I have a drive—part of a RAID 1 mirror—that has two bad blocks. Adaptec Storage Manger e-mailed me when it detected the blocks. It shows 4 medium errors for that drive, but state is still “optimal”.
This is my first time using Adaptec RAID controllers. I don’t know if an occasional bad block is normal, or if I should immediately replace that drive.
Update: The drive failed later the same day!
The disk subsystem is:
- Adaptec 6405 with ZMM
- (2) Seagate near-line SAS drives (ST31000424SS)
The other drive hasn’t reported any bad blocks yet. I am running a consistency check.