Stale error state for fans on NSM100 module cause errant fault LED

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Category:: disk-shelves

Specialty:: HW

Last Updated:

Applies to

NS224 shelf
NSM100 module

Issue

Amber fault LED in NSM100 module after reboot, reseat or replacement.
EMS warning:

ses.status.fanWarning:notice]: NS224NSM100 (S/N serial) shelf 0 on channel 0x cooling fan warning for Cooling element 1: not operating. This element is on the unknown location.

Output of system node run -node <node> -command storage show fault -v indicates one or more fan sensors as OK with FAIL
Example:

Fans:

Element Status         Status Bytes  Status Descriptions

(...)

11: OK                01,02,86,61   FAIL

12: OK                01,02,79,21

13: OK                01,02,6D,21

14: OK                01,02,7A,21

15: OK                01,02,74,61   FAIL

(...)

Fans are, however, working correctly, confirmed with system node run -node * -command environment status
Example:

Cooling Unit installed element list: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20; with error: none

Cooling Units by element:

[1] 6540 RPM

[2] 6390 RPM

[3] 6650 RPM

(...)

[18] 8090 RPM

[19] 8010 RPM

[20] 8000 RPM

AutoSupport section STORAGE-SHELF.XML may also show Error Type: ACPP under the affecter NSM module