Sun Microsystems Sun Fire V440 Diagnostics And Troubleshooting Manual page 22

SERIAL MGT
NET MGT
SCSI,
USB and
Ethernet
Ports
FIGURE 1-1
Consider also that some diagnostics must function even when the system fails to
boot. Any diagnostic capable of isolating problems when the system fails to boot
must be independent of the operating system. But any diagnostic that is
independent of the operating system will also be unable to make use of the
operating system's considerable resources for getting at the more complex causes of
failures.
Another complicating factor is that different sites have differing diagnostic
requirements. You may be administering a single computer or a whole data center
full of equipment in racks. Alternatively, your systems may be deployed remotely—
perhaps in areas that are physically inaccessible.
4 Sun Fire V440 Server Diagnostics and Troubleshooting Guide • July 2003
Memory
Motherboard
JBus
I/O
Bridge
PCI
Bus
TTYB
SCSI Disk
Controller
Ethernet
Controller
Simplified Schematic View of a Sun Fire V440 Server
Memory
CPU 0 CPU 1
Bus Repeater Circuit
PCI
Bus
XBus
PCI
Bridge
ALOM
USB
& DVD
Controllers
PCI
Bus
PCI Slots
To power supplies, fans, and other components
Memory Memory
CPU 2 CPU 3
Boot
PROM
SCC PCI Slots
2
Ethernet
I C
Controller
Controller
2
I C
Bus
JBus
JBus
I/O
Bridge
PCI
Bus