Dell EMC SC4020 Owner's Manual page 13

Item Control/Feature
1 Battery status indicator
2 Battery fault indicator
3 MGMT port (Slot 3/Port 1)
4 iSCSI port (Slot 3/Port 2)
5 SAS activity indicators
6 Storage controller status
7 Recessed power off button
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 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
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: The MGMT port can be used as an iSCSI port for replication to
another Storage Center or as a front-end iSCSI port for connections to
host servers.
— Ethernet/iSCSI port that is typically used for replication to another Storage Center
(requires a replication license)
NOTE: The iSCSI port can be used as a front-end port for connections to
host servers.
— 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
On – Storage controller completed a power-on self-test (POST)
Not currently used
• 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.
— 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:
About the SC4020 Storage System 13