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DISK REDUNDANCY FAILED detected due to wrong sas cabling

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Category:
ontap-9
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HW
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Applies to

  • ONTAP 9
  • FAS2750

Issue

  • system trigger ASUP for (DISK REDUNDANCY FAILED) ERROR.

HA Group Notification (DISK REDUNDANCY FAILED) ERROR

  • SYSCONFIG -A show storage configuration as mixed-path.

System Storage Configuration: Mixed-Path HA

  • Internal Shelf 0 and External Shelf 1 installed but SYSCONFIG -A only show Shelf 1 for 0a port.

slot 0: SAS Host Adapter 0a (PMC-Sierra PM8070 rev. C, SAS, <UP>)

Shelf 1: DS224-12  Firmware rev. IOM12B A: 0141  IOM12B B: 0141

  • 0b port show both Internal Shelf 0 and External Shelf 1.

slot 0: SAS Host Adapter 0b (PMC-Sierra PM8070 rev. C, SAS, <UP>)

Shelf 0: DS224-12  Firmware rev. IOM12E A: 0250  IOM12E B: 0250
Shelf 1: DS224-12  Firmware rev. IOM12B A: 0141  IOM12B B: 0141

  • SAS-EXPANDER-MAP show three expander for 0b port.

Expanders on channel 0a:
Level 1: WWN 500a09800870a3f5, ID 1, Serial Number ' XXXXXXXXXXXXXXX', Product 'DS22412IOM12 ', Rev '0141', Slot A

Expanders on channel 0b:
Level 1: WWN 500a09800f43c3bf, ID 0, Serial Number ' XXXXXXXXXXXXXXX', Product 'DS22412IOM12E ', Rev '0250', Slot B
Level 2: WWN 500a09800870a565, ID 1, Serial Number ' XXXXXXXXXXXXXXX', Product 'DS22412IOM12 ', Rev '0141', Slot B
Level 3: WWN 500a09800f41d5bf, ID 0, Serial Number ' XXXXXXXXXXXXXXX', Product 'DS22412IOM12E ', Rev '0250', Slot A

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