NVidia RAID0 Performance Problem

[rpstewart]

Right, time for me to ask the questions...

Just added a pair of new 7200.10s to the PC as a RAID0 array and the performance isn't what it should be:

• NForce drivers v6.86 (latest) are installed
• Mobo BIOS is at latest level
• All drivers installed in windows
• Drives have had SATA1 jumpers removed and are running SATA2 mode according to the drivers.
• Both drives give normal HDTach traces when run in single drive mode

Drive1
Drive2

For the life of me I can't see anything wrong or anything else I can change. Anyone got any ideas?

 

[rpstewart]

They should support it and it is turned on so I'll turn it off and give it another whirl.

EDIT: No joy I'm afraid, still getting the same results.

 

[rpstewart]

Nforce4 SLi x16 I think - Asus A8N32 SLi Deluxe mobo.

 

[rpstewart]

OK, I've tried disabling all the caching and the NCQ and things are looking a bit better:

The average read is OK, I was hoping for 125Mb/s or so but what I have is consistent across most of the array which is something.