Sun Microsystems Sun Workstation 100U System Manager's Manual page 173

CRASH(8S)
MAINTENANCE COMMANDS CRASH(8S)
NAME
crash - what happens when the system crashes
DESCRIPTION
18
This section explains what happens when the system crashes and how you can analyze crash
dumps.
When the system crashes voluntarily it prints a message of the form
panic: why i gave up the ghost
on the console, takes a dump on a mass storage peripheral, and then invokes an automatic reboot
procedure as described in
reboot(8).
Unless some unexpected inconsistency is encountered in the
state of the file systems due to hardware or software failure the system will then resume multi-
user operations.
The system has a large number of internal consistency checks; if one of these fails, then it will
panic with a very short message indicating which one failed.
The most common cause of system failures is hardware failure, which can re8ect itself in different
ways. Here are the messages which you are likely to encounter, with some hints as to causes.
Left unstated in all cases is the possibility that hardware or software error produced the message
in some unexpected way.
10 err
In
push
hard 10 err In swap
The system encountered an error trying to write to the paging device or an error in read-
ing critical information from a disk drive. You should fix your disk if it is broken or
unreliable.
timeout table overflow
This really shouldn't be a panic, but until we fix up the data structure involved, running
out of entries causes a crash. If this happens, you should make the timeout table bigger.
trap type %d, eode=%d, pe=%x
A:
unexpected trap has occurred within the system; the trap types are:
o
reserved addressing fault
1 privileged instruction fault
2 reserved operand fault
3 bpt instruction fault
4 xfc iDf:truction fault
5 system call trap
6 arithmetic trap
7 ast delivery trap
8 segmentation fault
9 protection fault
10 trace trap
11 compatibility mode fault
12 page fault
13 page table fault
The favorite trap types in system crashes are trap types 8 and 0, indicating a wild refer-
ence. The code is the referenced address, and the
pc
at the time of the fault is printed.
These problems tend to be easy to track down if they are kernel bugs since the processor
stops cold, but random 8akines! seems to cause this sometimes.
Inlt died
The system initialization process has exited. This is bad news, as no new users will then
be able to log in. Rebooting is the only fix, so the system just does it right away.
Last change: 13 August 1983
Sun Release 1.1