Useexistingbase

The useexistingbase option is used when you back up snapshots that are on NetApp filer volumes. The useexistingbase option indicates that the latest snapshot that exists on the volume being backed up, is to be used as the base snapshot, during a snapshot differential backup operation.

If this option is not specified, a new snapshot is created on the volume that is being backed up. Because target filer volumes are read only volumes, useexistingbase must be specified when performing snapshot differential backups of target filer volumes. If useexistingbase is not specified, snapshot differential backups of a target filer volume fail because the new snapshot cannot be created on the read only volume.

When backing up target filer volumes, use both the useexistingbase option and the diffsnapshot=latest option to ensure that the most recent base and most recent differential snapshots are used during the volume backup

Supported Clients

AIX operating systems Linux operating systems This option can be used with supported x86_64 Linux and AIX® clients.

Windows operating systems This option can be used with supported Windows clients.

Options File

This option is only valid on the command line.

Syntax


>>-USEEXISTINGBase---------------------------------------------><

Parameters

This option has no parameters

Examples

Options file:

Does not apply.

Command line:

dsmc incr \\DRFiler\UserDataVol_Mirror_Share -snapdiff 
  -useexistingbase -basenameshotname="nightly.?"