If you have two SANS paths zones on your sans fabric zones you will see the 
same device show twice in your format command so you run:
stmsboot -e

Example 2 Disabling Solaris I/O Multipathing use stmsboot -d

Also the format will show only one deice path showing if enabled.

 and so depending how you have /kernek/drv/scsi_vhci.conf set 
# Load balancing global configuration: setting load-balance="none" will cause
# all I/O to a given device (which supports multipath I/O) to occur via one
# path.  Setting load-balance="round-robin" will cause each path to the device
# to be used in turn.
#
load-balance="round-robin";
#
# Automatic failback configuration
# possible values are auto-failback="enable" or auto-failback="disable"
auto-failback="enable";

this will allow for load balancing or fail over path have a backup path for 
your SANS connection
luxadm probe

luxadm display /dev/rdsk/cxtx000000xxxxxxxxxxxs2
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