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

Serviceguard Configuration for Oracle 9i RAC
Creating a Storage Infrastructure with LVM
Chapter 3114
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:
# ls -l /dev/*/group
3. Create the volume group and add physical volumes to it with the
following commands:
# vgcreate -g bus0 /dev/vg_ops /dev/dsk/c1t2d0
# vgextend -g bus1 /dev/vg_ops /dev/dsk/c0t2d0
The first command creates the volume group and adds a physical
volume to it in a physical volume group called bus0. The second
command adds the second drive to the volume group, locating it in a
different physical volume group named bus1. The use of physical
volume groups allows the use of PVG-strict mirroring of disks and
PV links.
4. Repeat this procedure for additional volume groups.
Building Mirrored Logical Volumes for RAC with LVM
Commands
After you create volume groups and define physical volumes for use in
them, you define mirrored logical volumes for data, logs, and control
files. It is recommended that you use a shell script to issue the
commands described in the next sections. The commands you use for
creating logical volumes vary slightly depending on whether you are
creating logical volumes for RAC redo log files or for use with Oracle
data.
Creating Mirrored Logical Volumes for RAC Redo Logs and
Control Files
Create logical volumes for use as redo log and control files by selecting
mirror consistency recovery. Use the same options as in the following
example:
# lvcreate -m 1 -M n -c y -s g -n redo1.log -L 28 /dev/vg_ops
The -m 1 option specifies single mirroring; the -M n option ensures that
mirror write cache recovery is set off; the -c y means that mirror
consistency recovery is enabled; the -s g means that mirroring is