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. 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 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 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
About the SC4020 Storage System
23
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