A virtual machine hard disk in vSphere v.5 or v.6 can be configured in three different modes:
- Dependent: the default disk mode. The disk is included in snapshot.
- Independent – Persistent: Changes to the disk are immediately and permanently written to disk. The disk is not included in snapshot.
- Independent – Nonpersistent: Changes to the disk are discarded when power off. The disk is included in snapshot.
To change a VM hard disk to Independent – Persistent mode in vSphere v.6 Web Client:
- Power off the VM
- Delete any snapshots that currently exist
- Right-click the VM and click Edit Settings
- Under Virtual Hardware tab, expand the hard disk
- In Disk Mode, select Independent – Persistent
- Click OK
To verify a VM hard disk excluded from snapshot:
- Take a snapshot of the VM
- Right-click on the datastore storing the VM and click Browse Files
- Browse to the VM folder
- If the disk is not set to Independent – Persistent mode, a VM-00001.vmdk file is created for the disk
- If the disk is set to Independent – Persistent mode, this file will not be created
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