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Loud Noise from FAN due to IOM Module

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Last Updated:
2/11/2025, 3:05:54 PM

Applies to

  • DS460C Disk Shelf
  • ONTAP 9

Issue

  • The fans are reported as loud, but the fan RPMs report to be in optimal state
  • From environment-shelf


Channel: 0d
Shelf: 12
SES device path: local access: 0d.12.99
Module type: IOM12B; monitoring is active
Shelf status: normal condition

Cooling Units by element:
[1] 5070 RPM
[2] 4440 RPM
[3] 5040 RPM
[4] 4440 RPM
[5] 5100 RPM
[6] 4530 RPM
[7] 5040 RPM
[8] 4440 RPM

 

  • Disks are seen from both paths, but the shelf ID is not reported correctly from one path
  • From sysconfig-a

slot 0: SAS Host Adapter 0a (Broadcom SAS3616W rev. 2, SAS, )
<<snip>>
00123456.55: NETAPP X387_WPSCE16TA07 NA02 14949.1GB 520B/sect (XXXXXXX)
00123456.56: NETAPP X387_WPSCE16TA07 NA02 14949.1GB 520B/sect (XXXXXXX)
00123456.57: NETAPP X387_WPSCE16TA07 NA02 14949.1GB 520B/sect (XXXXXXX)
00123456.58: NETAPP X387_WPSCE16TA07 NA02 14949.1GB 520B/sect (XXXXXXX)
00123456.59: NETAPP X387_WPSCE16TA07 NA02 14949.1GB 520B/sect (XXXXXXX)


From sas expander map, the module reads the shelf ID incorrectly

Level    3: WWN 500a123456789, ID 170, Serial Number '        00123456', Product 'DS46012IOM12    ', Rev '0141', Slot A

 

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