Technical data

Fault Isolation 4-25

To run the TSC diagnostics, follow Procedure 4-4.

Procedure 4-4. Running the TSC Diagnostics

1. Log out and stop any user processes.

2. Shut down to the MD prompt by typing the following at the “login:” prompt:

3. At the MD prompt “ > “, type the following:

> re < RETURN >

4. After the beeper sounds, press < RETURN > and type the following:

> ex tsc < RETURN >

end of procedure

4.4 The sysboot Program

The sysboot program is a standalone program that boots programs from disk, including

the operating system and the diagnostics described in this chapter.

NOTICE:

Diskless nodes execute a slightly different boot program,

called netboot, that boots the operating system across the net-

work. Use ctboot to boot from a cartridge tape drive.

The sysboot program uses the screen to display errors. These errors can occur when

the MD encounters problems while trying to locate or read the /sau12 directory on the

system’s Winchester disk, or on another boot device speciﬁed as the load device.

If you encounter sysboot errors, follow the troubleshooting procedure shown previ

ously in Figure 4-8.