Re: [VBox-users] Failed to delete the snapshot: disk ... has more than one child hard disk

[Mark C. <mar...@gm...>]

On 18 July 2012 21:04, Voelker, Bernhard
<ber...@si...> wrote:
> I have 4 snapshots of my VM, all nicely in consecutive order (A-B-C-D).
> I want to delete snapshot 2, but VBox returns this error:
>
>   Failed to delete the snapshot 2012-04-03: ECS-IDE v3.13 rc1 of the virtual machine ecsidevm2.
>
>   Hard disk 'D:\ECSIDEVM\ecsidevm2\Snapshots/{c674a912-a1d4-4025-8543-0079e54e42b7}.vdi' has more than one child hard disk (2).

Use the Virtual Media Manager (File > Virtual Media Manager, Ctrl+D)
and expand the tree under the hard disk(s) concerned.

You will likely see a tree structure, where one of the nodes (the one
that says "... (Snapshot B)" in the Attached To label) has TWO
children underneath it.
One of those child VDI files corresponds to snapshot C, and one is
likely an orphan.

Click on the one that has "Attached to:" = "Not Attached", and remove it.

Now the tree should look like a linear chain (every node only has a
single child), and you should be able to now delete snapshot D.

Take a backup/copy of everything before, in case it goes wrong!

-- 
Mark