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Unable to poweron the VM. (Failed to lock the file)

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I have encountered may issues like where after some upgrade or migration we were unable to power on the VM.

Figure 1


An error was received from the ESX host while powering on VM HSSVSQL01. Failed to start the virtual machine. Cannot open the disk '/vmfs/volumes/578d835c-18b2c97a-9b0d-0025b5f13920/SAMPLE1_cloud/000000.vmdk' or one of the snapshot disks it depends on.

Failed to lock the file
In above Figure:1, where while powering on the VM, its prompt for an error.
Well, there are several reason for where the VM unable to poweron and you can find many article on this.
Here in this article we will discuss to resolve this issue.
Please use below step to resolve the disk lock issue



 Checked that VM is running on snapshot if its getting error " VM Consolidation required".

Checked the snapshot manager if its showing any snapshot. If yes, try to delete the  snapshot.

Verified the same from Esxi cli to identify whether it has delta files are located on all or some of the dis…