Avago Technologies Cache Protection for RAID Controller Cards - Manual (Page 116)

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
If the Battery State field has a value other than Optimal, the Non-Optimal Reason field appears at the bottom
of the Battery Properties dialog. The Non-Optimal Reason field is a read-only field and states a reason for the
non-optimal state of the battery.
2. Select a battery learn mode from the Learn Mode drop-down list.
The values in the drop-down list differ based on whether the battery supports transparent learn cycles.
— If the battery supports transparent learn, the following values appear in the Learn Mode drop-down list:
— Transparent – The firmware tracks the time since the last learning cycle and performs a learn cycle when it is
due.
— Disabled – The firmware does not monitor or initiate a learning cycle. You can schedule learning cycles
manually.
— Unknown – The firmware warns about a pending learning cycle. You can start a learning cycle manually.
After the learning cycle completes, the firmware resets the counter and warns you when the next learning
cycle time is reached.
— If the battery does not support transparent learn, the following values appear in the Learn Mode drop-down
list:
— Automatic – The firmware tracks the time since the last learning cycle and performs a learn cycle when due.
Write caching need not be disabled.
— Disabled – The firmware does not monitor or initiate a learning cycle. You can schedule learning cycles
manually.
— Disabled (Warning Only) – The firmware never initiates a battery learn cycle but notifies you through events
when a learn cycle is needed.
3. Press OK to change the learn mode.
3.1.3 Monitoring and Managing BBU Units with the MegaCLI Configuration Utility
MegaCLI is a character-based, non-GUI, command line utility that you can use to configure, monitor, and maintain
MegaRAID SAS RAID controllers and the devices connected to them. MegaCLI runs under Red Hat® Linux® and
Microsoft® Windows®.
You can use the commands in this section to view information about BBU units and select the settings for BBU-related
options in MegaCLI.
3.1.3.1 Display BBU Unit Information
Use the command in the following table to display complete information about the BBU unit for the selected
controllers.
Table 4 Display BBU Unit Information
Convention MegaCLI -AdpBbuCmd -aN|-a0,1,2|-aALL
Description Displays complete information about the BBU unit, such as status, capacity information, design information,
and properties.