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

  1. Last updated
    Jan 29, 2025
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Category:
fas-systems
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hw
Last Updated:
1/29/2025, 6:23:23 PM

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Applies to

  • AFF A200
  • AFF A300 / FAS8200
  • FAS2650 / FAS2620
  • SP firmware 5.0.1
  • SP firmware 5.1

Issue

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

event log show -severity * -event *battery*

[ClusterA-01: 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.
[ClusterA-01: 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):

SP> event search Bat

SP> event search Attn_Sensor

12:00:16 [IPMI.notice]: 1401 | 02 | EVT: 0301ffff | Bat_Lrn_Active | Assertion Event, "State Asserted"     <<< Start of learning cycle
12:32:13 [IPMI.notice]: 1501 | 02 | EVT: 0301ffff | Bat_Chg_FET_Flt | Assertion Event, "State Asserted"   <<< Failure during learning
12:32:13 [IPMI.notice]: 1601 | 02 | EVT: 0301ffff | Attn_Sensor1 | Assertion Event, "State Asserted"
12:32:20 [IPMI.notice]: 1701 | 02 | EVT: 0300ffff | Bat_Chg_FET_Flt | Assertion Event, "State Deasserted"  <<< Recovery
12:32:26 [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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