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NetVault Plug-in for SnapMirror to Tape 10.0.5 - User Guide

Configuring default settings

Start the Backup Job Wizard, and click Create New next to the Selections list. Open the NetVault Backup Server. Select NDMP SnapMirror to Tape, and in the Actions list, click Configure.
In the Navigation pane, click Change Settings. On the Configuration page, click Server Settings, and then click Plugin Options.
If you select the Create New Snapshot check box after selecting a snapshot in the selection tree, the plug-in reports an error and fails the job. When you clear this check box, the plug-in reports an error, but does not fail the job.
Click OK to save the settings and close the dialog box.

Configuring media block size

On the filer, set the DATA_BLOCK_SIZE variable.
Start the NetVault WebUI, and in the Navigation pane, click Manage Devices. In the list of devices, click the applicable drive (or the corresponding Manage Device icon), and then click Performance.
In the Drive Performance Options dialog box, configure the following setting:
Drive Block Size: Type or select 240K or 256K depending on the value set for the DATA_BLOCK_SIZE variable. Changes to this setting are only applied to tapes that are blank or relabeled.
Open the configuration file ndmpsmtversions.cfg in a text editor. You can find this file in <NetVault Backup home>/config.
Set the Filer Block Size Preferred parameter to FALSE. By default, it is set to TRUE:
Linux and UNIX®: If necessary, increase the amount of shared memory, typically the shmmax setting.
Windows®: If necessary, increase the MaximumSGList setting for the tape device. For more information, see the relevant operating system and SCSI card documentation.

Backing up data

About backup methods and types

Standard Backup: This method can be used to perform Full or Level 0 backups of the selected volumes. The Standard Backup method is the only method available with Data ONTAP versions older than 8.1.1 and Plug‑in for SnapMirror to Tape versions older than 7.6.x.
Block Level Incremental (BLI) Backup: This method can be used to perform Full, Incremental, and Differential Backups of the selected volumes. The BLI Backup method uses snapshots to perform backups. A Full Backup initializes a backup context against which the plug-in performs Incremental and Differential Backups of the selected volumes.
Full Backup: A Full Backup provides a backup of the entire volume. These backups serve as the base backups for subsequent Incremental and Differential Backups.
Incremental Backup: An Incremental Backup provides a backup of the changes in a volume since the last Full, Differential, or Incremental Backup. Incremental Backups consume minimum storage space and are quicker to perform. However, data recovery can take more time depending on the number of savesets that the plug-in is required to restore.
Differential Backup: A Differential Backup provides a backup of the changes in a volume since the last Full Backup. Differential Backups speed up recovery since the plug-in is required to restore only two savesets. However, these backups consume more storage space and take more time to complete than the Incremental Backups. Differential Backups duplicate the data backed up by previous backups of the same type.
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