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FAS2820 reports NVRAM battery Bat Dstg Cycles warnlow

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Applies to

  • FAS2820
  • ONTAP 9

Issue

  • The following ems log shows in HA Group Notification (BATTERY_LOW) ALERT.

Tue Feb 04 11:09:01 +0900 [Cluster02-01: statd: monitor.nvramLowBattery:EMERGENCY]: NVRAM battery is dangerously low.
Tue Feb 04 11:09:01 +0900 [Cluster02-01: statd: monitor.nvramLowBattery.notice:notice]: If the NVRAM battery is dangerously low, the system shuts down automatically every 24 hours to encourage you to replace it. If you reboot the system it will run for another 24 hours before shutting down.
Tue Feb 04 11:09:01 +0900 [Cluster02-01: statd: callhome.battery.low:alert]: Call home for BATTERY_LOW.

  • Node down with the following BMC log.

Record 438: Tue Feb 04 01:52:46.873400 2025 [IPMI.emergency]: env_mgr triggers OS halt:Battery remaining des
Record 439: Tue Feb 04 02:12:05.276329 2025 [IPMI.notice]: 0124 | 02 | EVT: 81520402 | Bat_Dstg_Cycles | Deassertion Event, "Lower Critical going low " | Reading: 4.000 | Threshold: 2.000

  • Bat Dstg Cycles lower than 5 cycles.

Bat FRU LED                                OFF
Battery RemCap Desc                      READY
Battery Charge Failed?                   FALSE　
Battery Charge Bad?                      FALSE　
Battery Capacity Message                  GOOD
Voltage Spike Frequency  normal             0          --          --          --           3
Voltage Status                            GOOD
Bat Present                             PRESENT
Bat Temp                 normal            36 C         0 C         5 C        60 C        75 C
Bat Volt                 normal          6800 mV     5500 mV     5600 mV     8500 mV     8600 mV
Bat Curr                 normal          1000 mA       --          --        1200 mA     1520 mA
Bat Rem Cap              normal             1 W*hr     --          --          --          --
Bat Dstg Cycles          warnlow            3 cycles    2 cycles    5 cycles   --          --
Bat Full Cap             normal            16 W*hr     --          --          --          --
Bat Initial FCC          normal            20 W*hr     --          --          --          --
Bat Charge Curr          normal          1000 mA       --          --        2200 mA     2300 mA
Bat Charge Volt          normal          8200 mV       --          --        8900 mV     9000 mV
Bat Dcharge FET                             ON
Bat Charge FET                              ON
Bat Cycle Count          normal             0 cycles   --          --          --          --
Bat Learning Active                        OFF
Bat Pack Invalid                            OK
Bat Charging State                      CHARGING
Bat Pct Capacity         normal            80 %        39 %        44 %        --          --

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