NV RAID0 Performance HORRIBLE, Help!

[LxMxFxD3]

Hey guys, I recently setup a RAID0 setup using 2x160GB WD PATA 160JBs I used PassMark to get these numbers:

Single drive:
Seq. read: 57.34MB/sec
Seq. write: 44.5MB/sec

Using the onboard NV RAID0 setup I get:

Seq read: 55.85MB/sec
Seq write: 25.44MB/sec !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Isn't raid0 supposed to *nearly* double the speed of both read and write?

Someone please help! I've set it up right as far as i can tell. Windows sees it as one volume. When I run NVRAIDMAN it sees it as a striped volume. All drivers are installed right. My only question is, I'm also running a SATA RAD5 from the onboard Si Image set, but that shouldn't affect it.

HELP! Whats going on? Or is NV raid0 just horrible??

 

[suicidalpigeon]

uh...no? raid 0 gives performance increase only noticible when looking at bechmarks. real world, you won't really tell the difference.

 

[Polish3d]

Try disabling command queining in SATA controllers

 

[LxMxFxD3]

they are PATA drives, so no SATA controller.

and Raid0 should give noticable improvement on synthetics. Huge actually.

Even my RAID5 setup I go from 50MB/sec to 90MB on the reads.

 

[LxMxFxD3]

anyone else opinions? TTT