Item Control/Feature Icon Description
NOTE: The iSCSI port can be used as a front-end port for
connections to host servers.
5 SAS activity indicators — There are four SAS PHYs per SAS port.
• Off: SAS PHY is not connected
• Steady green: SAS PHY is connected, but not active
• Blinking green: SAS PHY is not connected nor active
6 Storage controller status On: Storage controller completed POST
7 Recessed power off
button
Not currently used
8 Storage controller fault
• Off: No faults
• Steady amber: Firmware has detected an error
• Blinking amber: Storage controller is performing POST
9 Recessed reset button Not currently used
10 Identification LED
• Off: Identification disabled
• Blinking blue (for 15 sec.): Identification is enabled
• Blinking blue (continuously): Storage controller shut down
to the Advanced Configuration and Power Interface (ACPI)
S5 state
11 USB port One USB 3.0 connector
NOTE: For engineering use only.
12 Diagnostic LEDs (8) —
• Green LEDs 0–3: Low byte hex POST code
• Green LEDs 4–7: High byte hex POST code
13 Serial port (3.5 mm mini
jack)
Used to perform initial storage controller configurations. In
addition, it is used to perform support only functions when
instructed by Dell Technical Support.
14 Two options:
• Four Fibre Channel
ports (Slot 1/Port 1,
Slot 1/Port 2, Slot 1/
Port 3, and Slot 1/
Port 4) with three
LEDs per port
• Two Fibre Channel
ports (Slot 1/Port 1
and Slot 1/Port 2)
with three LEDs per
port
— LEDs for the four 8 Gb Fibre Channel ports:
• All off: No power
• All on: Booting up
• Blinking amber: 2 Gbps activity
• Blinking green: 4 Gbps activity
• Blinking yellow: 8 Gbps activity
• Blinking amber and yellow: Beacon
• All blinking (simultaneous): Firmware initialized
• All blinking (alternating): Firmware fault
LEDs for the two 16 Gb Fibre Channel ports:
• All off: No power
• All on: Booting up
• Blinking amber: 4 Gbps activity
• Blinking green: 8 Gbps activity
• Blinking yellow: 16 Gbps activity
20
About the SC4020 Storage System
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