Date: Mon, 8 Mar 2010 09:31:32 +0200 From: Jonathan McKeown <j.mckeown@ru.ac.za> To: freebsd-questions@freebsd.org Subject: Re: Booting MFS from Secondary Partition Message-ID: <201003080931.32157.j.mckeown@ru.ac.za> In-Reply-To: <201003061302.o26D2KBN003070@dc.cis.okstate.edu> References: <201003061302.o26D2KBN003070@dc.cis.okstate.edu>
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On Saturday 06 March 2010 15:02:20 Martin McCormick wrote: > Fbsd1 writes: > > just dd the image to what ever drive you want > > That is the goal. The challenge is to launch a script > that detects when the boot device has been unmounted as dd will > not work on an active file system. Martin it may or may not work, but there's a sysctl for the geom subsystem which might do what you want. sysctl kern.geom.debugflags=16 This used to be used (for all i know still can be) to allow writing metadata for (eg) building a gmirror on a mounted disk - it's often referred to as the ``allow-footshooting'' flag. That might allow you to dd your image onto the mounted disk - i'd either try it with a handy spare system or wait for someone more expert than i to comment, though. Jonathan
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