Managing Serviceguard 11th Edition, Version A.11.16, Second Printing June 2004

Building an HA Cluster Configuration
Creating a Storage Infrastructure with LVM
Chapter 5 203
Creating Volume Groups for Disk Arrays Using PV
Links
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. Then you can define
alternate links (also called PV links) to the LUNs or logical disks you
have defined on the array. In SAM, choose the type of disk array you
wish to configure, and follow the menus to define alternate links.
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 addres
s3LUN0*/
10/0.3.1 /dev/dsk/c1t3d1 /* I/O Channel 1 (10/0) SCSI addres
s3LUN1*/
10/0.3.2 /dev/dsk/c1t3d2 /* I/O Channel 1 (10/0) SCSI addres
s3LUN2*/
10/0.3.3 /dev/dsk/c1t3d3 /* I/O Channel 1 (10/0) SCSI addres
s3LUN3*/
10/0.3.4 /dev/dsk/c1t3d4 /* I/O Channel 1 (10/0) SCSI addres
s3LUN4*/
10/0.3.5 /dev/dsk/c1t3d5 /* I/O Channel 1 (10/0) SCSI addres
s3LUN5*/
Assume that the disk array has been configured, and that both the
following device files appear for the same LUN (logical disk) when you
run the ioscan command: