Use DCU during installation to check and fix any conflicts.
Can make use of the interactive boot session by hitting space at the red boot screen. Then you can go back to the old resmgr by typing :-
RESMGR=resmgr.sav
In the same way you can go back to the previous kernel by :-
KERNEL=unix.old
(the resmgr.sav represents the last successful boot of your system)
Also, make sure that HBA kernel modules are statically linked into the kernel.
Do check out the documentation and system owner books.
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