UUID for missing disk

[Yzftox]

Hello, I have a bit of an issue I can't figure quite out.

To make the long backstory short, I got Unraid a few years ago, messed around with it for a bit but after a while I had some issues with unclean shutdowns. I didn't really need the server that much so the troubleshooting was a little half hearted. After a few years I got it sorted out (faulty PSU), but I now have Disk 5 showing as missing. The thing is the HDD is not installed, and I frankly don't remember what provoked me to remove it even. In trying to search for it and find out what happened I would like to know if there is a way I can find the UUID for the missing disk. Sorry for this weird problem, as you might tell I'm not an expert

[trurl]

attach diagnostics to your NEXT post in this thread.

[Yzftox]

Sorry if this is the wrong approach when attaching diagnostics

belphegor-diagnostics-20231103-0020.zip

[Yzftox]

I also tried BLKID, but I'm not sure how Disk 5 would be shown here. Is it /dev/md5?
Sorry for being such a noob
 

/dev/sda1: LABEL_FATBOOT="UNRAID" LABEL="UNRAID" UUID="825D-7F09" BLOCK_SIZE="512" TYPE="vfat" PARTUUID="5092863d-01"
/dev/loop1: TYPE="squashfs"
/dev/sdf1: UUID="81714aed-b472-4aaf-9843-0661a0441a2a" BLOCK_SIZE="512" TYPE="xfs"
/dev/sdd1: UUID="73db68a4-61fe-460d-bfd0-1240b7d35ff2" BLOCK_SIZE="512" TYPE="xfs" PARTUUID="25b91b5b-6628-4900-b6d0-45dfed85a551"
/dev/sdb1: UUID="be6b8634-a60c-4f65-aef3-8bc8648b8606" BLOCK_SIZE="512" TYPE="xfs"
/dev/md4: UUID="be6b8634-a60c-4f65-aef3-8bc8648b8606" BLOCK_SIZE="512" TYPE="xfs"
/dev/md2: UUID="81714aed-b472-4aaf-9843-0661a0441a2a" BLOCK_SIZE="512" TYPE="xfs"
/dev/sdg1: UUID="15c6734b-2124-4d96-af0e-47105c7f30fa" BLOCK_SIZE="512" TYPE="xfs"
/dev/loop0: TYPE="squashfs"
/dev/sde1: UUID="b1a73ac2-1201-4073-9f0e-f26e33ca0d81" BLOCK_SIZE="512" TYPE="xfs" PARTUUID="7a219a2d-9ce4-4204-acf2-2e99883d1f31"
/dev/sdc1: LABEL="Programmer" BLOCK_SIZE="512" UUID="5A26EB7B26EB5693" TYPE="ntfs" PARTUUID="3881b4aa-01"
/dev/md5: UUID="e8a0edf4-40a5-4e22-b960-2a971ca9fea5" BLOCK_SIZE="512" TYPE="xfs"
/dev/md3: UUID="15c6734b-2124-4d96-af0e-47105c7f30fa" BLOCK_SIZE="512" TYPE="xfs"
/dev/md1: UUID="b1a73ac2-1201-4073-9f0e-f26e33ca0d81" BLOCK_SIZE="512" TYPE="xfs"
/dev/loop2: UUID="dd2d30b1-a33b-44e1-8d29-d864cfac3f7f" UUID_SUB="b75a34cb-2327-416e-8ce3-60a2859a7209" BLOCK_SIZE="4096" TYPE="btrfs"
/dev/loop3: UUID="e51c928f-d614-4b2b-8b34-44f64bca362c" UUID_SUB="fb47b67a-e146-4933-bd4e-744b29336261" BLOCK_SIZE="4096" TYPE="btrfs"

 

[JorgeB]

Disk5 is md5, not totally clear what you mean by finding the UUID for the disabled disk, what is the purpose?

[Yzftox]

Thanks a lot! I was just trying to figure out if I had repurposed the disk for something else. Knowing the UUID I was thinking I could check the disks I've laying around to see which one is my missing Disk 5. It's a mess lol

[JorgeB]

The UUID is for the filesystem, it's not possible to know the disk model/serial at this time, only if you hadn't started the array when the disk was initially missing.

[Yzftox]

Aha, thanks for the info! I was hoping the disk might still have the filesystem and its UUID intact, but at this point I guess it's futile to search any further. But given how parity works on Unraid, I should be fine just removing the missing Disk from array?

Edited November 3, 2023 by Yzftox
I wanted to elaborate more without making another post

[JorgeB]

27 minutes ago, Yzftox said:

I should be fine just removing the missing Disk from array?

 

There is some data on that disk:

 

Filesystem      Size  Used Avail Use% Mounted on
/dev/md5        932G  238G  694G  26% /mnt/disk5

 

If it's not important you can just do a new config without that disk and re-sync parity, if it's important you can copy/move the data first to another array disk or even outside the array.

[Yzftox]

OK, thank you very much! I suppose I'll search a little longer to figure out what happened, I can't remember why I would remove the disk in the first place but it should be around somewhere.

[JorgeB]

You do have this disk unassigned:

 

WDC_WD10EZRX-00L4HB0_WD-WCC4J2140527

 

Same capacity of the missing disk, so most likely this was disk5 before.

[Yzftox]

Thank so much, that helps me alot! Now I know better what to look for!

[trurl]

4 hours ago, JorgeB said:

if it's important you can copy/move the data first to another array disk or even outside the array.

Or rebuild it to another (or even the same) disk.

 

2 hours ago, JorgeB said:

You do have this disk unassigned:

 

WDC_WD10EZRX-00L4HB0_WD-WCC4J2140527

 

Same capacity of the missing disk, so most likely this was disk5 before.

SMART for this disk looks fine. You might be able to mount it as an Unassigned Device to see what is on it, then decide whether to rebuild or whatever

[Yzftox]

Thanks! The unassigned disk is something else, but how things are looking now I'm gonna rebuild the missing disk onto a new one. You guys have been really helpful, much appreciated!