PERC 3/DC - Dual Channel performance

Sigbjorn Strommen sigbjorn.strommen at roxar.com
Tue Jun 11 05:31:00 CDT 2002


Paco Culebras Amigo wrote:

> I mean that if I configure It also in 3 arrays, each array with 2 disks
> in RAID 1, but one disk of every array in channel 0 and the other in
> channel 1, it will increase the I/O throughput ?

In theory, yes.  In my experience, no.  It seemed that traffic across
the channels was handled very inefficiently. A raid 0 volume with four
disks, and two disks on each channel gave less performance then 5 disks
in raid 5 on one channel...




-Sigbjorn




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