Nanobsd - Freebsd7.2 - Can't enable core dump

[Alex Coulson]

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=-g	
> options 	KDTRACE_HOOKS
> options 	KDB
> options 	DDB
> options	KDB_UNATTENDED
> options	KDB_TRACE


rc.conf
> dumpdev="/dev/da0s1b"
> savecore="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 == 0x4, scsi status == 0x0
> 
> ** DUMP FAILED (ERROR 5) **
> = 0x1d


Any help would be appreciated!

Alex Coulson