On Fri, 2003-09-12 at 07:34, Jeff wrote: > What I'm wondering about is what folks experience with software raid vs > hardware raid on linux is. A friend of mine ran a set of benchmarks at > work and found sw raid was running obscenely faster than the mylex and > (some other brand that isn't 3ware) raids..
I ended up going with a hybrid: RAID-1 across sets of two disks in hardware on Adaptec ZCR cards, and RAID-0 across the RAID-1s with Linux software RAID. Although the ZCR (2010 I believe) supports 0+1, using software striping turned in better performance for me. This way, I get brain dead simple dead disk replacement handled by hardware with some speed from software RAID. Also, I would think mirroring on the SCSI controller should take traffic off the PCI bus... <shrug> I have another machine that's stuck using a Compaq 5i plus controller with no battery backed write cache, in RAID 5. It sucks. Really bad. I'd rather use an IDE drive. :) ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org