Kyle wrote:
>
> Just a couple of ideas or things to try:
> Check your memory for errors (memtest86)

Done. 50 hours without errors.

> Consider trying another version of the Sata driver, but be careful of
> version conflicts causing HD corruption (backups might be advisable
> before trying this out)

My mobo uses the disks in compatibility mode, i.e. fakes them to be PATA
drives. SATA drivers are therefore not used.

> Sata BIOS update? Again, watch out for HD corruption problems, backup
> everything first.

BIOS is the most recent version.

> Is there a raid setup for the Sata interface, could this be affecting
> HD activity?

RAID has been disabled in the BIOS and is not active in the OS.

> Boot from a Knoppix Live CD, then try some large file writes/transfers
> to the partition in issue.

That might be an option.
I'll get back on that.