Serviceguard Extension for RAC Version A.11.19 Release Notes (May 2010)

You can obtain the DRD software free from software.hp.com—search for DynRootDisk. For
more information, go http://www.hp.com/go/hpux-core-docs —> HP-UX 11i v3. (You
can also reach the information library from www.hp.com/go/drd, or go to www.hp.com and search
for Dynamic Root Disk Information Library).
IMPORTANT:
Use the clone disk only on the system on which it was created. At present, Serviceguard does not
support booting from a clone disk made on another system (sometimes referred to as DRD re-hosting).
Rolling Upgrade Using DRD
A rolling upgrade using DRD is like a rolling upgrade, but is even less disruptive because each node
is down for a shorter time. It is also very safe—if something goes wrong, you can roll back to the
original (pre-upgrade) state by rebooting from the original disk.
This method is the least disruptive, but you need to make sure your cluster is eligible, see “Restrictions
for DRD Upgrades” on page 12.
If, after reading and understanding the restrictions, you decide to perform a rolling upgrade using
DRD, follow the instructions under “Performing a Rolling Upgrade Using DRD” on page 16.
Non-Rolling Upgrade Using DRD
In a non-rolling upgrade with DRD, you clone each node's root disk and apply the upgrade to the
clone, halt the cluster, and then reboot each node from its updated clone root disk.
This method involves much less cluster down time than a conventional non-rolling upgrade, and is
particularly safe because the nodes can be quickly rolled back to their original (pre-upgrade) root
disks. But you must make sure your cluster is eligible. See “Restrictions for DRD Upgrades” on page 12.
If, after reading and understanding the restrictions, you decide to perform a non-rolling upgrade using
DRD, follow the instructions under “Performing a Non-Rolling Upgrade Using DRD” on page 18.
Restrictions for DRD Upgrades
• Upgrade using DRD is supported only on HP-UX 11i v3.
• As of the date of these release notes, the only paths that are supported for DRD upgrade are the
following:
• from Serviceguard/SGeRAC version A.11.18 with patch PHSS_37602 (or a later cumulative
patch) to A.11.19 or an A.11.19 patch release.
• from Serviceguard/SGeRAC version A.11.19 to an A.11.19 patch release.
IMPORTANT:
Upgrades from earlier releases via DRD are not currently supported.
Upgrades to version A.11.19 require that you make a manual fix to a checkinstall script in
the software depot.
For instructions, see the Workaround Notes for defect QXCR1000906197 at ITRC.hp.com.
for more information about looking up defects, see “Patches and Fixes in this Version” on page 20.
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