Snapshot backup

A snapshot is a disk image of the client's data that is made almost instantaneously. NetBackup backs up the data from the snapshot image, not directly from the client's primary data.

Instant Recovery (Persistent Frozen Image or PFI)

An instant recovery backup is similar to a snapshot backup except that the snapshot is not transferred to tape. The restore may be made directly from snapshot copy.

Persistent Frozen Image with Backup to Tape

This feature is similar to the Instant recovery feature except that a backup copy is made to a tape storage unit. If the image is needed for a restore, then a disk copy is used unless it has been swapped out due to storage contention. In this case, the restore falls back to the tape copy of the backup.

Off-host alternate client backup

An off-host alternate client backup shifts the burden of backup processing to an alternate client. This action reduces the effect on the client's resources ordinarily caused by a local backup. The backup agent reads the data from the SharedDisk and writes it to storage.