Recently my RAID 0 setup has been extremely slow, with read/write speeds averaging about 2MB/sec. It's been causing problems in a whole lot of applications. I've tried reinstalling RAID drivers, enabling/disabling read/write cache, enabling/disabling RAID in bios, and defragmenting the whole thing. What's going on? How can I run diagnostics?
I am testing read/write speeds with Bart Stuff Test v5. When I test with HDTach, I get an average of 87MB/sec. Why the huge difference?
There is only one idea I have as to what could have caused this; I tried to defragment the RAID disk a while ago, just because I had heard it was a good idea. I used O&O Defrag's "COMPLETE/Access" method of defragmentation, but after leaving it alone for 6 hours and getting 1% progress, I cancelled it.
After getting issues, I went back and let it complete the whole process using the "STEALTH" method, but the slow speeds persist.
For comparison, the IDE drive my system is running off of is averaging about 24MB/sec read/write.
Windows XP 64-bit
4xWestern Digital 250GB SATA in RAID 0 configuration
Tyan Thunder K8WE S2895 Motherboard, Dual Opteron 270
4 GB RAM