Item
Name
Icon
Description
•
Off – No power
•
On steady blue – Power is on and firmware is running
•
Blinking blue – Storage system is busy booting or updating
•
On steady amber – Hardware detected fault
•
Blinking amber – Software detected fault
3
Identification button
Lights when the storage system identification is enabled.
•
Off – Normal status
•
Blinking blue – Storage system identification enabled
4
Unit ID display
—
Displays the storage system identification number. The default value for a new
storage system is 01.
5
Hard drives
—
Can have up to 24 2.5-inch SAS hard drives.
SC4020 Storage System Back-Panel Features and
Indicators
The back panel of the SC4020 contains the storage controller indicators and power supply indicators.
Figure 5. SC4020 Storage System Back-Panel View
Item
Name
Icon
Description
1
Power supply/cooling fan
module (PSU) (2)
—
Contains a 580 W power supply and fans that provide cooling for the storage
system.
2
Battery backup unit
(BBU) (2)
—
Allows the storage controller to shut down smoothly when a loss of AC power is
detected.
3
Storage controller
(2)
—
Each storage controller contains:
•
Back-end ports – Two 6 Gbps SAS ports
•
Front-end ports – Fibre Channel ports, iSCSI ports, or SAS ports
•
MGMT port – Embedded Ethernet/iSCSI port that is typically used for system
management
•
REPL port – Embedded iSCSI port that is typically used for replication to
another Storage Center
•
Serial port – Used for initial configuration and support functions
4
Cooling fan fault indicator
(2)
•
Off – Normal operation
About the SC4020 Storage System
11
