Using High Availability Monitors (June 2007)

Monitoring Disk Resources
Rules for Using the HA Disk Monitor with ServiceGuard
Chapter 2 41
PVG busB
/dev/dsk/c2t1d0
/dev/dsk/c2t3d0
VG /dev/vgsing
PVG busA
/dev/dsk/c1t0d1
/dev/dsk/c1t2d1
PVG busB
/dev/dsk/c2t1d1
/dev/dsk/c2t3d1
3. Carefully copy the /etc/lvmpvg to each system connected to the disk
array.
NOTE Make sure you edit lvmpvg to contain the correct link names in
/dev/dsk/device for that system.
Creating Volume Groups on Disk Arrays Using PV Links
If you will be monitoring volume groups that use mass storage on disk
arrays, you should use redundant I/O channels from each node, and
connect them to separate controllers on the array. Then you can define
alternate links to the LUNs or logical disks you have defined on the
array. Alternate links (known as PV links) to the same disk should be
assigned to different physical volume groups. In HP SMH, using the
Disks and File Systems (fsweb) application choose the type of disk array
you want to configure, and follow the menus to define alternate links. Be
sure to specify a different physical volume group for each link to the
same disk.
The following example shows how to configure alternate links using LVM
commands. In the example, the following disk configuration is assumed:
8/0.15.0 /dev/dsk/c0t15d0 /* I/O Channel 0 (8/0) SCSI address 15 LUN 0 */
8/0.15.1 /dev/dsk/c0t15d1 /* I/O Channel 0 (8/0) SCSI address 15 LUN 1 */
8/0.15.2 /dev/dsk/c0t15d2 /* I/O Channel 0 (8/0) SCSI address 15 LUN 2 */
8/0.15.3 /dev/dsk/c0t15d3 /* I/O Channel 0 (8/0) SCSI address 15 LUN 3 */
8/0.15.4 /dev/dsk/c0t15d4 /* I/O Channel 0 (8/0) SCSI address 15 LUN 4 */
8/0.15.5 /dev/dsk/c0t15d5 /* I/O Channel 0 (8/0) SCSI address 15 LUN 5 */
10/0.3.0 /dev/dsk/c1t3d0 /* I/O Channel 1 (10/0) SCSI address 3 LUN 0 */