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Disk not seen on all paths

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Category:
ontap-9
Specialty:
hw
Last Updated:

Applies to

ONTAP 9

Issue

  • A disk is not seen on all paths
  • Checking storage disk show -disk name we see only 2 paths instead of 4 paths:

    Cluster::> storage disk show -disk x.x.xx
    Paths:
                                    LUN  Initiator Side        Target Side                                Link
    Controller         Initiator     ID  Switch Port           Switch Port           Acc Use Target Port              TPGN    Speed      I/O KB/s          IOPS
    ------------------ ---------  -----  -------------------- --------------------  --- ---  -----------------------  ------  -------  ------------  ------------
    Node-01                 3d           0          N/A                   N/A                   AO  INU  XXXXXXXXXXXXXXXX      16      12 Gb/S        0                 0
    Node-02                 3a         0         N/A                   N/A                   AO  INU  XXXXXXXXXXXXXXXX      16      12 Gb/S        0              0
                                                                                   
    Errors:
    -

  • Also the system is reporting mixed path instead of multipath in the output sysconfig -a:

    System Storage Configuration: Mixed-Path HA
     
  • Disk is only seen on one path for each node in sysconfig -a

slot 3: SAS Host Adapter 3a
02.21: NETAPP   X377_SCBPE10TA07 NA01 9324.2GB 520B/sect (xxxxxxxx)
02.23: NETAPP   X377_SCBPE10TA07 NA01 9324.2GB 520B/sect (xxxxxxxx)

slot 3: SAS Host Adapter 3d
02.21: NETAPP   X377_SCBPE10TA07 NA01 9324.2GB 520B/sect (xxxxxxxx)
02.22: NETAPP   X377_SCBPE10TA07 NA01 9324.2GB 520B/sect (xxxxxxxx)
02.23: NETAPP   X377_SCBPE10TA07 NA01 9324.2GB 520B/sect (xxxxxxxx)

  • Reseat of the affected disk does not resolve
  • Reseat of the cables attached to the shelf one by one does not resolve

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