VDP - Remove Snapshot

Good afternoon,

I have the following problem, I use VDP for the backups of my virtual servers. One of the virtual machines is not backed up since November 25th.

Viewing the VDP report indicates that it has an existing snapshot that can be viewed in the datastore.

I proceeded to create a snapshot, delete it, run the manual backup and it fails.

Additionally, run a vmotion to migrate the vm to another host and the backup does not run either.

Remove the machine from the inventory and add it again and likewise it fails. Modify the parameters of disk enableUUID to false and ctk to false.

And the backup is still not executed. Any help for this case.
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R@f@r P@NC3RVirtualization SpecialistAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
does the VM have an associated snapshot ?

is the VM parent disk currently connected to VDP appliance ?
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R@f@r P@NC3RVirtualization SpecialistAuthor Commented:
Good afternoon Andrew,

The disk is not connected to the VDP, but if it has a snapshot associated to the vm, annex printer screen.
Printer1.docx
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
okay there are at least two snapshots presents as shown on the disk.

Is the VM actually writing to these snapshots, or are they orphaned ?
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R@f@r P@NC3RVirtualization SpecialistAuthor Commented:
Good afternoon Andrew,

Can I delete those snapahot manually? Would it affect my vm after removing them?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
NO NO NO unless you want to damage your VM without knowing if they are in use ?

Is the VM actually writing to these snapshots, or are they orphaned ?

Please check my EE Tutorial, how to tell if the VM is writing and using these snapshots

HOW TO: VMware Snapshots :- Be Patient
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R@f@r P@NC3RVirtualization SpecialistAuthor Commented:
I do not understand your question andrew
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Okay, you need to check if the VM is actually using the files, and is currently writing to those files.

They could be in use, or left over. If they are in use, you must deal with the snapshot, if they are left over and not in use they can be removed (and orphaned files, will prevent VDP from backing up a VM).

To just delete them without any diagnostic, could be dangerous.

The method to check, is outline in my EE Article which I posted.
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R@f@r P@NC3RVirtualization SpecialistAuthor Commented:
Good morning Andrew,

When you indicate that I must validate if the VM is using the snapshot files, how can I verify that information? Should I download the VM log to verify it or is there another way to do it?

I remain attentive to your comments.

Best regards.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If you follow my EE Article I have posted, you can check the disk settings and determine if the VM is using the snapshot files?

do you know what a snapshot file is and looks like ?
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R@f@r P@NC3RVirtualization SpecialistAuthor Commented:
Andrew can you send me the article link to review it please
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
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R@f@r P@NC3RVirtualization SpecialistAuthor Commented:
Good morning Andrew,

Reviewing the snapshots again in the datastore, I validated that there are three snapshots that have the same size 17.408 KB and are from the dates of September 12 and 20, along with another one from November 25, which is the date where the virtual machine is not back more ever.

This virtual machine has three disks. Two of the snapshots are taking the disk 1 (1.vmdk) that contains the operating system and the other snapshot of the other disk (1_1.vmdk) but both the original disk (green), and the delta disk (red color) At the level of sizes they are different, that means that the VM is not writing about these snapshots, or am I wrong? Annex printer for your evaluation and you can clarify the doubt.

Checking the configurations of the disks in the virtual machine, does not indicate that they are writing in those instantaneous.

I remain attentive to your comments.

Best regards.
Snapshot.docx
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Okay, it looks to me that you are correct, the snapshots are orphaned and not in use, and this does prevent VDP from working, and backup up VMs, and Jobs running.

You can safely delete the snapshots, we generally are in favour of moving the snapshots to a temp folder, rather than outright deletion just in case, but choice is yours.
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