Node takeover and battery sensors read not_available in BMC

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Visibility:: Public

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Category:: ontap-9

Specialty:: hw

Last Updated:

Applies to

ONTAP 9
AFF C60
AFF A90
AFF A20

Issue

Many sensors show not_available on BMC and node goes into takeover.
Node unresponsive to pinging.
Events logs:

Thu May 15 08:08:45 +0000 [Node: env_mgr: nvmem.battery.unread:EMERGENCY]: The NVMEM battery state cannot be determined because the 'Bat Full Cap' sensor is unreadable. To prevent data loss, the system will shut down in 20 minutes. Thu May 15 08:08:45 +0000 [Node: env_mgr: nvmem.battery.unreadHrs:EMERGENCY]: The NVMEM battery state cannot be determined because the 'Bat Charge Curr' sensor is unreadable. To prevent data loss, the system will shut down in in 24 hours. Thu May 15 08:08:55 +0000 [Node: env_mgr: nvmem.battery.unread:EMERGENCY]: The NVMEM battery state cannot be determined because the 'Bat Design Cap' sensor is unreadable. To prevent data loss, the system will shut down in 20 minutes. Thu May 15 08:09:15 +0000 [Node: env_mgr: nvmem.battery.unreadHrs:EMERGENCY]: The NVMEM battery state cannot be determined because the 'Bat Charge Volt' sensor is unreadable. To prevent data loss, the system will shut down in in 24 hours. Thu May 15 08:09:16 +0000 [Node: env_mgr: nvmem.battery.unread:EMERGENCY]: The NVMEM battery state cannot be determined because the 'Bat Dstg Cycles' sensor is unreadable. To prevent data loss, the system will shut down in 20 minutes.

Many battery sensors before node takeover show not_available:

Bat Status normal 1 -- -- -- -- Bat Present PRESENT Bat Dcharge FET ON Bat Charge FET ON Bat Pack Invalid OK Bat Learning Active OFF Bat Temp not_available -- C -5 C 0 C 55 C 60 C Bat Volt not_available -- mV 5500 mV 5750 mV 8300 mV 8500 mV Bat Curr not_available -- mA -26910 mA -25990 mA 1150 mA 1380 mA Bat Rem Cap not_available -- W*hr 2550 W*hr 3000 W*hr 17475 W*hr 18000 W*hr Bat Full Cap not_available -- W*hr 5775 W*hr 6000 W*hr 17475 W*hr 18000 W*hr Bat Charging State invalid -- Bat Pct Capacity invalid -- % 39 % 44 % -- -- Bat Charge Curr not_available -- mA -- -- -- -- Bat Charge Volt not_available -- mV 6000 mV 6200 mV 8400 mV 8600 mV Bat Design Cap not_available -- W*hr -- -- -- -- Bat Dstg Cycles not_available -- cycles 2 cycles 3 cycles -- -- Bat Cycle Count not_available -- cycles -- -- -- 450 cycles Bat FRU LED invalid -- Battery Charge Failed? invalid -- Battery Charge Bad? invalid -- Battery Capacity Message GOOD