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Sun Microsystems, Inc.
Front Access
Normal operations in a deployed environment typically involve, at some point, tasks such as putting a server in
standby mode, swapping a hard disk drive, or re-configuring the system. With the Netra 240 server, administra-
tors can accomplish such tasks through a push button switch, a rotary switch, and a System Configuration card—
all accessible behind the front bezel. Administrators can access these simple-to-use features by opening the front
of the server and flipping open the front bezel, which stays down in place.
The push button switch is normally used to power on the server. Administrators can also use the switch to put
the server in a power-standby mode (the rotary switch must be set to enable standby mode). In standby mode, the
server is not functional but ALOM continues to run.
The rotary switch on the Netra 240 server provides added control over the system power state and security for
server operation as well as a level of diagnostics. Administrators can use the rotary switch to:
• Disable power control through the push button switch and/or remote power control
• Force the system into the standby state
• Write-protect internal PROMs (OBP, POST, and System Management Controller PROMs)
• Force diagnostics tests (such as power-on self-tests [POST]) during system boot
• Disable suspension to the boot PROM or kernel debuggers (such as Kadb)
Motherboard
The Netra 240 server utilizes a state-of-the-art, compact motherboard. Features integrated into, or supported by,
the motherboard include:
• Up to two UltraSPARC IIIi processors, each with 1 MB of L2 cache
• Flash PROM housing the system firmware, internal diagnostics, and POST
• Eight Sun DDR-1 SDRAM PC2100 DIMM slots (four per processor)
• Four 10/100/1000BaseT Ethernet ports
• Internal Ultra160 SCSI connector for internal hard disks
• External Ultra160 SCSI connector for optional mass storage devices
• Two asynchronous serial ports (one general purpose, one for server management)
• One 10BaseT server management port
Netra 240 Server Architecture P7
Figure 2-2: The front bezel flips down to open. Hard disk drives and the System Configuration Card are accessible
from the front.
Hard disk drive
Hard disk drive
System Configuration
Card
Rotary switch
Bezel
Push button
switch