CAUTION - this is not a recommended path as the SAN/iQ 9.0 software is designed with the intelligence to painlessly automatically upgrade an entire SAN/iQ 9.0 SAN Management Group. If you use this to upgrade your NSMs one at a time, remember the order of FOM (Fail Over Manager), non-manager, manager not holding the VIP (Virtual IP,) and finally VIP holder, also remote management group first, and be sure to check the official HP documentation.
Procedure
1: On the workstation/server where the HP P4000 Centralized Management Console (CMC) is installed, make sure the CMC is closed and open up the CMC's preferences.txt file
On pre Windows Vista/Server 2008 Systems, the location is something like:
C:\Documents and Settings\{username}\.storage_system
On Windows Vista/Server 2008 and above, it is:
C:\Users\{username}\.storage_system
2: Edit the preferences.txt file with this line at the bottom
CmcUpgradePreference.useOldUpgrades=true
and save the file but do not close it
3: Open up the CMC and log in, and under the configuration summary there will be a tab called “Support Upgrades”, from here the NSMs can be patched one at a time!
Default location of upgrade files downloaded via the upgrade tab is:
C:\Program Files (x86)\HP\P4000\UI\downloads
- or (32-bit Windows systems) -
C:\Program Files\HP\P4000\UI\downloads
Scenarios as to why this might be used
1: Personal preference (not really a good reason since the software has been designed by clever people and in them one must trust)
2: A Management Group has two or more clusters in, and control is required over which cluster is done first
3: There is no hot replica (DR) site or off SAN disk based backups, so in the event of having to undergo a thorough change request procedure which demands a minimal downtime in the extremely unlikely event of SAN failure, it is desired to do the upgrade one node at a time (since a SAN/iQ cluster can happily survive without a whole NSM until it is recovered for network RAID resilient volumes)
A recommendation before doing the upgrade
Keep a note of all Feature Keys and License Keys before the upgrade process, in the event they are required to rebuild an NSM.
Credits: The procedure was provided by an HP Storage guru based in North America (not sure I am at liberty to provide names here :-) )
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