Here are some commands related to diagnosing problems with FC disks/LUNs and showing multpath status if using Sun's stmsboot/MPXIO/Multipathing software:
# luxadm display /dev/rdsk/c0t0d0s2
# mpathadm show lu /dev/rdsk/c4t600...dd11d0
# mpathadm list mpath-support
# mpathadm list lu /dev/rdsk/c4t600...dd11d0
# mpathadm show mpath-support libmpscsi-vhci.so
# mpathadm show initiator-port 2101...4f93
# fcinfo hba-port
# fcinfo remote-port -l -s -p 2101...4f93
I found many useful when having to check status of and/or compare the paths.
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