138 Upgrade and Maintenance Manual CX2550/60/70 M4
Expansion cards and OCP mezzanine cards
6.4 Backup Unit
6.4.1 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.
I FBU is supported only by CX2560 M4 and CX2570 M4 with air cooling.
Figure 40: FBU mounting position
Figure 41: FBU
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