odd lvm behavior

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pattonb

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Oct 20, 2020
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I have a proxmox 6.3-4 host, I have a vm with several storage locations ( raid arrays). It has been running fine.
last week, something happened and needed a reboot. So i took the vms down, and rebooted, it did not come back
up. after troubleshooting, it appeared a share disk ( I am not sure on the proper terminology), was not to be found.
so, I edited the /etc/fstab on the vm. and everything came back up without issue. except the one disk/partition did not show up, as expected.
so, I tried to add the disk in again, via command line, (using the same syntax as I had previously).
Code: 
qm set 101 -scsi2 /dev/disk/by-uuid/a5c9f726-b082-46b8-a91e-76e2263054f0

however, the uuid seems to have disappeared. I don't see it on the host ( /dev/disk/by-uuid). I am not sure why this would occur.

the fdisk -l, etc. shows all raid arrays ( yes in the host I have 3 raid arrays) there, but I don't see any uuid's corresponding to what was there the previous day.

I am at a lost on what process/path to follow know. any ideas.

thanks kindly
 
A bit more information is needed. What kind of RAID do you use? mdraid? What is the status of the RAID? Does the disk show up somewhere else? (/dev/sdX or /dev/disk/by-*)
 
sorry, the explanation is a bit lacking. The raid is raid 1, (hardware). I have been investigating, and I think what happened, was, I created a couple of new vm's and somehow they used the storage of that raid 1, I have 3 raid arrays on the server. I have since removed those vm's , and am not using the lvm for anything. There is a 3ware utility 3dm2, and last I looked, a few dys ago, it showed all arrays as 'OK' . now I am unable to access the web page, hmmmm. I suspect when I created the vms, it did something to the raid array/lvm, possibly used that for local storage, It shouldn't normally be used for new vm's .I haven't looked a whole lot further. the lsblk, shows the following. the array/partition in question is sdc, I had setup the array as 1 partition, the full size, now it shows a 210 g partition, I am intersted in seeing what is/was on the remainder of the disk.
 

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I checked the fstab of the vm, that had used the disk, and that uuid is not to be seen on the host.
the lvm does show up, using a different uuid, than it had 10 days ago. I can supply that info, if it helps
 
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