Item Control/Feature Icon Description
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 iSCSI ports (Slot 1/
Port 1 and Slot 1/Port 2)
with one LED per port
—
• Off: No power
• Steady Amber: Link
• Blinking Green: Activity
15 Mini-SAS port B (Slot 2/
Port 2)
Back-end expansion port B
16 Mini-SAS port A (Slot 2/
Port 1)
Back-end expansion port A
SC4020 Storage System Storage Controller with Front-End SAS Ports
The following figure shows the features and indicators on a storage controller with front-end SAS ports.
Figure 12. SC4020 Storage System Storage Controller with Four 12 Gb Front-End SAS Ports
22
About the SC4020 Storage System
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