We have a BM 3.8 server running on an old Proliant 1600, maxed out
with 1GB of RAM and three cache volumes -one each on three 4.3GB 10k
RPM drives being driven by a Smart Array 2DH or SL RAID controller.

Cache volumes are as Craig recommends: Trad, 16KB, no comp or

Would a RAID 0 array across all three drives (still with the three
volumes) give better performance?

Cheers, Andy.