Date: Mon, 6 Dec 2010 08:37:19 +0800 From: Yue Wu <vanopen@gmail.com> To: David Wolfskill <david@catwhisker.org> Cc: freebsd-stable@freebsd.org Subject: Re: boot0cfg -B can't work Message-ID: <20101206003719.GA26050@fbsd.t60.cpu> In-Reply-To: <20101206002924.GE1480@albert.catwhisker.org> References: <20101206002620.GA1286@bsd.hasee.cpu> <20101206002924.GE1480@albert.catwhisker.org>
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On Sun, Dec 05, 2010 at 04:29:24PM -0800, David Wolfskill wrote: > From boot0cfg(8): > > NOTE > Protection mechanisms in the geom(4) subsystem might prevent boot0cfg > from being able to update the MBR on a mounted disk. Instructions for > temporarily disabling these protection mechanisms can be found in the > geom(4) manpage. Specifically, do a > > sysctl kern.geom.debugflags=0x10 > > to allow writing to the MBR, and restore it to 0 afterwards. > Thanks, I remembered that boot0cfg in the previous version can do it without changing the sysctl parameter, maybe it's changed in newer version. -- Regards, Yue Wu Key Laboratory of Modern Chinese Medicines Department of Traditional Chinese Medicine China Pharmaceutical University No.24, Tongjia Xiang Street, Nanjing 210009, Chinahome | help
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