Issue

• Failback with DM-Multipath is not working

mpatha (36003xxxxxxxa102a67a150342a52b9f) dm-0 DataCore,Virtual Disk
size=500G features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=1 status=active
| `- 1:0:0:0 sda 8:0  active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
  `- 2:0:0:0 sdb 8:16 active ready running
Feb 27 16:26:44 | wwid 36003xxxxxxxa102a67a150342a52b9f already in wwids file

During the operation, if HBA port1 goes down, multipath switches the path through HBA2. When HBA1 comes online, multipath does not switch over to path through HBA1. This is observed only in RHEL6, with same configuration, failback was happenning correctly in RHEL5.