Managing Serviceguard Sixteenth Edition, March 2009

NOTE: If you are configuring volume groups that use mass storage on HP’s HA disk
arrays, you should use redundant I/O channels from each node, connecting them to
separate ports on the array. As of HP-UX 11i v3, the I/O subsystem performs load
balancing and multipathing automatically.
Creating a Storage Infrastructure with LVM
This section describes storage configuration with LVM. It includes procedures for the
following:
• Creating Volume Groups for Mirrored Individual Disks
• Distributing Volume Groups to Other Nodes
NOTE: This procedure assumes you are using LVM rather than LVM 2.0. For more
information about LVM 2.0, see the white paper LVM 2.0 Volume Groups in HP-UX 11i
v3, which you can find on docs.hp.com under 11i v3 —> LVM Volume Manager.
The Event Monitoring Service HA Disk Monitor provides the capability to monitor the
health of LVM disks. If you intend to use this monitor for your mirrored disks, you
should configure them in physical volume groups. For more information, refer to the
manual Using High Availability Monitors (http://docs.hp.com -> High
Availability -> Event Monitoring Service and HA Monitors ->
Installation and User’s Guide).
Creating Volume Groups for Mirrored Individual Data Disks
The procedure described in this section uses physical volume groups for mirroring of
individual disks to ensure that each logical volume is mirrored to a disk on a different
I/O bus. This kind of arrangement is known as PVG-strict mirroring. It is assumed
that your disk hardware is already configured in such a way that a disk to be used as
a mirror copy is connected to each node on a different bus from the bus that is used
for the other (primary) copy.
For more information on using LVM, refer to the Logical Volume Management volume
of the HP-UX System Administrator’s Guide.
You can use the System Management Homepage to create or extend volume groups
and create logical volumes. From the System Management Homepage, choose Disks
and File Systems. Make sure you create mirrored logical volumes with PVG-strict
allocation.
When you have created the logical volumes and created or extended the volume groups,
specify the filesystem that is to be mounted on the volume group, then skip ahead to
the section “Deactivating the Volume Group”.
To configure the volume groups from the command line, proceed as follows.
Preparing Your Systems 207