The more i stuck in Solaris the more i like my Linux :-|
I was continuously in hot waters when unable to delete that fucking test multi-owner disk set from Oracle RAC, almost tried all i could but it was not doing...i left office yesterday almost 30 minute late n was really angry with me about delaying the RAC installation due to this multi-owner disk issue...
Today when i came office, i just started reading the metaset command manual & found -P & -W option/switch that can do it if you use them in sequence.
#metaset -s multi-owner-setname -w
this will release/withdraw host from this set.
#metaset -s multi-owner-setname -P
this will purge the disk set.
PS: these commands should be in same sequence i.e. first withdraw then purge & you should be running them as superuser/root