HP Veritas Volume Manager 5.0 -UX 11i v3 manual Reorganizing the contents of disk groups

196Creating and administering disk groups

Reorganizing the contents of disk groups

■To perform online maintenance and upgrading of fault-tolerant systems that can be split into separate hosts for this purpose, and then rejoined.

■To isolate volumes or disks from a disk group, and process them independently on the same host or on a different host. This allows you to implement off-host processing solutions for the purposes of backup or decision support. This is discussed further in “Configuring off-host processing” on page 369.

You can use either the Veritas Enterprise Administrator (VEA) or the vxdg command to reorganize your disk groups. For more information about using the graphical user interface, see the Veritas Enterprise Administrator User’s Guide and VEA online help. This section describes how to use the vxdg command.

The vxdg command provides the following operations for reorganizing disk groups:

■move—moves a self-contained set of VxVM objects between imported disk groups. This operation fails if it would remove all the disks from the source disk group. Volume states are preserved across the move. The move operation is illustrated in Figure 4-4.

Figure 4-4 Disk group move operation

Source disk group

Target disk group

move

Source disk group	After
	move

Target disk group

■split—removes a self-contained set of VxVM objects from an imported disk group, and moves them to a newly created target disk group. This operation fails if it would remove all the disks from the source disk group, or if an