Backup all cluster on external disk


New Member
Apr 27, 2023
I would like to backup more than one node of the cluster on the same external device.
To backup a single node was not a problem I do so:

As suggested I have wipe and create the directory storage directly from the UI selecting [your node] > Disks > Directory > Createdirectory.
Than I have made backups.
But after that I needed to go into shell for dismount device umount /dev/sdb.
Than I hade try to connect again.
I reconnected and in UI sdb is present again (but not mounted).
To remount I need to do it via shell
mount /dev/sdb1 /mnt/pve/BackupCluster

Everithing works.
It woluld be nice to have under menu 'folder' a dismount button and a remount button.

Now the problem.
I can create an external disk for each node.
But if I try to connect the same disk?
Now I have do so.
I have created on new external disk a backup device (same system and same name as first node), only on sdf and not sdb.
Tryed to dismount the disk and mount the previus, but after its non mounted (mybe for superblock).
Some Idea?

If there's no chance, I'll use an external disk for every node.


The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!