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Due to Voltage Sensor Issue internal shelf status is marked as "unrecoverable"

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Applies to

  • FAS2720
  • ONTAP 9
  • Internal Shelf DS212-12

Issue

  • The internal shelf status is marked as "unrecoverable," by both controllers in the HA  via storage show fault  .

Storage_fault:
Enclosure Status: unrecoverable 
Channel: 0b
Shelf: 0
Shelf Type: DS212-12
Product Serial Number: SHFNCxxxxxxxxxx
Module Type: IOM12E

Voltage Sensors:
Element Status Status Bytes Status Descriptions
1: UNRECOVERABLE 04,00,00,00
2: UNRECOVERABLE 04,00,00,00
3: UNRECOVERABLE 04,00,00,00
4: UNRECOVERABLE 04,00,00,00
 

  • Checking ENVIRONMENT logs we can see that the shelf status in unrecoverable condition & voltage sensors are showing "UNRECOVERABLE" readings

Environment:
Shelf: 0
SES device path: local access: 0b.00.99
Module type: IOM12E; monitoring is active
Shelf status: unrecoverable condition <<<--------------

Voltage Sensor installed element list: 1, 2, 3, 4; with error: 1, 2, 3, 4
Shelf voltages by element:
[1] sensor condition
[2] sensor condition
[3] sensor condition
[4] sensor condition

  • The following output can be confirmed from the EMS log

[?] Fri May 23 02:00:00 +0700 [tbsh10102: statd: monitor.shelf.warning:error]: Fault reported on disk storage shelf attached to channel 0b. Check fans, power supplies, disks, and temperature sensors.
[?] Fri May 23 03:00:00 +0700 [tbsh10102: statd: monitor.shelf.warning:error]: Fault reported on disk storage shelf attached to channel 0b. Check fans, power supplies, disks, and temperature sensors.

  •  SP FW and shelf FW is on latest version and rebooting service processor did not clear the error on the internal shelf

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