IBM SG24-5131-00 manual Physical Volume Names

Creating a Concurrent Access Volume Group on Serial Disk Subsystems

To use a concurrent access volume group, defined on a serial disk subsystem such as an IBM 7133 disk subsystem, you must create it as a concurrent-capablevolume group. A concurrent-capable volume group can be activated (varied on) in either non-concurrent mode or concurrent access mode. To define logical volumes on a concurrent-capable volume group, it must be varied on in non-concurrent mode.

You can use smit mkvg with the following options to build the volume group:

Table 14. smit mkvg Options (Concurrent, Non-RAID)

Options				Description
VOLUME GROUP name				Specify name of volume group.
Physical	partition	SIZE in		Accept the default.
megabytes
PHYSICAL VOLUME NAMES				Specify the names of the physical volumes you want
				included in the volume group.
Activate	volume		group	Set this field to no so that the volume group can be
AUTOMATICALLY		at	system	activated as appropriate by the cluster event scripts.
restart?
ACTIVATE volume group after it				Set this field to no.
is created?
Volume	Group		MAJOR	Accept the default.
NUMBER
Create VG concurrent capable?				Set this field to yes so that the volume group can be
				activated in concurrent access mode by the HACMP
				for AIX event scripts.
Auto-varyon concurrent mode?				Set this field to no so that the volume group can be
				activated as appropriate by the cluster event scripts.

Creating a Concurrent Access Volume Group on RAID Disk Subsystems

To create a concurrent access volume group on a RAID disk subsystem, such as an IBM 7135 disk subsystem, follow the same procedure as you would to create a non-concurrent access volume group. A concurrent access volume group can be activated (varied on) in either non-concurrent mode or concurrent access mode. To define logical volumes on a concurrent access volume group, it must be varied on in non-concurrent mode.

Cluster Hardware and Software Preparation 83