Back-End Connectivity
Back-end connectivity refers to the SAS cabling between the storage system and expansion enclosures. If expansion enclosures are not
used, back-end connectivity refers to the SAS cabling between the storage controllers.
An SC4020 storage system supports back-end connectivity to multiple expansion enclosures.
System Administration
To perform system administration, the Storage Center communicates with computers using the Ethernet management (MGMT) port and
serial port on the storage controllers.
•
Ethernet port
: Used for configuration, administration, and management of Storage Center.
NOTE:
The baseboard management controller (BMC) does not have a separate physical port on the SC4020. The
BMC is accessed through the same Ethernet port that is used for Storage Center configuration, administration, and
management.
•
Serial port
: Used for initial configuration of the storage controllers. In addition, it is used to perform support only functions when
instructed by Dell Technical Support.
NOTE:
Do not throw away the serial cables that come with the SC4020. Keep the serial cables with the SC4020 for
troubleshooting purposes.
SC4020 Storage System Hardware
The SC4020 storage system ships with Dell Enterprise Plus drives, two redundant power supply/cooling fan modules, and two redundant
storage controllers.
Each storage controller contains the front-end, back-end, and management communication ports of the storage system.
SC4020 Storage System Front-Panel Features and
Indicators
The front panel of the SC4020 contains power and status indicators, a system identification button, and a unit ID display.
In addition, the hard drives are installed and removed through the front of the storage system chassis.
Figure 4. SC4020 Storage System Front-Panel View
Item
Name
Icon
Description
1
Power indicator
Lights when the storage system power is on.
•
Off – No power
•
On steady green – At least one power supply is providing power to the storage
system
2
Status indicator
Lights when at least one power supply is supplying power to the storage system.
10
About the SC4020 Storage System
