Veritas Storage Foundation™ 5.0.1 for Oracle RAC Installation, Configuration, and Administrator's Guide Extracts for the HP Serviceguard Storage Management Suite on HP-UX 11i v3

# vxdg -g shared_disk_group set activation=sw
• On the slave nodes, enter:
# vxdg -g shared_disk_group set activation=sw
Refer to the description of disk group activation modes in the Veritas Volume Manager
Administrator's Guide for more information.
Deporting and Importing Shared Disk Groups
Shared disk groups in an SGeRAC environment are configured for “Autoimport” at the time of
CVM startup. If the user manually deports the shared disk group on the CVM master, the disk
group is deported on all nodes. To reimport the disk group, the user must import the disk group
as a shared group from the CVM master.
• To deport a shared disk group, use the following command on the CVM master:
# vxdg deport shared_disk_group
• To import a shared disk group, use the following command on the CVM master:
# vxdg -s import shared_disk_group
• To import a disk group as a standalone disk group, deport it from the CVM master and use
the following command on any node:
# vxdg -C import shared_disk_group
• To reimport a disk group as a shared disk group, deport it from the standalone node and
use the following command on the CVM master node:
# vxdg -C -s import shared_disk_group
Reviewing Limitations of Shared Disk Groups
The cluster functionality of VxVM (CVM) does not support RAID-5 volumes or task monitoring
for shared disk groups in a cluster. These features can function in private disk groups attached
to specific nodes of a cluster. Online relayout is available provided it does not involve RAID-5
volumes.
The boot disk group (usually aliased as bootdg) is a private group that cannot be shared in a
cluster.
CVM only provides access to raw device; it does not support shared access to file systems in
shared volumes unless you install and configure the appropriate software, such as Veritas Cluster
File System (CFS). If a shared disk group contains unsupported objects, deport the group and
reimport it as a private group on any node. Reorganize the volumes into layouts supported for
shared disk groups, and then deport and reimport the group as a shared one.
About Raw Volumes Versus CFS for Data Files
Keep these points in mind about raw volumes and CFS for data files:
• If you use file-system-based data files, the file systems containing these files must be located
on shared disks. Create the same file system mount point on each node.
• If you use raw devices, such as VxVM volumes, set the permissions for the volumes to be
owned permanently by the database account.
For example, type:
# vxedit -g dgname set group=oracle owner=oracle mode 660 \
/dev/vx/rdsk/dgname/volume_name
VxVM sets volume permissions on import. The VxVM volume, and any file system that is
created in it, must be owned by the Oracle database account.
26 Planning SGeRAC Installation and Configuration