Using Serviceguard Extension for RAC Version A.11.20 - (August 2011)

Creating Volumes
Use the vxassist command to create logical volumes. The following is an example:
# vxassist -g ops_dg make log_files 1024m
This command creates a 1024MB volume named log_files in a disk group named ops_dg.
The volume can be referenced with the block device file /dev/vx/dsk/ops_dg/log_files
or the raw (character) device file /dev/vx/rdsk/ops_dg/log_files.
Verify the configuration with the following command:
# vxdg list
IMPORTANT: After creating these files, use the vxedit command to change the ownership of
the raw volume files to oracle and the group membership to dba, and to change the permissions
to 660. Example:
# cd /dev/vx/rdsk/ops_dg
# vxedit -g ops_dg set user=oracle *
# vxedit -g ops_dg set group=dba *
# vxedit -g ops_dg set mode=660 *
The logical volumes are now available on the primary node, and the raw logical volume names
can now be used by the Oracle DBA.
Mirror Detachment Policies with CVM
The required CVM disk mirror detachment policy is “global”—as soon as one node cannot see a
specific mirror copy (plex), all nodes cannot see it as well. The alternate policy is “local”—if one
node cannot see a specific mirror copy, then CVM will deactivate access to the volume for that
node only.
This policy can be re-set on a disk group basis by using the vxedit command, as follows:
# vxedit set diskdetpolicy=global <DiskGroupName>
NOTE: The specific commands for creating mirrored and multipath storage using CVM are
described in the HP-UX documentation for the Veritas Volume Manager.
Oracle Demo Database Files
The following set of volumes is required for the Oracle demo database which you can create during
the installation process.
Table 2 Required Oracle File Names for Demo Database
Oracle File Size
(MB)
Raw Device File NameSize (MB)Volume Name
110/dev/vx/rdsk/ops_dg/opsctl1.ctl118opsctl1.ctl
110/dev/vx/rdsk/ops_dg/opsctl2.ctl118opsctl2.ctl
110/dev/vx/rdsk/ops_dg/opsctl3.ctl118opsctl3.ctl
120/dev/vx/rdsk/ops_dg/ops1log1.log128ops1log1.log
120/dev/vx/rdsk/ops_dg/ops1log2.log128ops1log2.log
120/dev/vx/rdsk/ops_dg/ops1log3.log128ops1log3.log
120/dev/vx/rdsk/ops_dg/ops2log1.log128ops2log1.log
120/dev/vx/rdsk/ops_dg/ops2log2.log128ops2log2.log
Creating Volumes 57