VM disk cannot be resized- Failed to extend the disk
Issue:-
-With the vSphere Client, if you edit a VM's settings and then select one of its virtual
disks, the option to resize the disk is greyed out.
-When trying to extend the disk using vmkftools for resizing, you will receive the below
error:
Failed to extend the disk. Failed to lock the file.
-When you extend the disk using vsphere client, the change is not getting reflected.
Root cause:-
The VM will be having a snapshot. Because when a snaphot is taken the actual VMDK file
will be locked and the changes will be written to a new delta file. Due to this reason, the
actual VMDK file could not be resized.
Another possible reason: If the disk is IDE, the change may not get reflected. The
resolution step for this issue is mentioned here
Resolution:-
Remove the snapshot file and then try to resize.
-With the vSphere Client, if you edit a VM's settings and then select one of its virtual
disks, the option to resize the disk is greyed out.
-When trying to extend the disk using vmkftools for resizing, you will receive the below
error:
Failed to extend the disk. Failed to lock the file.
-When you extend the disk using vsphere client, the change is not getting reflected.
Root cause:-
The VM will be having a snapshot. Because when a snaphot is taken the actual VMDK file
will be locked and the changes will be written to a new delta file. Due to this reason, the
actual VMDK file could not be resized.
Another possible reason: If the disk is IDE, the change may not get reflected. The
resolution step for this issue is mentioned here
Resolution:-
Remove the snapshot file and then try to resize.
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