Security Analytics Dell appliance error: "Battery requires reconditioning; please initiate a LEARN cycle;"


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Solution

Overview
On some Dell-based Security Analytics appliances, a RAID controller may report that its battery requires conditioning using a manual learn cycle:

Adapter 1; seqNum: 0x0000dc88; Time: Mon Feb 23 12:40:05 2015; Event Description: Current capacity of the battery is below threshold;
Adapter 1; seqNum: 0x0000dc81; Time: Mon Feb 23 12:20:35 2015; Event Description: Battery requires reconditioning; please initiate a LEARN cycle;
Adapter 1; seqNum: 0x0000dc82; Time: Mon Feb 23 12:20:35 2015; Event Description: BBU disabled; changing WB virtual disks to WT, Forced WB VDs are not affected;
Adapter 1; seqNum: 0x0000dc80; Time: Mon Feb 23 12:20:35 2015; Event Description: Battery life has degraded and cannot initiate transparent learn cycles;


Further information from Dell at this page: Dell PERC controller learn cycle mode
Cause
Resolution
Run a manual BBU learn cycle on the reporting adapter (in the case above, it is Adapter 1).

As root, run:
# megacli -adpbbucmd -bbulearn -a<adapter-number>

For Adapter 1, the command would be:
# megacli -adpbbucmd -bbulearn -a1

This cycle will run for approximately seven hours; during that time the controller will switch to Write-Through mode, which may reduce performance of the appliance.
Workaround
Additional Information
Bug Number
InQuira Doc Id
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First Published      07/07/2015
Last Modified      06/01/2016
Last Published      07/07/2015
Article Audience
Product      DS 2G, DS 10G, DS CMC
Software      Security Analytics, Solera OS
Topic      Errors / Event Logs / Alerts, Hardware
Article Number      000025751
Summary      On some Dell-based Security Analytics appliances, a RAID controller may report that its battery requires conditioning. This can be resolved from the command line.
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