On Feb 7, 2012, at 3:53 PM, Ken Smith kens@kensnet.org wrote:
Hi, I've seen comments about the poor performance of these cards with raid 5 configs. I have an old card with 3 x 500G IDE drives connected in raid 5 and I'm getting around 10mb/s write performance. :-(
I'm seeing high iowait figures at times and associated very high cpu load average figures, probably because, under load, everything is stacked up waiting for the disks to actually do something.
A non-raid sata disk in the same machine manages 70mb/s
Does anyone know what the performance is like if I used the 3ware just as an IDE controller? I could then switch to software raid5?
I'm sure you can, but if that's what you want why not just get a better SATA card or a better RAID card?
-Ross