TX150 S8 / TX200 S7
Upgrade and Maintenance Manual 223
Expansion cards and backup units
9.5 Backup Units
9.5.1 Basic information
The Battery Backup Unit (BBU) or Flash Backup Unit (FBU) backs up the
memory contents of the connected SAS RAID controller in the event of a power
failure. The PRIMERGY TX150 S8 / TX200 S7 server can accommodate up to
two backup units.
Figure 149: BBU / FBU mounting positions
1 Mounting position for first BBU / FBU
2 Mounting position for second BBU / FBU
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