Managing Serviceguard Seventeenth Edition, First Reprint December 2009
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
6. Verify that the mirrors were properly created.
lvlnboot -v
The output of this command is shown in a display like the following:
Boot Definitions for Volume Group /dev/vg00:
Physical Volumes belonging in Root Volume Group:
/dev/dsk/c4t5d0 (10/0.5.0) -- Boot Disk
/dev/dsk/c4t6d0 (10/0.6.0) -- Boot Disk
Boot: lvol1 on: /dev/dsk/c4t5d0
/dev/dsk/c4t6d0
Root: lvol3 on: /dev/dsk/c4t5d0
/dev/dsk/c4t6d0
Swap: lvol2 on: /dev/dsk/c4t5d0
/dev/dsk/c4t6d0
Dump: lvol2 on: /dev/dsk/c4t6d0, 0
Choosing Cluster Lock Disks
The following guidelines apply if you are using a lock disk. See “Cluster Lock ”
(page 62) and “Cluster Lock Planning” (page 129) for discussion of cluster lock options.
The cluster lock disk is configured on an LVM volume group that is physically connected
to all cluster nodes. This volume group may also contain data that is used by packages.
When you are using dual cluster lock disks, it is required that the default I/O timeout
values are used for the cluster lock physical volumes. Changing the I/O timeout values
for the cluster lock physical volumes can prevent the nodes in the cluster from detecting
a failed lock disk within the allotted time period which can prevent cluster re-formations
from succeeding. To view the existing IO timeout value, run the following command:
pvdisplay <lock device file name>
The I/O Timeout value should be displayed as “default.” To set the IO Timeout back
to the default value, run the command:
pvchange -t 0 <lock device file name>
The use of a dual cluster lock is only allowed with certain specific configurations of
hardware. Refer to the discussion in Chapter 3 on “Dual Cluster Lock.” For instructions
on setting up a lock disk, see “Specifying a Lock Disk” (page 222).
Preparing Your Systems 205