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3ware® User Guide > Maintaining Your Controller > Viewing Battery Information

Viewing Battery Information
The Battery Backup Unit (BBU) is an add-on card that can be attached to most 3ware 9000 RAID controllers to supply power from a battery pack in the event of a system power loss. This allows the controller to use write-caching for optimal performance and to preserve data in the event of a system power failure. When fully charged, the battery preserves the contents of the cache memory for up to 72 hours. When power is restored, the cached write data is written to the disks.
The 9650SE can use the BBU-Module-03 or BBU-Module-04. The 9690SA uses BBU-Module-04. For a list of 3ware RAID controllers and compatible BBU modules, see http://www.3ware.com/KB/article.aspx?id=15008.
You can see information about a battery backup unit attached to your controller in both 3DM 2 and 3BM.
 
Note: When the BBU status is not “Ready,” write caching is automatically disabled on all units attached to the controller
To view information about a BBU in 3DM 2
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On the menu bar, choose Monitor > Battery Backup.
The Battery Backup page appears, on which you can see details and status about the unit. This page is refreshed every 30 seconds.
For details about the fields on this page, see Battery Backup page.
To view information about a BBU in 3BM
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At the main 3BM screen, tab to the Information button and press Enter.
On the pop-up menu, select Battery Backup and press Enter.
The Battery Backup Unit screen appears.
The fields on this screen are the same as those available through 3DM. For details about the fields, see Battery Backup page.

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