Use datastore resignaturing if you want to retain the data stored on the VMFS datastore copy.
When resignaturing a VMFS copy, ESXi assigns a new signature (UUID) to the copy, and mounts the copy as a datastore distinct from the original. All references to the original signature from virtual machine configuration files are updated.
When you perform datastore resignaturing, consider the following points:
- Datastore resignaturing is irreversible.
- After resignaturing, the storage device replica that contained the VMFS copy is no longer treated as a replica.
- A spanned datastore can be resignatured only if all its extents are online.
- The resignaturing process is fault tolerant. If the process is interrupted, you can resume it later.
- You can mount the new VMFS datastore without a risk of its UUID conflicting with UUIDs of any other datastore from the hierarchy of device snapshots.
- Unmount the datastore copy.
- Perform a storage rescan on your host.
- In the vSphere Web Client navigator, select .
- Click the New Datastore icon.
- Enter the datastore name and if necessary, select the placement location for the datastore.
- Select VMFS as the datastore type.
- From the list of storage devices, select the device that has a specific value displayed in the Snapshot Volume column.
The value present in the Snapshot Volume column indicates that the device is a copy that contains a copy of an existing VMFS datastore.
- Under Mount Options, select Assign a New Signature and click Next.
- Review the datastore configuration information and click Finish.