Config edit failed on vSphere VM

Ben Conner
Ben Conner used Ask the Experts™
on
Hi,

Started having problems with a VM in vSphere a few minutes ago.  I use Veeam to replicate them to a failover host.  I decided to check the replication VM and got the following:

"File system specific implementation of Ioctl[file] failed
Failed to start the virtual machine.
Cannot open the disk '/vmfs/volumes/5bc520fe-f0c42cd2-8d13-0cc47a9fd93a/SMTest_replica/SMTest_10-000001.vmdk' or one of the snapshot disks it depends on.
The parent virtual disk has been modified since the child was created.  The content ID of the parent disk does not match the corresponding parent content ID in the child
Module 'Disk' power on failed.
Cannot open the disk '/vmfs/volumes/5bc520fe-f0c42cd2-8d13-0cc47a9fd93a/SMTest_replica/SMTest_12-000001.vmdk' or one of the snapshot disks it depends on.
....

Never seen this before.  ?

--Ben
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AlexSenior Infrastructure Analyst

Commented:
I think you may have a snapshot on the VM if you do consolidate everything into the parent disk.
Ben ConnerCTO, SAS developer

Author

Commented:
Ah.  I think I know what's happening.  Veeam is still trying to delete the snapshot on the original VM and there is a drive under it that may be failing.  So it still has a 'Replica Working Snapshot' in place on the replica VM.  That may be the issue.  Will wait for a while to see if the snapshot deletion completes, and then migrate the VM to another drive.  Along with the other VMs on that drive.  

Will let you know if that was the root cause when the snapshot removal completes.

Thanks!

--Ben
AlexSenior Infrastructure Analyst

Commented:
No problem, if it doesn't fix it let us know and we'll help out :-)

Regards
Alex
CTO, SAS developer
Commented:
The issue was indeed the helper snapshot on the replication target.  Once it finished I was able to edit the configuration with no problem.  Sorry for the panic.  Am having to chuck VMs off this drive onto other ones in a hurry.  Not my first choice of what I do hours before going on vacation.

--Ben

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