HP Serviceguard Version A.11.19 Release Notes, October 2009

Using DRD” in Appendix D of the latest edition of Managing Serviceguard, which you
can find at the address given under “Documents for This Version ” (page 50).
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, then halt the cluster and 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” (page 64).
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” in Appendix D of the latest edition of Managing Serviceguard, which you
can find at the address given under “Documents for This Version ” (page 50).
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:
— from Serviceguard 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 version A.11.19 to an A.11.19 patch release.
64 Serviceguard Version A.11.19 Release Notes