Dell EMC SC4020 Owner's Manual page 14

Item Control/Feature
15 Mini-SAS port B (Slot 2/Port 2)
16 Mini-SAS port A (Slot 2/Port 1)
SC4020 Storage System Storage Controller with iSCSI Front-End
Ports
The following figure shows the features and indicators on a storage controller with iSCSI front-end ports.
Figure 8. SC4020 Storage System Storage Controller with Two 10 GbE iSCSI Front-End Ports
Item Control/Feature
1 Battery status indicator
2 Battery fault indicator
3 MGMT port (Slot 3/Port 1)
4 REPL port (Slot 3/Port 2)
5 SAS activity indicators
6 Storage controller status
7 Recessed power off button
14 About the SC4020 Storage System
Icon Description
• All off – No power
• All on – Booting up
• Blinking amber – 4 Gbps activity
• Blinking green – 8 Gbps activity
• Blinking yellow – 16 Gbps activity
• Blinking amber and yellow – Beacon
• All blinking (simultaneous) – Firmware initialized
• All blinking (alternating) – Firmware fault
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: 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
NOTE: The REPL port can be used as a front-end iSCSI 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