Hi Nick, Actually, I originally had 5x1Tb in a LVM group and that suited me fine. The HBA didn't support RAID for some reason. The only problem was that Fedora 11 udev tended to timeout when attempting to detect the individual disks. The only way to solve the problem was to plug in the SAS cable after the Fedora had booted and the detection was successful. Here is a post on fedora forum and entry in bugzilla:
http://forums.fedoraforum.org/showthread.php?t=243493&highlight=J4200 https://bugzilla.redhat.com/show_bug.cgi?id=582094 We upgraded the HBA to one which supported RAID and I decided on Fedora 13 (since Fedora 11 is now EOL). In Fedora 13, udev doesn't appear to detect individual disks. I'm guessing that the default behaviour for the new Adaptec driver in this kernel is not to expose physical components of the arrays (expose_physicals=0). I can probably try to override the driver preference and see what the IO is like to individual disks. Perhaps the problem will go away once I've installed the necessary firmware. I'm very tempted to run a chroot Gentoo from within RedHat. I really need a recent version of linux for development purposes, but it needs to sit on a vendor supported OS. I brought up a chroot image as a way to distribute GEANT -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
