Does passing through harddisk disable the vm's snapshot functionality?

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rampage

Active Member
Oct 17, 2016
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Does passing through harddisk disable the vm's snapshot functionality?

Hi,

I have a vm, used to be able to take snapshots fine.
But now the snapshot button is greyed out.
The only special point I can think of is it has passing through harddisks.
So with passing though hd, can I still do snapshots?

Cheers,
 
rampage said:
Does passing through harddisk disable the vm's snapshot functionality?

Hi,

I have a vm, used to be able to take snapshots fine.
But now the snapshot button is greyed out.
The only special point I can think of is it has passing through harddisks.
So with passing though hd, can I still do snapshots?

Cheers,
Click to expand...

snapshots require storage support (e.g., ZFS, Ceph, LVM-Thin) or qcow2 format - if you pass through a host disk as block device, neither is true, so snapshotting is not possible.
 
Hello,

I have the same "issue". I have a OpenMediaVault VM with its boot disk based on CEPH and with 4 disks passed through.
I'd like to snapshot the boot disk before maintenance/upgrade/tests/whatever and the option is greyed out.

As I've backup & replication disabled the 4 "physical" disks why shouldn't I be able to snap the boot disk ? Maybe you should add another tick box for "snapshot" true/false in hard disk option or let snapshot to be taken on the "snapshot compliant" devices only ...

Thanks in advance for your help/thoughts,

Olivier
 
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