IRIS 3030 User Manual

Version 1.0 SERIES 3000
IRIS OWNER’S GUIDE 4-27 Workstation Administration
4.5.1 Recovery Strategies
Accidental changes to the files critical to Un i x operation can prevent the Un i x
operating system from booting. Table 4-4 lists some of the files that are most
likely to cause serious problems.
Critical Files
File Purpose
/
/vmunix
/vmunix1
Root directory
Kernel
Kernel that runs on the second disk
/defaultboot
/dev
/dev/console
/dev/syscon
/dev/systty
/dev/md0a
/dev/rmd0a
/dev/drum
Kernel used by default in booting
Device directory
Console tty device
System console device
System tty device
Root file system device
Raw root file system device
Paging device for virtual memory
/etc
/etc/init
/etc/inittab
/etc/passwd
Miscellaneous file directory
Program that starts other user processes
Table for init
Table of user login names, passwords, and
shells
/bin
/bin/su
/bin/sh
/bin/csh
Commands directory
Used to set environment before execing shell
Bourne shell
C shell
Table 4-4: Files Critical to Un i x Operation
The following subsections describe three procedures for diagnosing the
problem and recovering a system that does not boot:
•Usingtheinitializationprogram,init, to identify the cause of the problem.
•Usingabootablebackuptapetoloadanewrootfilesystemontothedisk.
This procedure deletes any data that was on the root file system of the disk.
•Booting the Un i x kernel from a second disk and reloading the key files.
This approach requires a second disk with a copy of the files needed to boot
the system.

IRIS 3030 Specifications

General

Brand	IRIS
Model	3030
Category	Desktop
Language	English