Kernel crash before dumpon

Wojciech Puchar wojtek at
Tue Nov 25 10:45:09 PST 2008

> The page includes the following suggestion on how I might be able to
> proceed:
>        Alternatively, the dump device can be hard-coded via the
>        dump clause in the config(5) line of a kernel configuration
>        file. This approach is deprecated and should be used only
>        if a kernel is crashing before dumpon(8) can be executed.
> I tried adding
>        config dump "/dev/ad4s3b"
> to the configuration file but that option appears to be no longer
> supported: the config command gives an error message of:
>        root/dump/swap specification obsolete
> Is the paragraph above obsolete?  If so, what's the preferred way to
> collect the dump?
> Thanks
in rc.conf


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