Sun Microsystems Sun Fire V480, Руководство администратора

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Chapter 2 System Overview 13
The backplane provides dual-loop access to each of the FC-AL disk drives. One loop
is controlled by an on-board FC-AL controller integrated into the system
centerplane. The second loop is controlled by a PCI FC-AL host adapter card
(available as a system option). This dual-loop configuration enables simultaneous
access to internal storage via two different controllers, which increases available I/O
bandwidth. A dual-loop configuration can also be combined with multipathing
software to provide hardware redundancy and failover capability. Should a
component failure render one loop inaccessible, the software can automatically
switch data traffic to the second loop to maintain system availability. For more
information about the system’s internal disk array, see “About FC-AL Technology”
on page 47, “About the FC-AL Backplane” on page 48, and “About the FC-AL Host
Adapters” on page 50.
External multidisk storage subsystems and redundant array of independent disks
(RAID) storage arrays can be supported by installing single-channel or multichannel
PCI host adapter cards along with the appropriate system software. Software drivers
supporting FC-AL and other types of devices are included in the Solaris operating
environment.
The system provides two on-board Ethernet host PCI adapters, which support
several modes of operations at 10, 100, and 1000 megabits per second (Mbps).
Additional Ethernet interfaces or connections to other network types can be
provided by installing the appropriate PCI interface cards. Multiple network
interfaces can be combined with multipathing software to provide hardware
redundancy and failover capability. Should one of the interfaces fail, the software
can automatically switch all network traffic to an alternate interface to maintain
network availability. For more information about network connections, see “How to
Configure the Primary Network Interface” on page 150 and “How to Configure
Additional Network Interfaces” on page 152.
The Sun Fire V480 server provides a serial communication port, which you can
access through an RJ-45 connector located on the system’s back panel. For more
information, see “About the Serial Port” on page 51.
The back panel also provides two Universal Serial Bus (USB) ports for connecting
USB peripheral devices such as modems, printers, scanners, digital cameras, or a
Sun Type 6 USB keyboard and mouse. The USB ports support both isochronous
mode and asynchronous mode. The ports enable data transmission at speeds of 12
Mbps. For additional details, see “About the USB Ports” on page 52.
The local system console device can be either a standard ASCII character terminal or
a local graphics console. The ASCII terminal connects to the system’s serial port,
while a local graphics console requires installation of a PCI graphics card, monitor,
USB keyboard, and mouse. You can also administer the system from a remote
workstation connected to the Ethernet or from a Sun Remote System Control (RSC)
console.