Woke up this morning and my Drobo volume wasn’t mounted. Reboot everything, still won’t mount. Opened a ticket with an attached diagnostics file. Noticed there was a new firmware level (1.3.6), did the upgrade, it applied, still won’t mount.
Ran disk utility which sees the drive. Dashboard sees it as all green also. Can’t force mount the disk in disk utility. Tried verify disk. Lots of errors. Tried repair disk, disk is unrepairable.
This is pretty much the last straw for me, it’s going in the bin. I reckon what happened is the previous ticket showed bay 3 and bay 4 drives (WD20EADS) having spurious problems. Drobo was doing random short rebuilds to handle it but it never said what was happening, i.e. two drives were giving problems or having timeouts. Everything stayed green.
At Drobo supports request, I replaced the drive in bay 3 on Friday and that went well. I’m waiting for the advance RMA WD drive to arrive this week to replace the bay 4 drive figuring with 3 good drives, I’m safe even if bay 4 goes but obviously, that was optimistic.
How can a RAID device lose data without a reported media failure? Obviously, not very happy right now. Dashboard was running overnight and there are no emails suggesting a media failure. It’s hard to spin this in a good way. It’s attached to an iMac using USB, the cable is fine (firmware worked, everything else works, it’s attached directly to the iMac, no hub). This is a vanilla setup.