Using Serviceguard Extension for RAC, 10th Edition, April 2013

Figure 13 1-1 mapping between SLVM logical and physical volumes for ASM configuration
The SLVM volume groups are marked as shared volume groups and exported across the SGeRAC
cluster using standard SGeRAC procedures.
Please note that, for the case in which the SLVM PVs being used by ASM are disk array LUs, the
requirements in this section do not place any constraints on the configuration of the LUs. The LUs
may be configured with striping, mirroring, and other characteristics at the array level, following
guidelines provided by Oracle and the array provider for use by ASM.
Sample Command Sequence for Configuring SLVM Volume Groups
In this section, we provide an example of a command sequence that can be used to prepare SLVM
Logical Volumes for use by ASM. The example below demonstrates how volume group is created
using new DSF format. HP-UX will automatically use the redundant path for the volume group in
the background.
The scenario for our example is that we are preparing a new volume group named vgora_asm.
The physical path for the first PV is /dev/rdisk/disk1 and the second PV is /dev/rdisk/
disk2.
1. Create the volume group with the two PVs (choosing hh to be the next hexadecimal number
that is available on the system, after the volume groups that are already configured):
# pvcreate -f /dev/rdisk/disk1
# pvcreate -f /dev/rdisk/disk2
# mkdir /dev/vgora_asm
# mknod /dev/vgora_asm/group c 64 0xhh0000
# vgcreate /dev/vgora_asm /dev/disk/disk1
# vgextend /dev/vgora_asm /dev/disk/disk2
2. For each of the two PVs, create a corresponding LV
• Create an LV of zero length
• Mark the LV as contiguous
98 Support of Oracle RAC ASM with SGeRAC