Managing Serviceguard 14th Edition, June 2007

Building an HA Cluster Configuration
Preparing Your Systems
Chapter 5212
NOTE Under agile addressing, the physical devices in these examples would
have names such as /dev/[r]disk/disk1
, and /dev/[r]disk/disk2.
See “About Device File Names (Device Special Files)” on page 111.
1. Create a bootable LVM disk to be used for the mirror.
pvcreate -B /dev/rdsk/c4t6d0
2. Add this disk to the current root volume group.
vgextend /dev/vg00 /dev/dsk/c4t6d0
3. Make the new disk a boot disk.
mkboot -l /dev/rdsk/c4t6d0
4. Mirror the boot, primary swap, and root logical volumes to the new
bootable disk. Ensure that all devices in vg00, such as /usr, /swap,
etc., are mirrored.
NOTE The boot, root, and swap logical volumes must be done in exactly the
following order to ensure that the boot volume occupies the first
contiguous set of extents on the new disk, followed by the swap and
the root.
The following is an example of mirroring the boot logical volume:
lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c4t6d0
The following is an example of mirroring the primary swap logical
volume:
lvextend -m 1 /dev/vg00/lvol2 /dev/dsk/c4t6d0
The following is an example of mirroring the root logical volume:
lvextend -m 1 /dev/vg00/lvol3 /dev/dsk/c4t6d0
5. Update the boot information contained in the BDRA for the mirror
copies of boot, root and primary swap.
/usr/sbin/lvlnboot -b /dev/vg00/lvol1
/usr/sbin/lvlnboot -s /dev/vg00/lvol2
/usr/sbin/lvlnboot -r /dev/vg00/lvol3