On Wednesday, November 30, 2011 06:40:44 PM Ross Walker wrote: > I have heard of people setting their PERCs in pass-through mode and doing software RAID, or setting the drives up as a bunch of single disk RAID0 drives and doing software RAID, so I wouldn't rule it out. FWIW, I've done this in testing, and for a two-socket dual-core Dell PE 2850 we have here, the Linux software RAID was substantially faster than the PERC (U320 SCSI) built-in RAID. Speed was checked with bonnie++ while the box was normally loaded. In both cases, CentOS 5 was the OS installed. YMMV.