Intel Communities: Message List

Re: no iastor.sys or iastorV.sys being used

webadmin@intel.com — Sun, 03 Jan 2010 20:38:43 GMT

ok, got it. thanks!

so intel raid supposed to be ahci inclusive also, but it seems that ide protocol is being used for drives that aren't in raid config. i am getting only ~4mb/second on random writes while with ahci mode i can get up to ~30mb/second on random writes. (using crystal diskmark)

thoughts?

slow random writes

webadmin@intel.com — Sun, 03 Jan 2010 17:24:01 GMT

system: ich9r southbridge, bios sata mode set to raid, intel g2 80gb ssd.

os: win7 32-bit.

disk setup: intel ssd as single os drive, 2 samsung 7200rpm hd in raid1 setup controled by raid bios

issue: random writes in this setup yield only ~4mb/second.. (have tried changed sata mode to ahci, random writes are in 50-70mb/second range, but losing raid1 support in this config..)

thoughts?

no iastor.sys or iastorV.sys being used

webadmin@intel.com — Sun, 03 Jan 2010 05:25:31 GMT

using windows 7 32-bit, any ideas why after installing intel matrix stroage or the latest rst drivers that iastor.sys isn't being used by windows 7? it is still using disk.sys according to driver detail under property.

board has a ich9r southbridge and raid mode is enabled by bios.

Re: random write tanked after ssd toolbox optimization

webadmin@intel.com — Sat, 02 Jan 2010 20:02:16 GMT

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

---------------------------------------------------------------
CrystalDiskMark 3.0 Beta2 (C) 2007-2009 hiyohiyo
Crystal Dew World : http://crystalmark.info/
---------------------------------------------------------------

           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..

seq. write tanked after ssd toolbox optimization

webadmin@intel.com — Sat, 02 Jan 2010 09:19:52 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)]