I’ve mentioned my troubles with the HPT372A (Rocket RAID 1520) before, and since then I’ve done a little more exploring. I found that HighPoint does have BIOS upgrades available for the card, one of which claims to fix a problem very much like what I was having. However, after applying this update, I consistently got kernel panics, using the newest kernel for RHEL (well, really CentOS in my case, but they’re essentially identical): 2.6.9-11.EL. In short, I’ve given this up as a lost cause.