Various Topics on HDD

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I have an Asus P4G8X motherboard with Silicon Image 3112a Controller
and I installed a set of new SATA
hard drives a few weeks ago as a mirrored pair - everything worked
fine. (Only drives in the system.)

Yesterday when booting up I got an error, "incomplete raid set" then
before I could react the system booted into Windows XP Pro.

I restarted the system and hit ctrl S to get to the RAID Configuration
Utility, selected the option to rebuild the mirrored set. Selected the
option for offlinerebuild and entered Y to start. Nothing appeared to
happen but I let it go for a few hours but nothing happened.

Checked around and found that there should be some indication of
percentage that was complete via a progress meter but it never even
appeared.

I updated the RAID utility to what I think is the latest version,
dated 2003 and tried again - no difference nothing happened.

I updated the BIOS to the latest version I could find - Rev 1006 and
tried again - still nothing.

I tried the option for onlinerebuild - still nothing.

The utility shows Drive 0 Current and Drive 1 Rebuild

The computer will boot into Windows and appears to run normally with
the exception of the drive.

Any help would be greatly appreciated!

TIA