From owner-freebsd-hackers@FreeBSD.ORG  Fri Sep 17 12:39:46 2010
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From: Alex Coulson <alex.coulson@charthouse.co.uk>
Date: Fri, 17 Sep 2010 13:15:47 +0100
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Subject: Nanobsd - Freebsd7.2 - Can't enable core dump
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I have a soekris net4801 running nanobsd which is freezing randomly =
(between 10min->2hours), and does not create a crash dump file when it =
fails (and nothing interesting in the messages log).

The following kernel options are enabled:
> makeoptions	DEBUG=3D-g=09
> options 	KDTRACE_HOOKS
> options 	KDB
> options 	DDB
> options	KDB_UNATTENDED
> options	KDB_TRACE


rc.conf
> dumpdev=3D"/dev/da0s1b"
> savecore=3D"YES"


swapinfo
> Device          1K-blocks     Used    Avail Capacity
> /dev/da0s1b        500720        0   500720     0%


db> call doadump
> Physical memory: 247 MB
> Dumping 35 MB:ucom0: ucomreadcb: TIMEOUT
> Aborting dump due to I/O error.
> status =3D=3D 0x4, scsi status =3D=3D 0x0
>=20
> ** DUMP FAILED (ERROR 5) **
> =3D 0x1d


Any help would be appreciated!

Alex Coulson