I have installed Proxmox on default settings, and now have local-lvm thin volume. The problem I have is I can't select different disk image than Raw, which mean I can't schedule snapshots. Is there any option to change that without re-installation?
Raw disk image only available
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Raw images stored on lvm-thin are thin provisionned and allow snapshots to be taken. What are you missing?
But snapshots can't be taken on to the same LVM-Thin (3,5TB) volume. The other local volume has only 100GB size.
I don't understand what you mean. Yes you can take as many snapshots as you want on the same lvm-thin volume
How?
https://ibb.co/dh4Skz
And I can't enable Backup/Snapshot on this volume. If I go to VM and select backup it also want to take a snapshot on to 100GB volume only.
Ok, so you're talking about backups (dumps), not snapshots. You can still achieve it, with some manual commands. From the command line, create a thin volume, then format it (ext4 or xfs for example), mount it somewhere and declare a new storage of type "directory", which can handke dumos
So you're not interested in knowing how to achieve what you want ? Ok.
FYI normal (non thin) LVM would be exactly the same (with less features as there would be no thin provisionning, and no snapshots)
FYI normal (non thin) LVM would be exactly the same (with less features as there would be no thin provisionning, and no snapshots)
please take a look at our docs for information about lvmthin/directories etc. https://pve.proxmox.com/wiki/Logical_Volume_Manager_(LVM)
also, making backups onto the same disk as where the vms are, is not good practice and won't protect you against a broken disk
also, making backups onto the same disk as where the vms are, is not good practice and won't protect you against a broken disk