Left side of XServe Raid disappeared.  Please help

Hello,
During the cleanup of a bunch of data on right side of my XServe Raid (two raid 5's with spare, one on the left side, one on the right side), the server became very unresponsive (Windows 2k server), to the point where it wouldn't even shut down. I reset the box but when it came back up the left side of the XServe was gone (showed up as a missing drive in disk manager).
RAID Admin shows that there is no raid on the left side and shows all drives as spares. I've just completed copying all the data off of the still functional right hand side and can now attempt to recover the left side (if that's even possible?). I saw a suggestion that full power offs and restarts (multiple times) has helped another poster. So far I have powered down the XServe Raid 2 or 3 times without the left side raid showing up. I'll be trying a few more times shortly.
I believe there is an option to recover the raid in RAID Admin? My XServe has an older version of firmware that does not support the RAID Admin Utilities. I have been nervous of upgrading the firmware and possibly irreversibly losing the raid if it isn't already irreversibly gone.
Can anyone offer any suggestions?

No luck on the reset, both via Raid Admin and the reset button on the XServe Raid.
A restore of most of the data has completed onto another storage device.
I can see a power spike or something wiping out the config of both arrays, but to have only one side just disappear and with no way to re-read the raid configuration from the drives, I can't trust the XServe RAID anymore and we won't be going back to using it.
I certainly appreciate you taking the time to offer a suggestion Camelot!

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