Dell PowerEdge RAID Controller 6i - Manual (Page 31)

About PERC 6 and CERC 6i Controllers
31
Battery Warranty Information
The BBU offers an inexpensive way to protect the data in cache memory.
The lithium-ion battery provides a way to store more power in a smaller form
factor than previous batteries.
The BBU shelf life has been preset to last six months from the time of
shipment without power. To prolong battery life:
• Deploy the BBU within six months of ship date.
• Do not store or operate the BBU above 60°C.
• Disconnect the BBU if the system is going to be turned off (power
disconnected) for longer than one week.
Your PERC 6 battery may provide up to 24 hours of controller cache memory
backup power when new. Under the 1-year limited warranty, we warrant that
the battery will provide at least 24 hours of backup coverage during the 1-year
limited warranty period.
Battery Learn Cycle
Learn cycle is a battery calibration operation performed by the controller
periodically to determine the condition of the battery. This operation cannot
be disabled.
You can start battery learn cycles manually or automatically. In addition, you
can enable or disable automatic learn cycles in the software utility. If you
enable automatic learn cycles, you can delay the start of the learn cycles for
up to 168 hours (7 days). If you disable automatic learn cycles, you can start
the learn cycles manually, and you can choose to receive a reminder to start
a manual learn cycle.
You can put the learn cycle in Warning Only mode. In the Warning mode,
a warning event is generated to prompt you to start the learn cycle manually
when it is time to perform the learn cycle operation. You can select the
schedule for initiating the learn cycle. When in Warning mode, the controller
continues to prompt you to start the learn cycle every seven days until it is
performed.
NOTE:
Virtual disks automatically switch to Write-Through mode when the battery
charge is low because of a learn cycle.
Dell_PERC6.1_UG.book Page 31 Wednesday, April 15, 2009 4:18 PM