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Description of problem:
There is no /var/lib/multipath/bindings file in rhel6 . It have been changed to /etc/multipath/bindings
The below in the doc at page 139
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When the user_friendly_names feature (of device-mapper-multipath) is used, the WWID is mapped to a name of the form /dev/mapper/mpathn. By default, this mapping is maintained in the file /var/lib/multipath/bindings. These mpathn names are persistent as long as that file is maintained.
Warning
The multipath bindings file (by default, /var/lib/multipath/bindings) must be available at boot time. If /var is a separate file system from /, then you must change the default location of the file. For more information, refer to http://kbase.redhat.com/faq/docs/DOC-17650.
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should be changed to below
When the user_friendly_names feature (of device-mapper-multipath) is used, the WWID is mapped to a name of the form /dev/mapper/mpathn. By default, this mapping is maintained in the file /etc/multipath/bindings. These mpathn names are persistent as long as that file is maintained.
Additional info:
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/persistent_naming.html#persistent_naming-wwid