I received an Exception Small_bus_error today and found that some of the footage was lost.  The video and right channel audio was missing.  However, the left audio channel was still present.  All three are located on the same drive.  I restarted the computer and when I first got back into OSX an error appeared for my RAID drive stating that I should back up and reformat.  I checked disk utilty and didn't see anything unusual.  All the drives were online.  I ran disk warrior and rebuilt the RAID drive.  I restarted the computer and didn't receive the OSX warning to backup and reformat. I still received the exception error when I started Avid.  I restarted again and haven't received any errors.

What scares me is that when I go into media tool, and do a search on the drive for media files, precomputes, and master clips the search comes back with no files.

Any suggestions would be appreciated!  Thank you.

You may want to trash the 2 database files in the directories so Avid can re-build them on launch.

only a suggestion, but possibly the cause.

by 'rebuild the RAID' what exactly do you mean?  I assume that rather aggresive step zeros out your RAID, no?

This is kind of mysterious.  I had one clip that was lost, and decided to batch capture it since it was short.  I clicked batch capture and it didn't even start the tape.  I received a window stating that the footage was captured.  It showed up in my source window, but not in my timeline.  I restarted Avid and everything linked up.

Any suggestions on how this happened?

Disk Warrior has the option to rebuild a drive which repaired the total file count, available disk space and attribute bits of the volume information.