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Remote disks missing some paths after fabric event

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Category:
fabric-interconnect-and-management-switches
Specialty:
hw
Last Updated:

Applies to

  • Fabric Metrocluster
  • Cisco MDS switches

Issue

  • After a fabric event, some remote disks are missing 4 of the 8 expected paths despite the links being up and functioning:

storage array disk paths show -disk 1.1.1
Disk Name: 1.1.1
UID:
AAAAAAA:BBBBB:00000000:00000000:00000000:00000000:00000000:00000000:00000000:00000000
LUN
Link Disk I/O
Controller Initiator ID Acc Use
Target Port TPGN Speed (KB/s) IOPS
node1 2c 1019 AO INU 2200001086acbb40
1 16 Gb/S 0 0
node1 2a 1019 AO RDY 2100001086acbb40 0
16 Gb/S 0 0
node2 2c 1019 AO RDY 2200001086acbb40 1 16 Gb/S
0 0
node2 2a 1019 AO INU 2100001086acbb40 0 16 Gb/S 124
0

  • Notice the path on 11a and 11c is missing in the above output.
  • The non-affected disks show the correct number of paths:

storage array disk paths show -disk 2.2.1
Disk Name: 2.2.1
UID: CCCCCCC:DDDDDDD:00000000:00000000:00000000:00000000:00000000:00000000:00000000:00000000
LUN Target Side Initiator Side Link Disk I/O
Controller Initiator ID Acc Use Target Port Switch Port Switch Port TPGN Speed (KB/s) IOPS
node1 2c 14 AO RDY 2200001086ab5d80 sw2:1-14 sw2:1-2 30 16 Gb/S 0 0
node1 11c 14 AO RDY 2200001086ab5d40 sw2:1-15 sw2:1-3 26 16 Gb/S 0 0
node1 2a 14 AO RDY 2100001086ab5d80 sw1:1-14 sw1:1-2 29 16 Gb/S 0 0
node1 11a 14 AO INU 2100001086ab5d40 sw1:1-15 sw1:1-3 25 16 Gb/S 0 0
node2 2c 14 AO INU 2200001086ab5d80 sw2:1-14 sw2:1-5 30 16 Gb/S 0 0
node2 11c 14 AO RDY 2200001086ab5d40 sw2:1-15 sw2:1-6 26 16 Gb/S 0 0
node2 2a 14 AO RDY 2100001086ab5d80 sw1:1-14 sw1:1-5 29 16 Gb/S 0 0
node2 11a 14 AO RDY 2100001086ab5d40 sw1:1-15 sw1:1-6 25 16 Gb/S 0 0

 

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