Date: Mon, 25 May 2009 21:31:56 +0200 From: Dimitry Andric <dimitry@andric.com> To: Freddie Cash <fjwcash@gmail.com> Cc: current@freebsd.org Subject: Re: fdisk incompatibility between major versions Message-ID: <4A1AF22C.7070206@andric.com> In-Reply-To: <b269bc570905251036l3b7534ccjf16dab34b0686e89@mail.gmail.com> References: <4A1AD6D3.7030100@rcn.com> <b269bc570905251036l3b7534ccjf16dab34b0686e89@mail.gmail.com>
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On 2009-05-25 19:36, Freddie Cash wrote: >> So ... I'm guessing the problem in the boot code is corrupted, and if I do >> >> fdisk -B -b <path to -CURRENT boot blocks> da0 >> >> it should put things back to normal. >> However: when I do the second commit I get >> >> fdisk: Geom not found "da0" >> fdsk: failed to write sector 0 > > In order to alter a drive with a mounted filesystem (ie an active > drive), you need to first set the drive to writable: > > sysctl -w kern.geom.debugflags=16 If the original poster is running from a Fixit CD, he could also simply unmount the filesystem before zapping its boot blocks from under it. :) Normally you only need to enable the footshooting^Wdebugflags stuff when you are doing this from the booted system itself, instead of a Fixit or LiveFS disc.
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