Using Serviceguard Extension for RAC, 3rd Edition, May 2006

Serviceguard Configuration for Oracle 9i RAC
Creating a Storage Infrastructure with LVM
Chapter 3 117
the array. If you are using SAM, choose the type of disk array you wish to
configure, and follow the menus to define alternate links. If you are using
LVM commands, specify the links on the command line.
The following example shows how to configure alternate links using
LVM commands. 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 */
10/0.3.1 /dev/dsk/c1t3d1 /* I/O Channel 1 (10/0) SCSI address 3 LUN 1 */
10/0.3.2 /dev/dsk/c1t3d2 /* I/O Channel 1 (10/0) SCSI address 3 LUN 2 */
10/0.3.3 /dev/dsk/c1t3d3 /* I/O Channel 1 (10/0) SCSI address 3 LUN 3 */
10/0.3.4 /dev/dsk/c1t3d4 /* I/O Channel 1 (10/0) SCSI address 3 LUN 4 */
10/0.3.5 /dev/dsk/c1t3d5 /* I/O Channel 1 (10/0) SCSI address 3 LUN 5 */
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:
/dev/dsk/c0t15d0
/dev/dsk/c1t3d0
Use the following procedure to configure a volume group for this logical
disk:
1. First, set up the group directory for vg_ops:
# mkdir /dev/vg_ops
2. Next, create a control file named group in the directory
/dev/vg_ops, as follows:
# mknod /dev/vg_ops/group c 64 0xhh0000
The major number is always 64, and the hexadecimal minor number
has the format:
0xhh0000
where hh must be unique to the volume group you are creating. Use
the next hexadecimal number that is available on your system, after
the volume groups that are already configured. Use the following
command to display a list of existing volume groups: