11-19-2008
as jiliagre says, take a look at dumpadm. this will show you where your dump device and your savecore directory are.
if your system has crashed, your dumps are most likely in /var/crash/`uname -n` . in there you should see two files such as unix.0 and vmcore.0. if you have a service contract with sun, these files along with an explorer file are usually tar'd and zipped up to sun for analysis.
also, you can force a dump with savecore -L . however, you will need a dedicated dump device (not swap) to do this. the easiest way around this is create a file the same size as your swap and change the dump device path to point to this file. run savecore -L and you get your dump. however, it will NOT show any relevant information to why your system has crash as all of memory has been purged when the system reset.
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CRASH(8) BSD System Manager's Manual CRASH(8)
NAME
crash -- examine and debug system images
SYNOPSIS
crash [-M core] [-N kernel]
DESCRIPTION
The crash command is used to examine and debug system images.
If run without any arguments, crash operates on the running system.
The options are as follows:
-M core Operate on the specified crash dump instead of the default /dev/mem. Crash dumps should be from the same version of the system
and same machine architecture as the running version of crash, and must be uncompressed.
-N kernel Extract the name list from the specified kernel instead of the default /dev/ksyms.
The command syntax used by crash is the same as the in-kernel debugger. See the ddb(4) manual page for more information.
Operations and facilities that require a running system, such as breakpoints, are not supported by crash.
crash does not provide pagination. However, by using the pipe symbol, output may be sent to commands available from the shell. For example:
crash> ps | more
crash> ps | grep ioflush
SEE ALSO
ps(1), vmstat(1), ddb(4), pstat(8)
HISTORY
The crash command appeared in NetBSD 6.0.
BSD
March 7, 2009 BSD