Dell EMC SC4020 Owner's Manual page 15

Item Control/Feature
8 Storage controller fault
9 Recessed reset button
10 Identification LED
11 USB port
12 Diagnostic LEDs (8)
13 Serial port (3.5 mm mini jack)
14 Two iSCSI ports (Slot 1/Port 1
and Slot 1/Port 2) with one LED
per port
15 Mini-SAS port B (Slot 2/Port 2)
16 Mini-SAS port A (Slot 2/Port 1)
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 9. SC4020 Storage System Storage Controller with Four 12 Gb Front-End SAS Ports
Item Control/Feature
1 Battery status indicator
2 Battery fault indicator
3 MGMT port (Slot 3/Port 1)
Icon Description
• Off – No faults
• Steady amber – Firmware has detected an error
• Blinking amber – Storage controller is performing a POST
Not currently used
• 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
One USB 3.0 connector
NOTE: For engineering use only.
—
• Green LEDs 0–3 – Low byte hex POST code
• Green LEDs 4–7 – High byte hex POST code
Used to perform initial storage controller configurations. In addition, it is used to
perform support only functions when instructed by Dell Technical Support.
—
• Off – power
• Steady Amber – Link
• Blinking Green – Activity
Back-end expansion port B
Back-end expansion port A
Icon Description
• Blinking green (on 0.5 sec. / off 1.5 sec.) – Battery heartbeat
• Fast blinking green (on 0.5 sec. / off 0.5 sec.) – Battery is charging
• Steady green – Battery is ready
• Off – No faults
• Blinking amber – Correctable fault detected
• Steady amber – Uncorrectable fault detected; replace battery
— Ethernet/iSCSI port that is typically used for storage system management and
access to the BMC
NOTE: To use the MGMT port as an iSCSI port for replication to another
Storage Center, a Flex Port license and replication license are required.
About the SC4020 Storage System 15