[CentOS] Centos 5.6 3ware raid 5

[Ross Walker]

On Feb 7, 2012, at 3:53 PM, Ken Smith <kens at 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