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NVMEM battery reports false alert "The NVMEM battery charge FET is off. To prevent data loss, the system will shut down in 24 hours"

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418
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Category:
fas-systems
Specialty:
hw
Last Updated:

Applies to

  • FAS26xx
  • FAS8200
  • AFF-A200
  • AFF-A300
  • SP firmware 5.0.1
  • SP firmware 5.1

Issue

  • A false alert for NVMEM charge is reported and cleared within a few seconds.

[?] Tue Mar 07 13:32:14 CET [ll-storagecluster-01-02: env_mgr: nvmem.battery.FET.off:alert]: The NVMEM battery charge FET is off. To prevent data loss, the system will shut down in 24 hours.
 [?] Tue Mar 07 13:32:24 CET [ll-storagecluster-01-02: env_mgr: nvmem.battery.FET.normal:notice]: The NVMEM battery charge FET is on

  • The issue appears only during a learning cycle, verify SP event logs for the last learning cycle time stamp (beware that the SP event log tracks time in GMT only):

Record 647: Tue Mar  7 12:00:16 2017 [IPMI.notice]: 1401 | 02 | EVT: 0301ffff | Bat_Lrn_Active | Assertion Event, "State Asserted"     <<< Start of learning cycle
Record 648: Tue Mar  7 12:32:13 2017 [IPMI.notice]: 1501 | 02 | EVT: 0301ffff | Bat_Chg_FET_Flt | Assertion Event, "State Asserted"   <<< Failure during learning cycle
Record 649: Tue Mar  7 12:32:13 2017 [IPMI.notice]: 1601 | 02 | EVT: 0301ffff | Attn_Sensor1 | Assertion Event, "State Asserted"
 Record 650: Tue Mar  7 12:32:20 2017 [IPMI.notice]: 1701 | 02 | EVT: 0300ffff | Bat_Chg_FET_Flt | Assertion Event, "State Deasserted"
 
<<< Recover
Record 651: Tue Mar  7 12:32:26 2017 [IPMI.notice]: 1801 | 02 | EVT: 0300ffff | Attn_Sensor1 | Assertion Event, "State Deasserted"

  • Check the output of "system battery show" form the Service Processor to see when the latest learning cycle started

SP> system battery show
DeviceChemistry   : LION
ChemistryID       : 0x0286
DeviceName        : bq40z50-R1
ID                : 27100045
Manufacturer      : Nexergy
FW_Version        : A1
Manufacturer-date : 10/15/2016
[...]
LrnCyclDaysUntil  : 64
LrnCyclProgress   : 0x00
LrnCycleStartDate : 17-03-07-13:16
 
<<< Start date of the last learning cycle YY/MM/DD
LrnCycleStartFCC  : 0x074a
LrnCycleEndFCC    : 0x074c
LrnCycleEndDate   : 17-03-07-19:45
 
<<< End date of the last learning cycle YY/MM/DD

 

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