arnd@wuerfel:~/flashbench$ grep sdd /proc/partitions 8 48 7684096 sdd
arnd@wuerfel:~/flashbench$ factor 7684096 7684096: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 7 67
arnd@wuerfel:~/flashbench$ sudo dosfsck /dev/sdd dosfsck 3.0.9, 31 Jan 2010, FAT32, LFN /dev/sdd: 0 files, 1/1917275 clusters
arnd@wuerfel:~/flashbench$ sudo ./flashbench -a /dev/sdd --blocksize=1024 align 1073741824 pre 680µs on 995µs post 746µs diff 282µs align 536870912 pre 724µs on 992µs post 794µs diff 233µs align 268435456 pre 743µs on 993µs post 792µs diff 225µs align 134217728 pre 737µs on 996µs post 791µs diff 232µs align 67108864 pre 736µs on 991µs post 802µs diff 222µs align 33554432 pre 733µs on 993µs post 762µs diff 245µs align 16777216 pre 736µs on 991µs post 795µs diff 225µs align 8388608 pre 731µs on 994µs post 777µs diff 240µs align 4194304 pre 735µs on 780µs post 789µs diff 18µs align 2097152 pre 739µs on 763µs post 763µs diff 12.6µs align 1048576 pre 744µs on 747µs post 763µs diff -6809ns align 524288 pre 740µs on 762µs post 781µs diff 1.25µs align 262144 pre 737µs on 780µs post 762µs diff 30.6µs align 131072 pre 735µs on 776µs post 789µs diff 14.4µs align 65536 pre 740µs on 780µs post 808µs diff 6.1µs align 32768 pre 736µs on 804µs post 805µs diff 33.1µs align 16384 pre 740µs on 825µs post 823µs diff 43.5µs align 8192 pre 735µs on 950µs post 792µs diff 187µs align 4096 pre 793µs on 864µs post 742µs diff 96.2µs align 2048 pre 792µs on 761µs post 761µs diff -15180n arnd@wuerfel:~/flashbench$ sudo ./flashbench -a /dev/sdd --blocksize=3072 align 805306368 pre 667µs on 1.01ms post 773µs diff 294µs align 402653184 pre 773µs on 1.02ms post 774µs diff 249µs align 201326592 pre 773µs on 1.02ms post 772µs diff 249µs align 100663296 pre 774µs on 1.02ms post 773µs diff 247µs align 50331648 pre 775µs on 1.03ms post 776µs diff 251µs align 25165824 pre 776µs on 1.02ms post 772µs diff 250µs align 12582912 pre 771µs on 774µs post 773µs diff 2.36µs align 6291456 pre 773µs on 768µs post 775µs diff -5971ns align 3145728 pre 775µs on 772µs post 771µs diff -1302ns align 1572864 pre 769µs on 772µs post 772µs diff 1.65µs align 786432 pre 771µs on 777µs post 770µs diff 6.66µs align 393216 pre 772µs on 776µs post 775µs diff 2.65µs align 196608 pre 768µs on 774µs post 773µs diff 3.11µs align 98304 pre 767µs on 768µs post 773µs diff -1781ns align 49152 pre 774µs on 775µs post 764µs diff 6.2µs align 24576 pre 776µs on 916µs post 775µs diff 141µs align 12288 pre 774µs on 793µs post 767µs diff 22.6µs align 6144 pre 794µs on 773µs post 911µs diff -78786n arnd@wuerfel:~/flashbench$ ^C arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=8388608 /dev/sdd -- blocksize=512 --open-au-nr=1 8MiB 21.9M/s 4MiB 21.1M/s 2MiB 21.3M/s 1MiB 21.4M/s 512KiB 21.3M/s 256KiB 21.2M/s 128KiB 21.1M/s 64KiB 21.3M/s 32KiB 21.4M/s 16KiB 20.9M/s 8KiB 15.8M/s 4KiB 10.3M/s 2KiB 5.46M/s 1KiB 2.72M/s 512B 1.36M/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=8388608 /dev/sdd -- blocksize=512 --open-au-nr=1 --random 8MiB 21.9M/s 4MiB 21.3M/s 2MiB 12.2M/s 1MiB 7.39M/s 512KiB 5.99M/s 256KiB 5.26M/s 128KiB 4.99M/s 64KiB 4.75M/s 32KiB 4.44M/s 16KiB 3.42M/s 8KiB 1.5M/s 4KiB 1.04M/s 2KiB 438K/s 1KiB 225K/s 512B 115K/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=8388608 /dev/sdd -- blocksize=4096 --open-au-nr=4 8MiB 21.5M/s 4MiB 21.4M/s 2MiB 21.3M/s 1MiB 21.2M/s 512KiB 21M/s 256KiB 20.5M/s 128KiB 19.5M/s 64KiB 17.8M/s 32KiB 15.3M/s 16KiB 9.7M/s 8KiB 1.09M/s 4KiB 493K/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=8388608 /dev/sdd -- blocksize=16384 --open-au-nr=5 8MiB 21.6M/s 4MiB 16.5M/s 2MiB 14.7M/s 1MiB 13.9M/s 512KiB 13.1M/s 256KiB 12.2M/s 128KiB 11.5M/s 64KiB 10.8M/s 32KiB 9.74M/s 16KiB 6.62M/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=8388608 /dev/sdd -- blocksize=16384 --open-au-nr=6 8MiB 21.5M/s 4MiB 14.3M/s 2MiB 12.2M/s 1MiB 11.3M/s 512KiB 10.7M/s 256KiB 9.93M/s 128KiB 9.42M/s 64KiB 8.91M/s 32KiB 8M/s 16KiB 4.94M/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=8388608 /dev/sdd -- blocksize=16384 --open-au-nr=8 8MiB 21.5M/s 4MiB 12.3M/s 2MiB 10.1M/s 1MiB 9.16M/s 512KiB 8.57M/s 256KiB 6.23M/s 128KiB 7.62M/s 64KiB 7.24M/s 32KiB 5.34M/s 16KiB 2.79M/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=8388608 /dev/sdd -- blocksize=16384 --open-au-nr=16 8MiB 21.3M/s 4MiB 10.1M/s 2MiB 5.4M/s 1MiB 3.7M/s 512KiB 3.05M/s 256KiB 3.15M/s 128KiB 3.04M/s 64KiB 1.95M/s 32KiB 1.64M/s 16KiB 972K/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[8*1024*1024] /dev/sdd --offset=$[24 * 1024* 1024] --open-au-nr=20 [sudo] password for arnd: 8MiB 21.6M/s 4MiB 10.6M/s 2MiB 4.22M/s 1MiB 3.38M/s 512KiB 3.15M/s 256KiB 2.6M/s 128KiB 2.93M/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[8*1024*1024] /dev/sdd --offset[24 * 1024* 1024] --open-au-nr=32 8MiB 21.4M/s 4MiB 6.49M/s 2MiB 3.33M/s 1MiB 2.78M/s 512KiB 2.25M/s 256KiB 2.09M/s 128KiB 2.23M/s 64KiB 1.2M/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[512*1024] /dev/sdd --offset=$[24 * 1024* 1024] --open-au-nr=32 [sudo] password for arnd: 512KiB 469K/s 256KiB 318K/s 128KiB 124K/s 64KiB 69.2K/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[512*1024] /dev/sdd --offset=$[24 * 1024* 1024] --open-au-nr=17 512KiB 444K/s 256KiB 410K/s 128KiB 403K/s 64KiB 400K/s 32KiB 397K/s 16KiB 389K/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=8388608 /dev/sdd -- blocksize=16384 --open-au-nr=16 --random 8MiB 21.6M/s 4MiB 10.2M/s 2MiB 3.68M/s 1MiB 2.82M/s 512KiB 1.55M/s 256KiB 1.81M/s 128KiB 2.43M/s 64KiB 1.12M/s 32KiB 685K/s 16KiB 334K/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[8*1024*1024] /dev/sdd --offset=$[24 * 1024* 1024] --open-au-nr=17 [sudo] password for arnd: 8MiB 21.7M/s 4MiB 9.06M/s 2MiB 3.6M/s 1MiB 2.57M/s 512KiB 1.28M/s 256KiB 1.77M/s 128KiB 2.05M/s 64KiB 1.11M/s 32KiB 693K/s 16KiB 364K/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[8*1024*1024] /dev/sdd --offset=$[24 * 1024* 1024] --open-au-nr=18 [sudo] password for arnd: 8MiB 18.6M/s 4MiB 8.99M/s 2MiB 3.4M/s 1MiB 2.13M/s 512KiB 1.93M/s 256KiB 2.33M/s 128KiB 1.24M/s 64KiB 1.07M/s 32KiB 681K/s 16KiB 335K/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[512*1024] /dev/sdd --offset=$[24 * 1024* 1024] --open-au-nr=18 [sudo] password for arnd: 512KiB 442K/s 256KiB 407K/s 128KiB 127K/s 64KiB 82.5K/s 32KiB 43.3K/s 16KiB 22.6K/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[512*1024] /dev/sdd --offset=$[24 * 1024* 1024] --open-au-nr=17 [sudo] password for arnd: 512KiB 418K/s 256KiB 407K/s 128KiB 400K/s 64KiB 397K/s 32KiB 394K/s 16KiB 386K/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*1024] /dev/sdd --offset=$[24 * 1024* 1024] --open-au-nr=17 1MiB 915K/s 512KiB 877K/s 256KiB 853K/s 128KiB 837K/s 64KiB 828K/s 32KiB 816K/s 16KiB 313K/s arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*1024] /dev/sdd --offset=$[24 * 1024* 1024] --open-au-nr=18 1MiB 865K/s 512KiB 872K/s 256KiB 370K/s 128KiB 704K/s 64KiB 96.5K/s 32KiB 724K/s 16KiB 23K/s arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*1024] /dev/sdd --offset=$[25 * 1024* 1024] --open-au-nr=18 [sudo] password for arnd: 1MiB 21.2M/s 512KiB 622K/s 256KiB 386K/s 128KiB 182K/s 64KiB 88.5K/s
arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*1024] /dev/sdd --offset=$[25 * 1024* 1024] --open-au-nr=16 [sudo] password for arnd: 1MiB 21.3M/s 512KiB 20.2M/s 256KiB 18.9M/s 128KiB 18M/s 64KiB 16.4M/s 32KiB 480K/s 16KiB 351K/s arnd@wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*1024] /dev/sdd --offset=$[25 * 1024* 1024] --open-au-nr=17 1MiB 21.1M/s 512KiB 825K/s 256KiB 338K/s 128KiB 198K/s 64KiB 97.2K/s 32KiB 45.3K/s