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Notes on Offhost Backup and Frozen Images

54 NetBackup ServerFree Agent System Administrator’s Guide

◆ The Cross mount points class attribute is not available for classes that are

configured for frozen images. This means that NetBackup will not cross file

system boundaries during a backup of a frozen image. A backup of a high-level

file system, such as / (root), will not back up files residing in lower-level file

systems unless those file systems are also specified as separate entries in the file

list. To back up /usr and /var, for instance, both /usr and /var must be

included as separate entries in the file list.

For more information on Cross mount points, refer to the NetBackup DataCenter

System Administrator’s Guide - UNIX.

Frozen Image Method

nbu_snap

The nbu_snap frozen image method is for making copy-on-write snapshot frozen

images (for ufs or VERITAS VxFS file systems).

fsclone

The fsclone frozen image method is for making copy-on-write snapshot frozen

images. VERITAS Database Edition for Oracle 2.2, with VERITAS File System (VxFS)

3.4, must be installed on NetBackup clients. VERITAS recommends that the fsclone

frozen image method only be used with Oracle databases.

◆ The fsclone frozen image method is not supported for backing up raw partitions

(whether FlashBackup or Standard classes).

◆ Make sure there is enough disk space available for the clone. The file system

containing the frozen image source must have at least 5% free space in order to

successfully implement the clone.

vxvm

The vxvm frozen image method is for making mirror frozen images with VERITAS

Volume Manager 3.1 snapshot mirrors.

The vxvm frozen image method works for any file system mounted on a VxVM

volume. However, before the backup is performed, the frozen image source must be

configured with a VxVM 3.1 snapshot mirror (otherwise, the backup will fail). For

help configuring a snapshot mirror, refer to “Creating a Snapshot Mirror of the vxvm

Frozen Image Source” on page 55, or to the VERITAS Volume Manager 3.1

Administrator’s Reference Guide.

Note Since VxVM 3.1 does not support fast mirror resynchronization on RAID-5

volumes, the vxvm frozen image method must not be used with VxVM volumes

configured as RAID-5. If the vxvm frozen image method is selected for a RAID-5

volume, the backup will fail.

NetBackup 4.0V ServerFree Agent System Administrator's Guide for Solaris

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Seagate ST39175LW Betriebsanweisung Seite 64