Item
Control/Feature
Icon
Description
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
SC4020 Storage System Drives
The SC4020 storage system supports only Dell Enterprise Plus hard disk drives (HDDs) and Dell Enterprise solid-state drives (eSSDs).
Figure 10. SC4020 Storage System Drive Indicators
Item
Control/Feature
Indicator Code
1
Drive activity indicator
•
Blinking green – Drive activity
16
About the SC4020 Storage System
