Turning off a computer is not as simple as turning off a household appliance like a stereo or television set. You must follow a specific procedure before turning off the power.
The SPARCstation 10 system is designed to be left running continuously. Turning the power on and off too frequently can damage the system electrical components. For example, if you power-cycle your system (that is, if you turn its power on and off in rapid succession - 15 times in 15 seconds) you can cause power-surge damage to your system components. However, turning the power off and on a few times during the day (for example, before and after your meal times) is not harmful.
Be sure to follow the procedures in this chapter. Always allow at least 10 seconds between turning off the power on all system components and turning the power on again.
This chapter tells you:
Note - If you are powering up your system for the first time, follow the instructions in "Powering Up Your System" either in Chapter 3 (for a networked system) or in Chapter 4 (for a single system).
Turn off the power if you want to:
After an unexpected outage occurs, turn off the power switches on all your equipment. This protects your equipment from possible power surge damage when power is restored to your building.
Turning the power off at the end of your work day is not necessary, but doing so does not harm the system. Turning the power off conserves energy; but if your system is connected to a network, you will not be able to receive electronic mail messages if power to your system is off.
Do not turn off the power to stop a software installation procedure. Instead, press Stop(L1)-A. Turn off the power to stop the procedure only if pressing Stop(L1)-A does not stop it. If you are using a terminal as the system console, press Break to stop the software installation procedure.
Caution -
The way you turn off the power depends upon whether your system is working normally or not, as described in the next sections.
See Chapter 6, "Working with Documents," in the Sun System User's Guide for more information about ending a work session and saving your files. If you do not save your work, you could lose it when you switch off the power.
If you are in a windowing environment, exit from it and wait for the system prompt to appear.
At the system prompt, type /usr/bin/su and press Return.
Type your superuser password and press Return.
Type /usr/etc/halt and press Return.
For example, for a system with the hostname nevada and the superuser password welcome, you would type the following:
For additional information about superuser passwords, see Chapter 2, "Becoming a Superuser," in the Sun System and Network Manager's Guide.
When these messages appear, you can safely turn off the power in the proper sequence.
Caution -
If your system does not respond to the mouse or keyboard, end your work session and turn off the power as follows.
If you use a Wyse Technology WY-50
Pressing Stop(L1)-A (or Break) puts the system into the PROM (Programmable Read-Only Memory) monitor command mode.
The monitor command prompt is indicated on the screen either with ok.
Note -
If the system does not respond to the mouse and keyboard, pressing
Stop(L1)-A will not be effective. You may have to turn the power off, wait 10
seconds, and then turn the power on. Try pressing Stop(L1)-A again.
When the ok prompt appears, type boot and press Return.
Wait for the login prompt to return.
At the system prompt, type root and press Return.
Type your superuser password and press Return.
Type /usr/etc/halt and press Return.
For additional information about superuser passwords, see "Becoming a Superuser," Chapter 2 in the Sun System and Network Manager's Guide.
When these messages appear, you can safely turn off the power in the proper sequence.
Caution -
Caution -
If you have turned off the power after using the system, turning the power on again is simple.
Note - If you are powering up your system for the first time, follow the instructions in "Powering Up Your System" either in Chapter 3 (for a networked system) or in Chapter 4 (for a single system).
When the ok prompt appears, type boot and press Return.
Wait for the login prompt to return.
When you see the login prompt, you can log into your system and begin using it again.
For more information about logging in, see Chapter 1, "Entering the Workspace," in the Sun System User's Guide.
You have finished Chapter 5 and have learned:
For SpeakerBox and SunMicropohone performance specifications, read Chapter 6.
