On Wed, Mar 07, 2007 at 09:50:12AM +0800, ?? ???? wrote:
> I have two i386 architecture machines  kernel is NetBSD-2.0.2
> 
> They are run in DHCP and IPF services Then they run the few days or more.
> Appear  
> Panic:m-copydata
> 	Stopped at netbsd : cpu_Debugger+0x04 : leave
> 
> It??s into the db> prompt
> 
> 
> Help  someone!

panicing in copydata is usually a sign of a flipped bit in RAM.  (I have
run into this on occation.)

adding

ddb.onpanic=0

to /etc/sysctl.conf will reboot the machine when it panics instead of
going to the debugger.

Running a memory tester on your machine (memtest86+) for a day or two
would be a good idea.

-- 
  Aaron J. Grier | "Not your ordinary poofy goof." | agrier@poofygoof.com
              "silly brewer, saaz are for pils!"  --  virt