166 Upgrade and Maintenance Manual TX100 S3
Expansion cards and backup units
9.3 Backup Units (BBU/FBU)
A RAID Cache Backup Unit backs up the memory contents of the connected
SAS RAID controller in the event of a power failure. The PRIMERGY TX100 S3
server can accommodate either a BBU or an FBU depending on the used RAID
controller.
The server offers different backup units:
– BBU (Battery Backup Unit)
– FBU (Flash Backup Unit)
9.3.1 Installing a BBU
V CAUTION!
For further safety information, please refer to chapter "Important
information" on page 29.
9.3.1.1 Required tools
● Preliminary and concluding steps: tool-less
● Installing a BBU: tool-less
9.3.1.2 Preliminary steps
Before installing a BBU, perform the following steps:
Ê Shut down the server as described in section "Shutting down the server" on
page 42.
Ê Remove the AC power cord from the cable tie and disconnect it from the
system as described in section "Disconnecting power cord" on page 43.
Ê Bring the server to its horizontal position.
Ê Open the side cover as described in section "Removing the side cover" on
page 45.
Upgrade and Repair Units (URU)
Average task duration: 5 minutes
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