Unraid VM's root disk is unbootable and shows no partitions available after config changes.

LilFourE · May 17

Hey, so I working on a VM which is running on an Unraid server. I powered the machine down using the Unraid controls (clean shutdown, no force stop) and changed the name, as well as removed the install ISO from the virtual CD-ROM (I'd forgotten to remove it after setting up the VM). The boot drive is still present in the config. Upon attempting to boot the VM, the system boots into BIOS since the disk doesn't have any partitions to boot from. I confirmed this by booting into a live Debian CD and using rescue mode. fdisk shows no partitions on the disk:

# fdisk -l
Disk /dev/sda: 70.98 GiB, some bytes, some sectors

Disk model: QEMU HARDDISK
Units: sectors of 1 * 512 = 512 bytes, Sector size, etc

shows no partitions, even though the virtual drive is showing up. I searched around for anything that might tip me off to what's going on, but I am at a loss. Hopefully someone here might know what is going on with this silly goose - I'll also provide other screenshots if needed. (edit: hope this is the right thread for something like this)

Kilrah · May 17

Check you're using the right vdisk, by default the vdisk is put in a folder with the vm name, if you renamed the VM it might not have followed /created a new one.

LilFourE · May 17

55 minutes ago, Kilrah said:

Check you're using the right vdisk, by default the vdisk is put in a folder with the vm name, if you renamed the VM it might not have followed /created a new one.

I went ahead and renamed the VM to its original name, which strangely, seemed to have restored the disk image in /mnt/user/domains/<domain>/vdisk1.img, but it still will not recognize it as bootable or show any partitions. I used "cat" to see if there was anything in the file, the disk image definitely contains the data for the VM - so that's good I suppose? I'm going to see if I can just recover the data out of the image and rebuild the VM.