Back-end modules
The back-end modules (BEMs), also called disk boards (DKBs), control the transfer of
data between the drives and cache memory. The back-end module LEDs indicate the
operating status of the module.
Number Item Description
1 STATUS LED Green: Back-end module is in the power-
on state.
Red: Back-end module can be removed
safely.
2 PORT LED Blue: Link status is normal.
3 PATH 0 connector Connect to a drive tray.
4 PATH 1 connector Connects to a drive tray.
Back-end modules
Chapter 2: System controller
Hitachi Virtual Storage Platform G900 Hardware Reference Guide 27
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