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Chapter 6, Core Frozen Image Services 89

Creating a Snapshot Mirror of the vxvm Frozen Image Source

Creating a Snapshot Mirror of the vxvm Frozen Image

Source

To use the vxvm frozen image method, you must create a snapshot mirror of the frozen

image source before making a backup. Before specifying a frozen image source as

described in this chapter, create a snapshot mirror on the client by using one of the

following methods:

◆ In the Volume Manager Storage Administrator interface, select the volume that will be

the frozen image source, right click on it, and select Snapshot from the pop-up menu.

In the Volume Snapshot dialog, select Enable FMR (if available, see note below) and

click the Snapstart button. For details, refer to the Volume Manager Storage

Administrator Administrator’s Guide - Solaris.

Or:

◆ Enter the following commands:

/usr/sbin/vxassist -g disk_group snapstart volume_name

/usr/sbin/vxvol -g disk_group set fmr=on volume_name

where:

- disk_group is the Volume Manager disk group to which the volume (frozen image

source) belongs.

- volume_name is the name of the volume designated at the end of the frozen

image source path (for example, vol1 in /dev/vx/rdsk/dg/vol1).

- fmr=on sets the Fast Mirror Resynchronization attribute, which resynchronizes

the mirror with its primary volume but only copies the blocks that have changed,

rather than performing a full resynchronization. Fast mirror resynchronization

can dramatically reduce the time required to complete the backup.

Fast Mirror Resynchronization (FMR) is a separately available product for

VERITAS Volume Manager.

Designating a frozen image source is described under “Configuring a Frozen Image

Method” in the “NetBackup Configuration” chapter.

Note If an offhost backup method is used, the disks that make up the disk group must

meet the requirements spelled out under “Disk Requirements for Offhost Backup”

on page 122.

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Seagate ST39175LW Anleitung zur Fehlerbehebung Seite 103