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3. Reconditioning the battery (Learn Cycle)
The disk array controller executes a learn cycle which discharges and charges the battery
every 30 days. Learn Cycle calibrates accurate battery information and refrains from
reducing its capacity by battery memory effect. It takes about 12 hours to finish a learn
cycle. However please note that write performance of the controller can be dropped down
because write policy of the controller becomes write thru during the learn cycle. If you want
to avoid performance drop, please change "Auto Learn Mode" from Auto to Disable. "Auto
Learn Mode" can be changed on WebBIOS or MegaRAID Storage Manager. See the
following procedures for details. To disable learn cycle, please select "disabled" at auto
learn mode and then click "Go" to apply. See the screen copy below.
While the battery is charging or discharging, do not change Auto Learn Mode to
Disabled or Warn. Or the battery would stop charging or discharging. Check if
current write policy is write back before you change the mode to disabled. For
checking current write policy, see section 2 "Checking by Utility" in this chapter.
Notice
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