April 19, 20242 yr Hey all! I recently upgraded my Unraid with a SAS card and a new enclosure. Unfortunately in the process I lost a drive. No big deal, I just moved all the data off that (virtualized) drive and bought a new one. Now I'm trying to install that new drive but, as it's secondhand, I wanted to do a full preclear. However, despite it being a 10TB HGST Ultrastar He10, the Unassigned Devices plugin is showing me one of my WD 14TB drives (with the same serial) there instead. The sd mount point is different, at least, but I don't dare to start to try and clear the drive until I'm positive Unraid knows what it's looking at. I'm going to try to unplug and plug into a different SAS port and see if that fixes things, but this is weird, right? unraid-diagnostics-20240419-1205.zip
April 19, 20242 yr Community Expert No 14TB drives are showing up in the SMART reports suggesting they are no longer online. The fact that UD has one showing with the same serial but a different ID suggests that drive dropped offline and then reconnected. You probably need to shutdown the server; check power and SATA cabling to both of them; and then reboot to see if either of them is now showing up as expected. Posting new diagnostics at that point might be a good idea.
April 19, 20242 yr Author Ok, so I definitely clicked 'clear disk' before I realized that was actually a disconnected disk. So now I'm sat in emulation mode, but I want to be VERY careful to not lose any data... Should I re-attach this disk to the array? If so, will that let the data rebuild? When I booted it started in missing/disk emulated mode, so I know the data's still (virtually, if not physically) there but I want to make sure I don't overwrite it now... Edit: to clarify, it seems that new 10TB drive that arrived is DOA or just not registering for some reason or another, but in the process of installing it I swapped about my cables and this 14TB drive is shucked and therefore requires a specific power cable so it didn't come up fully and then, thinking it was the new 10TB drive, I accidentally cleared it. Edited April 19, 20242 yr by polishprocessors
April 19, 20242 yr Author Solution Ok, I found this, which I believe is the correct procedure: https://docs.unraid.net/unraid-os/manual/storage-management/#rebuilding-a-drive-onto-itself It just looks like that 10TB drive is DOA and, because of my mess-up, I'll need to rebuild the 14TB drive then look into replacing the 10TB as well
April 19, 20242 yr Community Expert Make sure the emulated disk is mounting and contents look correct before rebuilding on top.
April 19, 20242 yr I'm adding an 'Array' indicator to the mount button to indicate a possible array disk dropped offline so UD won't allow any operations on the disk. The device sdX indicates that Unraid doesn't see the disk as an unassigned disk.
April 19, 20242 yr Author Right, that would have been useful-thanks! Fortunately I managed to realise my mistake before I'd done anything catastrophic and so only need to sit through a 24h rebuild instead of having to rely on backups for anything...
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