Avago Technologies Cache Protection for RAID Controller Cards User Manual
Page 122
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
This command sets the BBU mode for the LSIiBBU08 unit and the LSIiBBU09 unit. The following table shows the
various BBU modes.
a.
Indicates how long the battery can hold data in the controller’s memory in case of accidental system
shutdown.
b.
The controller’s performance is not affected during the battery’s learn cycle.
Input example:
storcli /c0/bbu set bbuMode=2
NOTE
BBU modes are supported on any iBBU08/09 BBU/controller
combination and on later-generation controllers.
storcli /cx/bbu set learndelayinterval=
This command sets the learn delay interval for the BBU unit in hours. The value must be between 0 to 168 hours (7
days).
Input example:
storcli /c0/bbu set learnDelayInterval=30
storcli /cx/bbu set powermode=sleep
This command places the battery in low-power storage mode. The battery automatically exits this state after
5 seconds.
Input example:
storcli /c0/bbu set powermode=sleep
storcli /cx/bbu set writeaccess=sealed
This command seals the gas gauge EEPROM write access.
NOTE
Use the set writeaccess=sealed command at manufacturing.
Input example:
storcli /c0/bbu set writeaccess=sealed
sstorcli /cx/bbu set learnStartTime=[DDD HH| off]
This command sets the learn start time for the BBU unit in hours on the day specified. DDD refers to the day of the
week (SUN,MON,....SAT), HH refers to the hours (0-23 hours), and off sets the learn start to off.
Input example:
Table 13 BBU Modes
Mode
Description
0
48 hours of retention
a
at 60 °C, 1-year Service Life.
1
12 hours of retention at 45 °C, 5-year Service Life, transparent learn.
b
2
12 hours of retention at 55 °C, 3-year Service Life, transparent learn.
3
24 hours of retention at 45 °C, 3-year Service Life, transparent learn.
4
48 hours of retention at 45 °C, 3-year Service Life.
5
48 hours of retention at 55 °C, 1-year Service Life.
6
Same as the description for BBU mode 5. The BBU mode 6 enables you to receive events when the battery
capacity reaches suboptimal and critical thresholds.