Date: Tue, 6 Jan 2004 19:57:09 +1030 From: Malcolm Kay <malcolm.kay@internode.on.net> To: scott@sremick.net, "Sergey 'DoubleF' Zaharchenko" <doublef@tele-kom.ru> Cc: FreeBSD <freebsd-questions@freebsd.org> Subject: Re: "Cannot find file system superblock" error - how to recover? Message-ID: <200401061957.09291.malcolm.kay@internode.on.net> In-Reply-To: <20040106050827.95860.qmail@web41101.mail.yahoo.com> References: <20040106050827.95860.qmail@web41101.mail.yahoo.com>
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On Tue, 6 Jan 2004 15:38, Scott I. Remick wrote: > --- Sergey 'DoubleF' Zaharchenko <doublef@tele-kom.ru> wrote: > > > I wonder whether editing the label and setting both offsets to 0 > > > might solve the problem. > > > > It definitely seems like that, as the actual offset of the partition = is > > 0, as dd shows. > > Ok, sounds like a plan. Not that I know what I'm doing. Should I use > something like the following command to save my current disklabel? > > bsdlabel /dev/ad6s1c > disklabel.ad6s1c.backup > > Then do I just edit a copy of that textfile, change the offsets to 0, t= hen > write it back like this? > > bsdlabel -R /dev/ad6s1c dislabel.ad6s1c.new > > And lastly... your talk about offsets. The man page for bsdlabel descri= bes > using it on the whole disk (ad6) and not a slice or partition. If I run= it > on ad6, I get: > > bsdlabel: /dev/ad6: no valid label found > Beware; if you write a disklabel (or presumably bsdlabel; I have no exper= ience=20 with 5.x) to ad6 you create a "dangerously dedicated"=20 disk, i.e. a disk without slices. > If I run it on the slice ad6s1 I get: > > # /dev/ad6s1: > 8 partitions: > # size offset fstype [fsize bsize bps/cpg] > c: 156344517 0 unused 0 0 # "raw" part, > don't edit > e: 156344517 0 4.2BSD 2048 16384 89 > > And there I see the offset of 0 you might be talking about...? Are we > looking at the proper label? Just want to make sure before I mess thing= s > up. > Are you saying that the disklabels reported for ad6s1 and ad6s1c are diff= erent? Under FreeBSD 4.x ad6s1 and ad6s1c would normally be aliases referencing = the=20 entire slice. Maybe 5.x is different! I'm now very confused. What is reported by fdisk? Malcolm Kay > Thanks!
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