When running a recent (full) backup on our SQL Server, 9.1 failed and hung in a state of doing nothing. I killed the job and restarted it - this second job also hung and did nothing. Upon a full reboot of the machine running 9.1, I restarted the job again and ONLY THEN did I receive an error notice saying that the media was full.
I cleared out some old data, and the job then ran fine.
Is there a hotfix / workaround that can keep this from happening in the future, so that error notices notify us more reliably?