How to Force a Crash Dump When the Solaris Operating System is Hung.

This post describes steps for forcing a system crash dump when the Solaris system is in a hang condition. First of all, you need to drop the system into OK Prompt. For Old model which has Sun keyboard, you can press STOP+A, or for newer model / terminal, press break key sequences, example:
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~.
#.
#~
~#

If your console is a terminal, you can type :
“shift-break”    or
“ctrl-break”    or
“ctrl-\” (ctrl-backslash) or
“<enter>” followed by “~” and
“ctrl-break”     on Solaris Sparc,

To send a <BREAK> from Hyperterm, use <Ctrl>-<Pause> or <Alt>-<Pause>
On Hyperterminal, Ctrl-Break
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Okay after you able to drop system to the OK prompt, you will see below PROMPT messages:

Type ‘go’ to resume
ok

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All you need to do is to type ‘sync’ (without the quotes) and press Enter. The system will immediately panic. Now the hang condition has been converted into a panic, so an image of memory can be collected for later analysis. The system will attempt to reboot after the dump is complete.

Ref# Doc ID: 1004506.1