Fujitsu PRIMERGY TX2560 M2

318 Upgrade and Maintenance Manual TX2560 M2 / RX2560 M2
Expansion cards and backup units
9.4 Backup Units
9.4.1 Basic information
The Flash Backup Unit (FBU) backs up the memory contents of the connected
SAS RAID controller in the event of a power failure. The server can
accommodate up to two backup units.
Figure 223: FBU mounting positions
FBU 1
FBU 2