Onboard Raid Controller Battery (Megaraid Romb) - NEC NovaScale R480 E1 User Manual

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Creating a RAID 6 Logical Drive
You need to use four or more Physical Devices to create the Logical Drive of RAID 6 using the Universal RAID Utility.
If you want to create the Logical Drive from three Physical Devices, you need to use WebBIOS.

Onboard RAID Controller Battery (MegaRAID ROMB)

Features
Use an optional Additional Battery Backup for the Onboard RAID Controller (MegaRAID ROMB).
With the following features, the possibility of data loss due to an unexpected accident (e.g., an instantaneous power
failure which may occur in Write Back mode) can be avoided.
Backup of data in the cache memory of the RAID Controller
Improvement of the reliability in the Write Back mode
Adoption of the reusable nickel hydrogen battery
You can see the status of Battery using the Universal RAID Utility. See the "Universal RAID Utility User's
Guide" included in the EXPRESSBUILDER DVD for more information on how to check the Battery status.
IMPORTANT:
when the Battery is being charged or discharged.
NOTE:
The Default Write Policy is factory-set to "Write Through". You need to change
the policy to "Write Back" after installing a battery.
Refresh Battery (Learn Cycle)
The learn cycle of battery is disabled in this controller. The RAID Controller performs a discharging and charging cycle
once when the battery is inserted and immediately after the battery replacement, however, the refresh operation is no
longer performed.
Universal RAID Utility indicates that Cache Mode is [Write Through]
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