STrange error

Check the event logs for each of the 2 controllers.  Both have a windows-based utility you can use to see them. (If you have not downloaded & installed them, you need to do this anyway as it will tell you such things).

But the "AAC" driver is used by adaptec, so that is the one you need to care about.   Could be anything from a transient condition to a problem with enclosure services (do you have an external intelligent enclosure?).   But anyway the adaptec event log will give you specifics.  

I checked the Adaptec logs nothing.  But I was running a backup at the time.  But still no errors

I have a Dell raid array external attached via the adaptec card to the server.

Actually there were no messages at all. the only thing I found was in the event viewer and I only new about it because the machine froze.  Strange but I was doing a backup at the time so I'm wondering if that may have had something to do with it.  

I'll contact Adaptec to see if something needs updating of there's a problem.  Thanks...  I'll give you the points and keep you posted.

If you have a tape drive or autochanger on either controller, then put it on a separate controller.   That WILL cause lots of problems for an adaptec (and it is no picnic for any other controller vendor either)

There is no tape drive or auto-changer.  Its a client. The server that backs up has all of that. I have the Remote Agent Running on it.

Called Adaptec as you suggested they helped fix the problem. thanks1