Update: Looks like one of the drives has suffered a catastrophic failure. So the libraries will be down while we restore from backup.
Last I heard, IBM was the last company you would ever want to be making your hard drive.
They were suffering an absurd number of failures and losing money hand over fist.
Anytime I buy a drive, when asked what brand, I say 'I'm not fussy, as long as it's NOT IBM'...