Item
Control/Feature
Icon
Description
8
Storage controller fault
•
Off – No faults
•
Steady amber – Firmware has detected an error
•
Blinking amber – Storage controller is performing a 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 – 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 9. SC4020 Storage System Storage Controller with Four 12 Gb Front-End SAS Ports
Item
Control/Feature
Icon
Description
1
Battery status indicator
•
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
2
Battery fault indicator
•
Off – No faults
•
Blinking amber – Correctable fault detected
•
Steady amber – Uncorrectable fault detected; replace battery
3
MGMT port (Slot 3/Port 1)
—
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
