HP Veritas Volume Manager 5.0 -UX 11i v3 manual Disk group join operation

198Creating and administering disk groups

Reorganizing the contents of disk groups

Figure 4-6 Disk group join operation

Source disk group

join

Target disk group

After	Target disk group
join

These operations are performed on VxVM objects such as disks or top-level volumes, and include all component objects such as sub-volumes, plexes and subdisks. The objects to be moved must be self-contained, meaning that the disks that are moved must not contain any other objects that are not intended for the move.

If you specify one or more disks to be moved, all VxVM objects on the disks are moved. You can use the -o expand option to ensure that vxdg moves all disks on which the specified objects are configured. Care should be taken when doing this as the result may not always be what you expect. You can use the listmove operation with vxdg to help you establish what is the self-contained set of objects that corresponds to a specified set of objects.

Caution: Before moving volumes between disk groups, stop all applications that are accessing the volumes, and unmount all file systems that are configured on these volumes.

If the system crashes or a hardware subsystem fails, VxVM attempts to complete or reverse an incomplete disk group reconfiguration when the system is restarted or the hardware subsystem is repaired, depending on how far the reconfiguration had progressed. If one of the disk groups is no longer available because it has been imported by another host or because it no longer exists, you