The first is the 4GB SSD and the second is the 8GB SSD inside my EEE 901
netbook. These old SSDs seem to be from the dumper side of SSD market
and behave more like dump flash with little controller interference.
My guess for the 4GB SSD: erase size 1 Megabyte, page size 2048 Byte
My guess for the 8GB SSD: erase size 2 Megabyte, page size 2048 Byte
Both perform well with up to 9 au, though 8 give a little more speed.
Now I would only need to know how to translate this into fitting
stride/stripe values...
root@Microknoppix:/tmp/flashbench-HEAD-2e30b19# ./flashbench -a /dev/sda
--blocksize=1024
align 1073741824 pre 641µs on 792µs post 567µs
diff 187µs
align 536870912 pre 683µs on 851µs post 577µs diff 221µs
align 268435456 pre 657µs on 847µs post 564µs diff 236µs
align 134217728 pre 626µs on 794µs post 525µs diff 218µs
align 67108864 pre 666µs on 836µs post 582µs diff 212µs
align 33554432 pre 573µs on 732µs post 571µs diff 160µs
align 16777216 pre 577µs on 738µs post 572µs diff 163µs
align 8388608 pre 565µs on 740µs post 563µs diff 176µs
align 4194304 pre 580µs on 735µs post 562µs diff 164µs
align 2097152 pre 552µs on 706µs post 522µs diff 169µs
align 1048576 pre 565µs on 734µs post 547µs diff 178µs
align 524288 pre 548µs on 640µs post 542µs diff 94.7µs
align 262144 pre 546µs on 639µs post 540µs diff 96.1µs
align 131072 pre 547µs on 640µs post 541µs diff 96.1µs
align 65536 pre 536µs on 629µs post 528µs diff 96.7µs
align 32768 pre 535µs on 626µs post 526µs diff 95.6µs
align 16384 pre 534µs on 627µs post 527µs diff 97.2µs
align 8192 pre 558µs on 654µs post 554µs diff 98µs
align 4096 pre 536µs on 633µs post 528µs diff 101µs
align 2048 pre 549µs on 546µs post 550µs diff -3781ns
root@Microknoppix:/tmp/flashbench-HEAD-2e30b19# ./flashbench -a /dev/sdb
--blocksize=1024
align 2147483648 pre 740µs on 890µs post 628µs
diff 207µs
align 1073741824 pre 732µs on 898µs post 603µs
diff 231µs
align 536870912 pre 740µs on 913µs post 590µs diff 248µs
align 268435456 pre 716µs on 890µs post 596µs diff 234µs
align 134217728 pre 694µs on 858µs post 586µs diff 218µs
align 67108864 pre 598µs on 771µs post 575µs diff 184µs
align 33554432 pre 619µs on 788µs post 590µs diff 184µs
align 16777216 pre 624µs on 791µs post 591µs diff 184µs
align 8388608 pre 613µs on 776µs post 578µs diff 180µs
align 4194304 pre 619µs on 781µs post 584µs diff 179µs
align 2097152 pre 617µs on 782µs post 574µs diff 187µs
align 1048576 pre 631µs on 756µs post 632µs diff 125µs
align 524288 pre 634µs on 747µs post 634µs diff 113µs
align 262144 pre 619µs on 717µs post 599µs diff 108µs
align 131072 pre 603µs on 722µs post 601µs diff 120µs
align 65536 pre 627µs on 748µs post 629µs diff 120µs
align 32768 pre 619µs on 743µs post 628µs diff 119µs
align 16384 pre 619µs on 736µs post 621µs diff 116µs
align 8192 pre 622µs on 733µs post 617µs diff 114µs
align 4096 pre 598µs on 721µs post 587µs diff 128µs
align 2048 pre 596µs on 596µs post 598µs diff -1092ns
--
Christian Brandt
life is short and in most cases it ends with death
but my tombstone will carry the hiscore
