On Thu, 3 Apr 2003, Ross Vandegrift wrote:

quoted

I've benchmarked RAW disk speeds with an Ultra-100 and
WD1200JB drives, and gotten 50MB/S from each disk, as opposed to your
26MB/S (there should be almost no difference for the BB drives).

Makes perfect sense - he's getting 50M/s to each channel, but it's split
over two drives, so drive throughput is about halved.

the fasttrak-tx4 is an 4 channel controller (it is an dual ultra-100 on 1
pci board)
Jonathans WD1200BB's should be a bit faster than 30MB/sec maybe, but the
main problem is his /dev/md0...

Absolutely correct - you should *never* run IDE RAID on a channel that
has both a master and slave.  When one disk on an IDE channel has an

Jonathan is only using master devices, no slaves...