Table 4. MD3400 and MD3420 Series SAS RAID Controller Module
Item Component Function
1 16 Gbps FC IN port (4) Provides host-to-controller FC connection.
2 Seven segment display
sequence
Displays status or error codes for the storage array.
3 Controller power LED Lights green when controller power is on.
Turns off when controller is not powered.
4 Controller fault LED Lights amber when controller fault is detected.
Turns off when controller is operating normally
5 System identification LED Blinks blue when system identification switch push-
button on enclosure front panel is pressed.
6 Cache active or cache offload
LED
Lights green when on-board controller memory
contains data.
If AC power fails, this LED changes to indicate Cache
Offload status. If the password reset function has
successfully changed the password, this LED flashes
on and off briefly.
NOTE: The password reset switch is not
available if your system was shipped after
September, 2015. The password reset switch
functionality was disabled starting from
controller firmware 08.20.09.60 and later
versions.
7 Battery fault Lights amber when battery backup unit or battery has
failed.
Turns off when battery backup unit is operating
normally
8 Management port Provides a 100/1000 Mbps Ethernet connection for
out-of-band management of the enclosure.
9 Ethernet port (reserved) Reserved port.
10 SAS IN port (2) Provides host-to-controller SAS connection.
11 USB port Does not provide any functionality.
12 Mini USB port Reserved port.
13 Password reset switch Activating this switch resets the password.
13
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