Legato Networker ClientPak and Storage Node User's Guide

Chapter 3: Recovering Files

This chapter describes how to:

• Recover entire directories, individual files, groups of files, or MPE volume sets

• Browse the NetWorker save sets for available recovery files and view the backup

history of files

• Recover files with earlier backup dates

• Recover and relocate a file into a different client directory

The NetWorker NSRRECOV Program

The NetWorker NSRRECOV program replaces lost or damaged files from a copy

stored on a NetWorker backup volume. When NetWorker backs up files to media, it

creates an entry for the files in an online file index. NetWorker uses this index to map

the backed-up files to backup volumes.

Recovery operations are the highest priority operations in NetWorker. For example, if

an autochanger inventory occurs at the same time that a client starts a recovery, and a

tape affected by the inventory is needed for recovery, the inventory is suspended until

the recovery is completed.

When you back up files, NetWorker saves the files as a save set that you can browse if you

need to recover a file, a directory, or a volume set. Each time you back up files, NetWorker

saves a new backup version of the files. If more than one version of backed-up files exists,

by default NetWorker recovers the files with the most recent backup dates.

When you start the NSRRECOV program from a directory that has been backed up,

NetWorker searches the saved file index for the save set that corresponds with the current

client directory.

Types of Recoveries

You can perform two types of recoveries:

• Interactive-browse recoveries

• Non-interactive recoveries

With interactive recoveries, you browse the save sets and mark specific files that you

want to recover. With non-interactive recoveries, you do not browse the save sets or

mark specific files; you enter the NSRRECOV command, the command parameters,

and the file path of the files that you want to recover.

You can perform both non-interactive and interactive recoveries during a Command

Interpreter (CI) session or from a POSIX prompt. You can also set system variables for

both interactive and non-interactive recoveries.