Dell NetWorker 19.9 Administration Guide

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Determining the volume for recovering cloned data

You can specify whether to use the original volume or a cloned volume to recover data in some recovery scenarios. In other scenarios, NetWorker decides which volume to use.

The following table provides details on when you can select the volume from which to recover data and when NetWorker selects the volume.

Table 1. Volume selection by recovery method
Recovery method	Volume selection
NMC Recovery wizard	Choose whether to specify the volumes or to allow NetWorker to select the volumes on the Obtain the Volume Information page of the wizard.
NetWorker User program	You can select the volume when you perform a save set recovery. NetWorker selects the volume when you perform a browsable recovery.
recover command	You can specify the clone pool for a browsable recovery or the clone ID for a save set recovery. If you do not specify the clone pool or the clone ID, then NetWorker selects the volume.

When NetWorker selects the volume from which to recover data, the recovery operation uses the following logic:

The highest priority is assigned to the volume (clone or original volume) that has a complete, non-suspect save set status. A complete save set that is suspect has a higher priority than an incomplete non-suspect save set.
If the volumes still have equal priority, then priority is assigned to the mounted volume.
If the volumes are mounted, then priority is based on the media type. The media types from highest to lowest priority are:
- Advanced file type device
- File type device
- Other (such as tape or optical)
If the volumes are not mounted, then priority is based on the media location. The media locations from highest to lowest priority are:
- Volumes in a library.
- Volumes that are not in a library but are onsite (or, the offsite flag is not set).
- Volumes that are offsite (or, the offsite flag is set).
  
  To specify that a volume is offsite, use the nsrmm command. For example:
```
nsrmm -o offsite -V volume_id 
				  
```
  where volume_id is the ID of the volume to mark offsite.

The volumes that are required for recovery appear in the Required Volumes window of the NMC Recovery wizard and the NetWorker User (Windows) programs.