I have so far replaced three drives in our DELL/EMC ML3 Tape Lib and still experiencing the same problem. Currently, there’s one valid drive that is working fine - when it comes to the other one, it is mounted and immediately unmounted after a couple of seconds - one try after another in an endless loop.
According to DELL, there’s nothing in the library log that would indicate the root of the problem (the log is clean) - they send me another drive and then the case is closed until the issue rises again.
I tried swapping the drives in slots but the problem is following the same drive no matter the slot. At this point, I’d like to exclude software-related cause of the issue.
- Currently, the number of errors associated with mounting and unmounting the drive is way over its threshold; that might be the reason why CV is ignoring the drive completely - how can I reset the counter?
- Is there a particular procedure I should follow when replacing a drive? I can see there’s an option ‘Mark drive as replaced’ (when right click on the drive) - is it necessary to go with this option after replacing a drive? I believe the library scans the drives immediately after they have been replaced or after after I have reset it - what about Commvault?
It’s also technically possible that I’m not getting brand new drives, it’s unlikely that I would get three faulty drives in a row though. I always update the firmware in the new drive I get.