multipath -ll shows only 1 path for certain LUNs

Solution Verified - Updated -

Issue

  • For some luns multipath -ll shows only one path instead of two.

For example:-

netapp_aggr0_wgdata3_lun4 (360a98000572d52755734653331767642) dm-62 NETAPP,LUN
[size=1.5T][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=50][active]
\_ 4:0:1:37 sddk 71:32   [active][ready]
  • Whereas another LUN shows two paths

    For example:-

netapp_lun_md1_orig (360a98000572d5275574a2f615770426a) dm-32 NETAPP,LUN
[size=1.1T][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=50][active]
\_ 4:0:0:7  sdi  8:128   [active][ready]
\_ round-robin 0 [prio=10][enabled]
\_ 4:0:1:7  sdcg 69:64   [active][ready]
  • The HBA wwn is in the group and is mapped to all luns in both the controllers.

Environment

  • Red Hat Enterprise Linux 5.5
  • Device-mapper Multipath

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