RAID....slow on C: but fast on D:

Sirius1212

Junior Member
Feb 21, 2001
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Here's a strange thing.

I set my RAID array up with a C: (15GB) partition and a D: (43GB) partition using 2 IBM 75GXP 30GB drives with my onboard Promise RAID controller (on an MSI K7T Turbo-R).

When I install Windows 2000 or XP and I benchmark the hard disks using SiSoft Sandra (2001te) I get a score of 24000 for the C: but 43000 for the D:

But if I install Windows 98 or ME, the C: AND the D: both score around 43000.

So why is the C: (which contains the winnt directory) so much slower than it should be? Infact it benchmarks at about the same speed as a single drive!!

I have tried the same on PC's at work (using Promise FastTrak100 controller and different make HD's) and I get the same results.

Any ideas?