FC port_state is returned as "Unknown" in sysfs

Solution Unverified - Updated -

Issue

  • One of the two FC adapters used is in Unknown state and the discs visible are reached by a single path, how can I re-activate the second path without rebooting the server.
$ grep -Hv "zz" /sys/class/fc_host/host*/port_state
/sys/class/fc_host/host2/port_state:Unknown
/sys/class/fc_host/host3/port_stat:e:Linkdown
/sys/class/fc_host/host4/port_state:linkdown
/sys/class/fc_host/host5/port_state:online

Environment

  • Red Hat Enterprise Linux 6.x
    • Hardware: BL 460C G8 inserted into a HP C7000 Blade Chassis
      • QLogic FC HBA (qla2xxx)

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