Ok so I've flashed in a new BIOS. The first boot after flash returned "Verifying DMI pool data... Update Success" but it still failed to boot. Every other attempt after that just failed on "Verifying DMI pool data...". I have two HDDs in with software RAID set up - /boot partition is RAID-1. I'm not sure how booting works, but I assume the BIOS looks for the first disk it recognises then looks at its boot block. Thinking maybe one HDD had a bad boot block, I swapped cables between the two HDDs so the alternate disk would be the preferred one. No change. I have also mucked around with the various settings regarding how the BIOS accesses the disks. eg. "LBA, Auto, Large". Setting to LBA returned "Geom error".
It still boots fine off CD drive.
I'm thinking I have a BIOS error, but I'm not completely sure. I don't really understand why anything would have suddenly changed after some time with the power off, unless the power down somehow glitched the BIOS, but wouldn't the BIOS flash have fixed that?
I think the next thing to try will be to try a single-disk install on each HDD and try to rule out issues with a particular drive.
edit: I should mention that once booted off CD, I can continue to access the disks via Linux Rescue, or if I reinstall linux, however further boot attempts from HDD always fail.
Last edited by Mudhoney; 29th July 2009 at 08:05 AM.
Reason: see inline