Cisco UCS C460 Installation And Service Guide

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Cisco UCS C460 Server Installation and Service Guide
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Chapter 3 Maintaining the Server
Installing or Replacing Server Components
Replacing the SAS Riser Battery Backup Unit
Note This optional battery backup unit (BBU) is available only when using the optional LSI 9260-8i SAS
RAID controller card as the SAS riser. This BBU provides approximately 72 hours of battery backup for
the disk write-back cache DRAM in the case of sudden power loss.
Note LSI recommends that you replace the LSI BBU once per year or after 1,000 recharge cycles, whichever
comes first. Verify whether BBU replacement is required by looking in the CIMC. Log in to CIMC for
the server, then click Server—Inventory—Storage—Battery Backup Unit. If the Battery Replacement
Required field says, “True,” then you must purchase a replacement BBU and replace it.
Warning There is danger of explosion if the battery is replaced incorrectly. Replace the battery only with the
same or equivalent type recommended by the manufacturer. Dispose of used batteries according to
the manufacturer’s instructions.

Statement 1015
The qualified and supported part numbers for this component are subject to change over time. For the most
up-to-date list of replaceable components, see the following URL and then scroll to Technical Specifications:
http://www.cisco.com/en/US/products/ps10493/products_data_sheets_list.html
To replace the SAS riser BBU, follow these steps:
Step 1 Remove the BBU that you are replacing. See Figure 3-11.
a. Power off the server as described in the “Shutting Down and Powering Off the Server” section on
page 3-6.
b. Slide the server out the front of the rack far enough so that you can remove the top cover.
Note You might have to detach cables from the rear panel to provide clearance.
Caution If you cannot safely view and access the component, remove the server from the rack.
c. Remove the top cover as described in the “Removing and Replacing the Server Top Cover” section
on page 3-7.
d. Remove the memory riser that sits closest to the BBU. See Replacing Memory Risers, page 3-26.
e. Slide the battery assembly toward the front of the chassis to disengage its retaining clips from the
chassis wall slots.
f. Disconnect the cable that is attached to the BBU.

Cisco UCS C460 Specifications

General

Brand	Cisco
Model	UCS C460
Category	Server
Language	English