Avago Technologies Cache Protection for RAID Controller Cards - Manual (Page 114)

Avago Technologies
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Cache Backup Products for MegaRAID SAS+SATA RAID Controllers User Guide
May 2015 Chapter 3: Monitoring and Managing Battery Backup Units and CacheVault Modules
Monitoring and Managing BBU Units with the MegaRAID Configuration Utilities
— Capacity information
— Auto Learn properties and settings
Figure 81 Battery Module Screen
Most of the Battery Module properties are view-only and are self-explanatory.
In the lower right corner of the screen are the auto learn options. A learning cycle is a battery calibration operation
performed by the controller periodically to determine the condition of the battery. You can change the learn
delay interval (the length of time between automatic learning cycles) and the auto learn mode.
NOTE Leave the learn delay interval and the auto learn mode at their
default settings.
NOTE To increase the life of a battery, the battery is not fully charged. Band
Gap charging keeps the maximum battery charge within a band
comfortably above the time requirement instead of keeping the
battery charged to the maximum level. However, when a learn cycle is
required, the battery is fully charged because a learn cycle starts only
after the battery is fully charged.
3.1.1.2 Setting the Learn Delay Interval
The learn delay interval is the length of time between automatic learning cycles. Perform the following steps to
change the interval:
1. Open the drop-down menu in the Auto Learn Mode field.
2. Select the learn mode as Auto (the default) so the controller performs the learning cycle automatically.
3. Change the number of hours in the Learn Delay Interval field.
You can delay the start of the learn cycles for up to 168 hours (7 days).
4. Click Go to set the interval.