I tired NetBSD 1.6 BETA4 on my PowerMac 7300/180.

but after some hours, (disconnected all terminal)
when I tried to connect NetBSD via serial console
I get db> prompt and I must type continue to run.

What is db> ? is that kernel debug mode?
is that a message of "sleeping mode?"

I want NetBSD to run as a server (DB, WEB, Samba).
and with db> message all server are went down.

How can I run NetBSD without any ttys/console connected?
Because, sometimes PC connected with serial line
must be shut down, with other workstation running.

What log file should I examine?

If any documents related about this,
please let me know.

My setting:
NetBSD 1.6 BETA4
with sys.src.tgz kernel patched 
dmesg: 
NetBSD 1.6D (MACBSD_GEN) #0: Wed Jul 24 03:05:54 KST 2002
    bubux@macbsd:/usr/src/sys/arch/macppc/compile/MACBSD_GEN
total memory = 144 MB
avail memory = 123 MB
using 1868 buffers containing 7472 KB of memory

because I am using Sonnet Tempo ATA-100 Card.
(my SCSI HDD is all broken, and SCSI HDD is too expensive in korea)

I just configured kernel like faq (to setting boot device manually).

I didn't patched open firmware (except real-base, load-base),
because I am using it via serial-console on my Windows PC.
(Original console doesn't support Hangul but virtual terminal
with Netterm I can write hangul).