Powering Off The Server; To Perform A Hardware Power-Off - Sun Microsystems Netra CT Service Manual

2.2

Powering Off the Server

You can power off the Netra CT server in three ways:
Graceful hardware power-down
I
Ungraceful hardware power-down
I
Graceful software power-down
I
If you do not have a terminal hookup to your server and your CPU is functioning
normally, you should go through a graceful hardware power-down for your server.
For a graceful hardware power-down, you would press the system power button for
less than four seconds. This will start the orderly power-down sequence in a manner
that no persistent OS data structures are corrupted. In the orderly power-down,
applications in service may be abnormally terminated and no further services will be
invoked by the CPU.
If you do not have a terminal hookup to your server and your CPU is not
functioning normally, you will not be able to go through a graceful hardware power-
down; you will have to go through an ungraceful hardware power-down instead.
For an ungraceful hardware power-down, you would press the system power button
for more than four seconds. This will immediately shut the system down without
making any attempts to keep the persistent OS data structures from being corrupted.
A graceful software power-down is a normal power-down using a terminal
connected to your server, where you would log onto the server as root, then execute
a software command to bring the server down safely.
For hardware power-down instructions, go to
I
Hardware Power-Off" on page
For software power-down instructions, go to
I
Software Power Off" on page
2.2.1

To Perform a Hardware Power-Off

1. In preparation for bringing down the operating system and powering off the
server, ensure that all significant application activity is quiesced on the server.
2. Go to the front of the Netra CT server and locate the system status panel.
The location of the system status panels in the Netra CT 810 server and Netra CT 410
server is illustrated in
3. Locate the system power button on the system status panel.
FIGURE 2-3
FIGURE 2-4
2-6 Netra CT Server Service Manual • January 2004
FIGURE 2-2
shows the system power button location for the Netra CT 810 server, and
shows the system power button location for the Netra CT 410 server.
Section 2.2.1, "To Perform a
2-6.
Section 2.2.2, "To Perform a
2-7.
.