Copy data between HDDs without access

[ejimenez]

hello,
I had a problem with a proxmox virtual machine, Zentyal (manage samba), I have a disk with 2TB of information but the partition table was deleted and I can't access it if I format it first.

I need to copy the data to a new disk to make a backup, how can I do it without formatting the disk with 2TB of data?, thanks.

 

[fiona]

Hi,
I'm afraid you can only make a bitwise copy of the disk if you don't have the partition/filesystem information. But it's still worth doing before attempting recovery. Then you can use https://www.cgsecurity.org/wiki/TestDisk to try and recover the partition table.

Can you share the VM configuration qm config <ID> with the ID of the VM and output of pveversion -v? Did you run backups of this VM? If you are using SATA this might be: https://bugzilla.proxmox.com/show_bug.cgi?id=2874

What also would be interesting is the start of the disk to see how the corruption looks like. You can use pvesm path <storage>:vm-<ID>-disk-<N> to get the path and then

qemu-img dd bs=512 count=256 if=/path/to/disk of=/tmp/dump.raw
zstd /tmp/dump.raw

to get a compressed (for easier uploading) dump in /tmp/dump.raw.zst.