Q . How can I see  the details of multipathing on a RHEL 5 server, using DM-Multipath?  This is normally a prerequisite for a DB2 Installation  using SAN and Linux. The DBA can do a quick check

A. Use the multipath   command variations

#find the paths to LUN
multipath –l
 #Print multipathed paths showing which devices are multipathed
multipath –v2