Owners Manual

Item Control/Feature Icon Description
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.
To use the MGMT port as a front-end connection to host servers, a Flex
Port license is required.
4 REPL port (Slot 3/Port 2) — Ethernet/iSCSI port that is typically used for replication to another Storage Center
NOTE: To use the RELP port as a front-end connection to host servers,
a Flex Port license is required.
5 SAS activity indicators — 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
6 Storage controller module
status
On – Storage controller completed a power-on self-test (POST)
7 Recessed power off button Not currently used
8 Storage controller module 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
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) Not for customer use
14 Four Mini-SAS High Density
(HD) ports (Slot 1/Port 1, Slot
1/Port 2, Slot 1/Port 3, and Slot
1/Port 4)
— Front-end connectivity ports
NOTE: The mini-SAS HD ports are used for front-end connectivity only
and cannot be used for back-end expansion.
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
16 About the SC4020 Storage System