Booting from a Disk or Other Device

Booting from a Disk or Other Device

To tell the Command Monitor to load standalone commands from various resources (such as a disk or CD-ROM device), set the path environment variable. (See "Changing Environment Variables".) Set the path variable as follows:

setenv path "device_name alternate_path"

For example, issue the following command:

setenv path "dkip(0)disk(0)partition(8)bootp()/altdir/altbootfile"

This causes the Command Monitor to boot the file dkip(0)disk(0)part(8)altbootfile. If that file fails, the Command Monitor boots bootp()/altdir/altbootfile. If that file also fails, the Command Monitor prints the message ''command not found''. Note that pathnames are separated with spaces. If the device specification is contained within a command or by bootfile, the Command Monitor ignores path. Only bootp or volume headers are understood by the PROM.

Chapter 11 describes the process by which you can improve your system performance. Your system comes configured to run as fast as possible under most circumstances. However, if your use of the system is out of the ordinary, you may find that adjusting certain parameters and operating system values may improve your total performance, or you may wish to optimize your system for some feature, such as disk access, to better make use of the graphics features or your application software. Topics described in this chapter include:

Measuring system performance.
Improving general system performance.
Tuning for specific hardware and software configurations.

Chapter 11