Date: Sat, 15 Sep 2012 06:24:32 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: Yuri <yuri@rawbw.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Why fdisk can't open root disk with MBR for writing? Message-ID: <alpine.BSF.2.00.1209150620130.40275@wonkity.com> In-Reply-To: <50541103.6050608@rawbw.com> References: <5053C9A1.3030605@rawbw.com> <alpine.BSF.2.00.1209142016200.36584@wonkity.com> <50541103.6050608@rawbw.com>
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On Fri, 14 Sep 2012, Yuri wrote: > On 09/14/2012 19:23, Warren Block wrote: >> Did you actually try gpart? GEOM prevents writes to providers that are in >> use, but gpart should handle it correctly if the problem is just that fdisk >> doesn't understand GEOM. >> >> # gpart set -a active -i 1 ada0 >> >> If that fails, the provider is in use, usually mounted. The safety can be >> disabled, but it's better to figure out what has it in use. > > Yes it is the hard drive with mounted /. But changing the active slice should > be safe in any case. > gpart worked. > This safety feature is protecting people from themselves. Sounds very > familiar. gpart allowed it, so it's not the safety feature but merely that fdisk is aging and can't deal well with GEOM.help
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