I have the doc you are saying, it is the one I am using http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c03290635/c03290635.pdf in page 32 you can see what you need to use for path failover policy and pther storage features in multipath.conf, it is multibus because 3PAR says so, other storage arrays have other configurations; # HP EVA device { vendor "HP|COMPAQ" product "HSV1[01]1 \(C\)COMPAQ|HSV[2][01]0|HSV300|HSV4[05]0" path_grouping_policy group_by_prio getuid_callout "/lib/udev/scsi_id -g -u /dev/%n" path_checker tur path_selector "round-robin 0" prio alua rr_weight uniform failback immediate hardware_handler "0" no_path_retry 18 rr_min_io 100 } # Device attributed for EMC CLARiiON and VNX series ALUA device { vendor "DGC" product "*" prio_callout "/sbin/mpath_prio_alua /dev/%n" path_grouping_policy group_by_prio features "1 queue_if_no_path" failback immediate hardware_handler "1 alua" } } I would not change anything there because this configuration is provided by the storage maker If you read 3PAR doc, page 70, you can see what I have said in other mail: *NOTE: Do not use the fdisk command with /dev/mapper/XXX devices to create partitions* But that is not true, other makers says we must run fdisk to /dev/mapper/XXX devices, MOS notes as well -- //www.freelists.org/webpage/oracle-l