dev/sdd /dev/sdd: setting drive write-caching to 0 (off) write-caching = 0 (off) sudo flashbench -a /dev/sdd --count=100 align 17179869184 pre 197µs on 201µs post 198µs diff 3.88µs align 8589934592 pre 205µs on 208µs post 204µs diff 3.82µs align 4294967296 pre 192µs on 195µs post 191µs diff 3.77µs align 2147483648 pre 184µs on 186µs post 184µs diff 2.25µs align 1073741824 pre 205µs on 208µs post 204µs diff 3.82µs align 536870912 pre 202µs on 205µs post 202µs diff 2.88µs align 268435456 pre 205µs on 208µs post 203µs diff 3.65µs align 134217728 pre 195µs on 197µs post 192µs diff 3.62µs align 67108864 pre 205µs on 208µs post 204µs diff 3.78µs align 33554432 pre 204µs on 207µs post 203µs diff 3.56µs align 16777216 pre 204µs on 208µs post 204µs diff 4.11µs align 8388608 pre 205µs on 208µs post 204µs diff 3.87µs align 4194304 pre 205µs on 207µs post 203µs diff 3.34µs align 2097152 pre 204µs on 208µs post 204µs diff 4.17µs align 1048576 pre 205µs on 208µs post 203µs diff 3.83µs align 524288 pre 204µs on 208µs post 204µs diff 3.67µs align 262144 pre 193µs on 196µs post 192µs diff 3.63µs align 131072 pre 205µs on 208µs post 204µs diff 3.75µs align 65536 pre 193µs on 194µs post 192µs diff 1.31µs align 32768 pre 204µs on 204µs post 204µs diff 534ns sudo flashbench -a /dev/sdd --count=300 align 17179869184 pre 196µs on 198µs post 195µs diff 2.83µs align 8589934592 pre 200µs on 204µs post 200µs diff 3.87µs align 4294967296 pre 179µs on 184µs post 180µs diff 4.9µs align 2147483648 pre 180µs on 185µs post 179µs diff 5.26µs align 1073741824 pre 200µs on 204µs post 200µs diff 3.99µs align 536870912 pre 200µs on 204µs post 200µs diff 3.93µs align 268435456 pre 180µs on 183µs post 179µs diff 3.88µs align 134217728 pre 180µs on 184µs post 178µs diff 4.96µs align 67108864 pre 200µs on 204µs post 200µs diff 4.03µs align 33554432 pre 180µs on 184µs post 178µs diff 4.65µs align 16777216 pre 180µs on 184µs post 179µs diff 4.75µs align 8388608 pre 179µs on 183µs post 178µs diff 4.53µs align 4194304 pre 179µs on 183µs post 179µs diff 4.58µs align 2097152 pre 178µs on 183µs post 178µs diff 4.74µs align 1048576 pre 180µs on 183µs post 178µs diff 4.2µs align 524288 pre 200µs on 203µs post 199µs diff 3.83µs align 262144 pre 180µs on 183µs post 179µs diff 3.28µs align 131072 pre 200µs on 202µs post 199µs diff 3.16µs align 65536 pre 200µs on 200µs post 199µs diff 596ns align 32768 pre 179µs on 179µs post 178µs diff 576ns sudo flashbench --erasesize=8388608 /dev/sdd --blocksize=4096 -p 2MiB 228M/s 232M/s 232M/s 402M/s 230M/s 229M/s 233M/s 417M/s 1MiB 226M/s 226M/s 226M/s 411M/s 225M/s 226M/s 206M/s 342M/s 512KiB 217M/s 212M/s 218M/s 367M/s 203M/s 220M/s 215M/s 269M/s 256KiB 147M/s 144M/s 148M/s 316M/s 143M/s 139M/s 136M/s 186M/s 128KiB 82.4M/s 82.3M/s 82.1M/s 223M/s 81.9M/s 82.3M/s 83.3M/s 116M/s 64KiB 67.5M/s 67.7M/s 68.8M/s 118M/s 44.8M/s 41.3M/s 42.4M/s 104M/s 32KiB 41.3M/s 43.4M/s 44.3M/s 84.2M/s 17.2M/s 16.6M/s 16.3M/s 81.8M/s 16KiB 19.7M/s 16.8M/s 16.6M/s 59.9M/s 24.7M/s 24M/s 23.4M/s 54.7M/s 8KiB 9.85M/s 9.74M/s 10.1M/s 35.6M/s 11.5M/s 11.2M/s 11.1M/s 33.3M/s 4KiB 5.58M/s 5.47M/s 5.5M/s 19.7M/s 5.59M/s 5.54M/s 5.47M/s 18.5M/s 2KiB 2.85M/s 2.82M/s 2.83M/s 12.9M/s 2.77M/s 2.77M/s 2.77M/s 10.2M/s 1KiB 1.45M/s 1.43M/s 1.43M/s 5.96M/s 1.39M/s 1.39M/s 1.37M/s 4.99M/s 512B 728K/s 722K/s 722K/s 3.42M/s 682K/s 682K/s 683K/s 2.53M/s sudo flashbench --open-au --erasesize=8388608 /dev/sdd --blocksize=512 --open-au-nr=1 8MiB 154M/s 4MiB 148M/s 2MiB 133M/s 1MiB 139M/s 512KiB 125M/s 256KiB 87.4M/s 128KiB 54M/s 64KiB 48M/s 32KiB 36.2M/s 16KiB 7.78M/s 8KiB 5.58M/s 4KiB 3.64M/s 2KiB 2.12M/s 1KiB 1.12M/s 512B 578K/s sudo flashbench --open-au --erasesize=8388608 /dev/sdd --blocksize=512 --open-au-nr=1 --offset=$[63 * 512] 8MiB 172M/s 4MiB 158M/s 2MiB 147M/s 1MiB 153M/s 512KiB 106M/s 256KiB 96.2M/s 128KiB 60.8M/s 64KiB 27.2M/s 32KiB 10.1M/s 16KiB 8.24M/s 8KiB 5.6M/s 4KiB 3.59M/s 2KiB 2.12M/s 1KiB 1.11M/s 512B 584K/s sudo flashbench --open-au --erasesize=8388608 /dev/sdd --blocksize=512 --open-au-nr=1 --offset=4096 8MiB 115M/s 4MiB 150M/s 2MiB 138M/s 1MiB 145M/s 512KiB 144M/s 256KiB 86.8M/s 128KiB 46.7M/s 64KiB 35.8M/s 32KiB 21.8M/s 16KiB 7.57M/s 8KiB 5.49M/s 4KiB 3.61M/s 2KiB 2.12M/s 1KiB 1.11M/s 512B 583K/s sudo flashbench --open-au --erasesize=$((1024 * 1024)) /dev/sdd --blocksize=2048 --open-au-nr=64 1MiB 216M/s 512KiB 196M/s 256KiB 131M/s 128KiB 78.3M/s 64KiB 25.6M/s 32KiB 10.6M/s 16KiB 20.9M/s 8KiB 10.2M/s 4KiB 4.94M/s 2KiB 2.42M/s sudo flashbench --open-au --erasesize=$((1024 * 1024)) /dev/sdd --blocksize=2048 --random --open-au-nr=64 1MiB 166M/s 512KiB 180M/s 256KiB 125M/s 128KiB 77.2M/s 64KiB 26.5M/s 32KiB 11.1M/s 16KiB 19M/s 8KiB 10.5M/s 4KiB 4.99M/s 2KiB 2.42M/s sudo flashbench --open-au --erasesize=$((1024 * 1024)) /dev/sdd --blocksize=2048 --random --open-au-nr=64 --offset=4096 1MiB 158M/s 512KiB 93.1M/s 256KiB 74.9M/s 128KiB 50.1M/s 64KiB 18.3M/s 32KiB 7.72M/s 16KiB 13M/s 8KiB 9.52M/s 4KiB 4.81M/s 2KiB 2.18M/s sudo flashbench --open-au --erasesize=$((1024 * 1024)) /dev/sdd --blocksize=2048 --random --open-au-nr=64 --offset=2048 1MiB 106M/s 512KiB 150M/s 256KiB 108M/s 128KiB 59.3M/s 64KiB 18.2M/s 32KiB 7.84M/s 16KiB 12.8M/s 8KiB 9.55M/s 4KiB 4.81M/s 2KiB 2.24M/s sudo hdparm -W1 /dev/sdd /dev/sdd: setting drive write-caching to 1 (on) write-caching = 1 (on) # GPT sudo gdisk -l /dev/sdd GPT fdisk (gdisk) version 0.8.1 Partition table scan: MBR: not present BSD: not present APM: not present GPT: not present Creating new GPT entries. Disk /dev/sdd: 125045424 sectors, 59.6 GiB Logical sector size: 512 bytes Disk identifier (GUID): 6DFFE93A-FC70-48B8-AC79-70272114F979 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 125045390 Partitions will be aligned on 2048-sector boundaries Total free space is 125045357 sectors (59.6 GiB) Number Start (sector) End (sector) Size Code Name sudo gdisk /dev/sdd n 1 1M +382M ef00 n 2 +1M ef02 n 3 +4G 8200 n 4 +55G 8300 p Disk /dev/sdd: 125045424 sectors, 59.6 GiB Logical sector size: 512 bytes Disk identifier (GUID): 697667C5-CDC0-4B73-B04C-E11F2CA25816 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 125045390 Partitions will be aligned on 2048-sector boundaries Total free space is 529005 sectors (258.3 MiB) Number Start (sector) End (sector) Size Code Name 1 2048 784383 382.0 MiB EF00 EFI System 2 784384 786431 1024.0 KiB EF02 BIOS boot partition 3 786432 9175039 4.0 GiB 8200 Linux swap 4 9175040 124518399 55.0 GiB 8300 Linux filesystem w Y sudo mkfs -t vfat -F 32 -n EFI /dev/sdd1 sudo mkfs -t vfat -F 12 -n BIOS /dev/sdd2 sudo mkswap -L SWAP /dev/sdd3 Configurando la versión swapspace 1, tamaño = 4194300 KiB LABEL=SWAP, UUID=7c8f1757-941a-4325-b8be-0fc44a1c1e5c sudo mkfs.btrfs -L SanDisk /dev/sdd4 WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL WARNING! - see http://btrfs.wiki.kernel.org before using fs created label SanDisk on /dev/sdd4 nodesize 4096 leafsize 4096 sectorsize 4096 size 55.00GB Btrfs Btrfs v0.19

12 years, 1 month

Kingston DTi/8GB

by Isaac Jurado

Hello, I was testing my Kingston DataTraveler USB drive (0930:6544), for fun, but I'm unable to interpret the following results: $ sudo ./flashbench -a -c 64 -b 1024 /dev/sdb align 2147483648 pre 851µs on 845µs post 852µs diff -5969ns align 1073741824 pre 877µs on 872µs post 884µs diff -8436ns align 536870912 pre 847µs on 833µs post 851µs diff -15795n align 268435456 pre 851µs on 847µs post 842µs diff 787ns align 134217728 pre 837µs on 831µs post 844µs diff -9395ns align 67108864 pre 859µs on 823µs post 846µs diff -29289n align 33554432 pre 841µs on 835µs post 856µs diff -13367n align 16777216 pre 840µs on 831µs post 845µs diff -11363n align 8388608 pre 846µs on 850µs post 850µs diff 1.9µs align 4194304 pre 853µs on 839µs post 852µs diff -13892n align 2097152 pre 843µs on 823µs post 849µs diff -23535n align 1048576 pre 851µs on 852µs post 858µs diff -2358ns align 524288 pre 855µs on 846µs post 857µs diff -9568ns align 262144 pre 856µs on 842µs post 853µs diff -12572n align 131072 pre 857µs on 853µs post 860µs diff -5574ns align 65536 pre 855µs on 834µs post 842µs diff -14547n align 32768 pre 857µs on 850µs post 851µs diff -3882ns align 16384 pre 848µs on 846µs post 853µs diff -4037ns align 8192 pre 866µs on 866µs post 871µs diff -2467ns align 4096 pre 867µs on 859µs post 865µs diff -7232ns align 2048 pre 866µs on 866µs post 868µs diff -901ns The drive is quite old and it has been containing an ext2 filesystem since the beginning. I only use it to mirror a directory, so it's only plugged from time to time. But it has been almost full for a while. Maybe the microcontroller is doing something weird, I don't really know. Best regards. -- Isaac Jurado "The noblest pleasure is the joy of understanding." Leonardo da Vinci

12 years, 2 months

Sandisk 4GB Ultra 30MB/s compact flash card

by George Ingram

Looks like 4MB erase block, maybe a 128kB block and 32kb page. 7au, several runs done as there was some variation in numbers, these are typical runs. CompactFlash ATA device Model Number: SanDisk SDCFH-004G Serial Number: AAZ091113183311 Firmware Revision: HDX 7.07 pictsidhe@Miner-D:~/flashbench$ sudo ./flashbench -a /dev/sdb --blocksize=1024 align 1073741824 pre 763Âµs on 980Âµs post 766Âµs diff 215Âµs align 536870912 pre 884Âµs on 1.18ms post 888Âµs diff 290Âµs align 268435456 pre 843Âµs on 1.09ms post 840Âµs diff 248Âµs align 134217728 pre 837Âµs on 1.03ms post 782Âµs diff 223Âµs align 67108864 pre 870Âµs on 1.12ms post 835Âµs diff 269Âµs align 33554432 pre 810Âµs on 1ms post 752Âµs diff 222Âµs align 16777216 pre 864Âµs on 1.15ms post 862Âµs diff 287Âµs align 8388608 pre 802Âµs on 1.05ms post 807Âµs diff 247Âµs align 4194304 pre 773Âµs on 1.03ms post 808Âµs diff 240Âµs align 2097152 pre 786Âµs on 886Âµs post 785Âµs diff 100Âµs align 1048576 pre 782Âµs on 909Âµs post 778Âµs diff 129Âµs align 524288 pre 781Âµs on 885Âµs post 771Âµs diff 109Âµs align 262144 pre 779Âµs on 886Âµs post 778Âµs diff 107Âµs align 131072 pre 775Âµs on 882Âµs post 749Âµs diff 121Âµs align 65536 pre 779Âµs on 882Âµs post 779Âµs diff 103Âµs align 32768 pre 773Âµs on 895Âµs post 777Âµs diff 120Âµs align 16384 pre 779Âµs on 848Âµs post 778Âµs diff 69.5Âµs align 8192 pre 779Âµs on 843Âµs post 779Âµs diff 63.5Âµs align 4096 pre 775Âµs on 859Âµs post 780Âµs diff 81Âµs align 2048 pre 774Âµs on 843Âµs post 776Âµs diff 68.1Âµs pictsidhe@Miner-D:~/flashbench$ sudo ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdb --open-au-nr=7 4MiB 30.1M/s 2MiB 31.3M/s 1MiB 27.1M/s 512KiB 30M/s 256KiB 29.1M/s pictsidhe@Miner-D:~/flashbench$ sudo ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdb --open-au-nr=8 4MiB 31M/s 2MiB 12M/s 1MiB 3.48M/s 512KiB 1.51M/s 256KiB 703K/s dd tests, 256MB file size: Block: 2K 4K 8K 16K 32K 64K 128K 256K 512K 1M Write: 1.5 MB/s 2.7 MB/s 4.9 MB/s 12.2 MB/s 18.0 MB/s 22.4 MB/s 26.0 MB/s 26.3 MB/s 27.5 MB/s 26.5 MB/s Read: 3.7 MB/s 6.7 MB/s 11.0 MB/s 16.3 MB/s 21.5 MB/s 25.3 MB/s 27.8 MB/s 28.1 MB/s 28.2 MB/s 28.3 MB/s -- They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety. ~Benjamin Franklin

12 years, 3 months

Swissbit 512 MB microSD SLC SFSD0512N1BN1TO-I-ME-161-STD

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 <== 5d53424e31424e31062017a37000d900 ==> /sys/block/mmcblk0/device/csd <== 000e00325b5981e7b6dbff8312400000 ==> /sys/block/mmcblk0/device/date <== 09/2013 ==> /sys/block/mmcblk0/device/driver <== ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x6 ==> /sys/block/mmcblk0/device/hwrev <== 0x0 ==> /sys/block/mmcblk0/device/manfid <== 0x00005d ==> /sys/block/mmcblk0/device/name <== N1BN1 ==> /sys/block/mmcblk0/device/oemid <== 0x5342 ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 262144 ==> /sys/block/mmcblk0/device/scr <== 02b5000000000000 ==> /sys/block/mmcblk0/device/serial <== 0x2017a370 ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=N1BN1 MODALIAS=mmc:block andrew@brick:~/git/flashbench$ sudo fdisk -l /dev/mmcblk0 Disk /dev/mmcblk0: 511 MB, 511442944 bytes, 998912 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 235 998911 499338+ 6 FAT16 andrew@brick:~/git/flashbench$ sudo ./flashbench -a --blocksize=1024 --count=100 /dev/mmcblk0 align 134217728 pre 312µs on 466µs post 401µs diff 110µs align 67108864 pre 329µs on 471µs post 403µs diff 105µs align 33554432 pre 327µs on 479µs post 398µs diff 116µs align 16777216 pre 324µs on 477µs post 404µs diff 113µs align 8388608 pre 301µs on 442µs post 398µs diff 92.9µs align 4194304 pre 302µs on 445µs post 399µs diff 95.1µs align 2097152 pre 294µs on 441µs post 401µs diff 93.6µs align 1048576 pre 296µs on 436µs post 397µs diff 89.1µs align 524288 pre 293µs on 447µs post 404µs diff 98.5µs align 262144 pre 289µs on 442µs post 394µs diff 101µs align 131072 pre 278µs on 412µs post 394µs diff 75.7µs align 65536 pre 279µs on 417µs post 401µs diff 77.5µs align 32768 pre 280µs on 417µs post 397µs diff 78.5µs align 16384 pre 277µs on 413µs post 392µs diff 78.1µs align 8192 pre 283µs on 416µs post 392µs diff 78.7µs align 4096 pre 283µs on 412µs post 398µs diff 71.3µs align 2048 pre 363µs on 350µs post 310µs diff 13µs andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[256*1024] --blocksize=$[4*1024] --open-au-nr=1 256KiB 9.88M/s 128KiB 3.98M/s 64KiB 9.86M/s 32KiB 8.92M/s 16KiB 7.67M/s 8KiB 5.99M/s 4KiB 4.23M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[256*1024] --blocksize=$[4*1024] --open-au-nr=2 256KiB 4.78M/s 128KiB 5.31M/s 64KiB 8.23M/s 32KiB 8.95M/s 16KiB 7.64M/s 8KiB 6.12M/s 4KiB 4.29M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[256*1024] --blocksize=$[4*1024] --open-au-nr=3 256KiB 3.54M/s 128KiB 5.19M/s 64KiB 8.56M/s 32KiB 8.97M/s 16KiB 7.47M/s 8KiB 5.98M/s 4KiB 4.15M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[256*1024] --blocksize=$[4*1024] --open-au-nr=4 256KiB 4.5M/s 128KiB 5.61M/s 64KiB 8.91M/s 32KiB 8.86M/s 16KiB 7.55M/s 8KiB 6.06M/s 4KiB 4.29M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[256*1024] --blocksize=$[4*1024] --open-au-nr=5 256KiB 5.06M/s 128KiB 4.34M/s 64KiB 2.64M/s 32KiB 1.27M/s 16KiB 608K/s 8KiB 289K/s 4KiB 145K/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[256*1024] --blocksize=$[4*1024] --random --open-au-nr=1 256KiB 9.66M/s 128KiB 2.68M/s 64KiB 5.18M/s 32KiB 1.87M/s 16KiB 1.07M/s 8KiB 450K/s 4KiB 217K/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --find-fat --erasesize=$[256*1024] 256KiB 9.76M/s 9.73M/s 9.72M/s 9.72M/s 9.69M/s 9.92M/s 128KiB 3.97M/s 9.87M/s 9.81M/s 9.84M/s 9.71M/s 10M/s 64KiB 7.18M/s 9.59M/s 9.57M/s 9.77M/s 9.77M/s 9.46M/s 32KiB 8.81M/s 8.8M/s 8.77M/s 8.57M/s 8.77M/s 8.6M/s 16KiB 7.45M/s 7.54M/s 7.42M/s 7.47M/s 7.38M/s 7.58M/s -Andrew

12 years, 5 months