Only 11 months after I bought them, 1 of my hard drives just started grinding away like a jet engine...
I have OS on RAID 0 and data on RAID 5.
So the data should be safe (unless I'm hearing 2 drives grinding away), but the OS volume is in serious danger.
I have a spare disk that I can replace the bad one with, and I have a backup of my data (on the spare disk). I'm wondering if I should try converting the RAID 0 volume to RAID 5 before replacing the disk or if I should do another backup (the other one is a couple months old)? Which would be safer? I'll probably buy another drive rather than use my backup drive as a spare.

I probably should have had 2 RAID 5 volumes to begin with... But if I lose the OS volume it's no big deal, just the pain of reinstalling the OS and all my software (or at least restoring the OS volume from the old backup).