Ok, I have a perplexing issue with one of my stand alone media agents. Windows Server 2003, Ultrium 960, Commvault 6.1 with all updates. No matter what type of backup I launch, after it writes a few gigs, I get the "Error occured in Library" message. There is nothing in the event viewer whatsoever, nothing in the commvault logs either. We've changed the drive, SCSI card, updated the firmware and all drivers for the entire system - still no luck. I was able to keep resuming a file system backup today until it reported success, but I don't know how good I feel about it to be honest. Any ideas? Commvault is working on this, but has found nothing yet and I get the typical, "this sounds like a hardware issue" excuse so far.