seq. write tanked after ssd toolbox optimization

idata — Sat, 02 Jan 2010 10:19:52 GMT

good lord..what's going on?! after running ssd toolbox optimization, the drive's small-sized sequential write speeds tanked to ~4mb/sec, it was in ~30mb/sec before the optimization.. any ideas?

before:

---------------------------------------------------------------

Sequential Read : 256.878 MB/s

Sequential Write : 78.799 MB/s Random Read 512KB : 202.917 MB/s Random Write 512KB : 62.591 MB/s Random Read 4KB (QD=1) : 21.032 MB/s [ 5134.7 IOPS] Random Write 4KB (QD=1) : 31.544 MB/s [ 7701.2 IOPS] Random Read 4KB (QD=32) : 158.996 MB/s [ 38817.4 IOPS] Random Write 4KB (QD=32) : 59.246 MB/s [ 14464.2 IOPS]

Test : 500 MB [C: Used 31.5% (23.5/74.5 GB)]

after:

---------------------------------------------------------------

Sequential Read : 255.542 MB/s

Sequential Write : 57.406 MB/s Random Read 512KB : 196.012 MB/s Random Write 512KB : 56.329 MB/s Random Read 4KB (QD=1) : 20.368 MB/s [ 4972.6 IOPS] Random Write 4KB (QD=1) : 4.098 MB/s [ 1000.5 IOPS] Random Read 4KB (QD=32) : 157.508 MB/s [ 38454.2 IOPS] Random Write 4KB (QD=32) : 4.366 MB/s [ 1065.9 IOPS]

Test : 500 MB [C: Used 32.8% (24.4/74.5 GB)]

Re: seq. write tanked after ssd toolbox optimization

idata — Sat, 02 Jan 2010 21:02:16 GMT

so i switched the achi mode from raid mode in the bios and the results returned to pre-optimization level or even better:

---------------------------------------------------------------

Sequential Read : 258.652 MB/s

Sequential Write : 88.130 MB/s Random Read 512KB : 200.476 MB/s Random Write 512KB : 88.656 MB/s Random Read 4KB (QD=1) : 20.743 MB/s [ 5064.1 IOPS] Random Write 4KB (QD=1) : 51.535 MB/s [ 12581.9 IOPS] Random Read 4KB (QD=32) : 159.902 MB/s [ 39038.5 IOPS] Random Write 4KB (QD=32) : 64.472 MB/s [ 15740.1 IOPS]

Test : 500 MB [C: Used 32.4% (24.1/74.5 GB)]

what's a little odd and i don't quite understand yet is that prior to optimization i was under raid mode also (even though the system drive wasn't raid'ed).. it seems that the optimization done something that i don't fully understand to make it raid/achi sensitive..

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seq. write tanked after ssd toolbox optimization

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