Date: Thu, 26 Feb 2009 11:21:05 -0700 From: Tim Judd <tajudd@gmail.com> To: "Michael W. Lucas" <mwlucas@blackhelicopters.org> Cc: questions@freebsd.org Subject: Re: "disklabel: Class not found" when editing USB disk Message-ID: <ade45ae90902261021g59fdb639jb9ddc90ac6d3bba7@mail.gmail.com> In-Reply-To: <20090226173016.GA69357@bewilderbeast.blackhelicopters.org> References: <20090226173016.GA69357@bewilderbeast.blackhelicopters.org>
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Canonical way to boot FreeBSD by hand, with no tools. Using one slice, one partition fdisk -BI /dev/da0 bsdlabel -Bw /dev/da0s1 newfs /dev/da0s1a Making sure there's a /boot directory with the all important loader Making sure /boot/kernel/kernel exists This should boot -- however is pretty pointless without anything else. init's needed, and everything else to make a full MUM (Multi User Mode) environment... Keep note that not only does the MBR need bootable code, so does the bsdlabel/disklabel newfs will set the proper fstype in the bsdlabel if it's partition is 'a' Good luck... and yes, I top posted. (Deal with it, people who don't like it...) On Thu, Feb 26, 2009 at 10:30 AM, Michael W. Lucas < mwlucas@blackhelicopters.org> wrote: > Hi, > > I'm following Ceri's instructions for getting FreeBSD on a flash > drive. My laptop is a Feb 1 -current, I'm installing FreeBSD 7.1, and > the instructions are for 6.1, so we have all kinds of things that > could be going wrong. > > The USB boots with the error: > > F1 FreeBSD > F6 PXE > Boot: F1 > > Not ufs > Not ufs > No /boot/loader > > When I investigated the flash's disklabel, I saw: > > 8 partitions: > # size offset fstype [fsize bsize bps/cpg] > a: 4000106 16 unused 0 0 > c: 4000122 0 unused 0 0 # "raw" part, don't > edit > > I newfs'd this flash drive and put data on it. The obvious thing to > do is set the disklabel for partition a to 4.2BSD. Even if I have to > reinstall the data, no big deal. > > So, run bsdlabel -e /dev/da0s1 and change the disklabel to: > > # size offset fstype [fsize bsize bps/cpg] > a: 4000106 16 4.2BSD 0 0 > c: 4000122 0 unused 0 0 # "raw" part, don't > edit > > Then I get the error: > > bsdlabel: Class not found > re-edit the label? [y]: > > The same error appears if I try to edit the disklabel off-disk and > restore (-R). > > Google tells me that this error is not uncommon, but the only > solutions I saw (loading geom_mbr and setting kern.geom.debugflags=16) > did not help. > > Anyone have any suggestions? Or, can anyone tell me I'm running down > the wrong path? > > Thanks, > ==ml > > -- > Michael W. Lucas mwlucas@BlackHelicopters.org, mwlucas@FreeBSD.org > http://www.BlackHelicopters.org/~mwlucas/<http://www.BlackHelicopters.org/%7Emwlucas/>; > Latest book: Cisco Routers for the Desperate, 2nd Edition > http://www.CiscoRoutersForTheDesperate.com/ > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" >
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