Lenovo 3057 Maintenance Manual page 41

The following illustration shows the rear view of the server.
Figure 16. Rear view of the server
1
Hot-swap redundant power supply 2 (available in
some models)
2
Hot-swap redundant power supply 1
3
PCI Express card area for cards on the riser card
assembly 2
4
PCI Express card area for cards on the riser card
assembly 1
5
Ethernet connector 2 (RJ-45)
6
Four USB connectors
1 Hot-swap redundant power supply 2 (available in some models)
2
Hot-swap redundant power supply 1
The hot-swap redundant power supplies help you avoid significant interruption to the operation of the
system when a power supply fails. You can purchase a hot-swap redundant power supply option from
Lenovo and install the power supply to provide power redundancy without turning off the server.
On each hot-swap redundant power supply, there is a status LED near the power cord connector. When the
LED is lit in green, it indicates that the hot-swap redundant power supply is working correctly. When the LED
is lit in amber, it indicates that the hot-swap redundant power supply is likely to fail or has failed.
7
VGA DB-15 connector
8
Ethernet connector 1 (RJ-45)
9
Ethernet connector 0 for system management (RJ-45)
10
Serial port
11
ID LED
.
Chapter 3 Product overview
27