Unexpectedly Unavailable Disk

[PhiloEpisteme]

I recently moved my system which required a reboot. Prior to booting the machine after the move was complete I ensured that all of the drive trays in the CSE846 were fully pushed in, just in case I had hit the release trigger during the move. I was also careful while moving the server so as not to bang it against anything or jostle it.

When booting the machine one pool booted into a degraded state due to one disk being listed as "UNAVAILABLE". I checked the disks and checked the SMART output for the offending disk and found no issues. I went back to the pool and clicked the disk and selected "Online" The disk came back and is working perfectly now without the pool being degraded.

So, I'm stuck wondering what could've caused the disk to become unavailable? The case itself uses a backplane connected to the HBA via a single SAS port, so if the plug had become loose on the backplane I would've expected all of my drives to have issues. I suppose a plug could've become loose on the HBA? But I didn't reseat the cable prior to attempting to online the drive.

I don't recall the make/model of the drive but it is a SATA drive connected to a Supermicro SAS846EL2 backplane connected to a single LSI-9207 HBA on an X11SSM-F board.

 

[sretalla]

Sounds like something a bit strange. It has been a long time since I thought about it, but there used to be issues when moving systems that if long-running disks were turned off, there was a risk of the heads becoming stuck... maybe this happened and you were able to un-stick it by trying a second request with the online command.. who knows.

Keep a close eye on that disk though.

 

[PhiloEpisteme]

Keep a close eye on that disk though.

So far a long SMART test and scrub have revealed nothing.

It has been a long time since I thought about it, but there used to be issues when moving systems that if long-running disks were turned off, there was a risk of the heads becoming stuck...

When I get off work I'll grab the model number of the drive. I am using a few older desktop drives.