Date: Tue, 3 Apr 2007 01:19:18 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Antony Mawer <fbsd-fs@mawer.org> Cc: freebsd-fs@freebsd.org Subject: Re: gjournal error Message-ID: <20070402231918.GI34180@garage.freebsd.pl> In-Reply-To: <461185C6.3040801@mawer.org> References: <b37cb0970703300454l75eae76dyc75c1be5e31f65@mail.gmail.com> <20070330181015.GB11360@garage.freebsd.pl> <b37cb0970704020235vf3171f0g8227002607972342@mail.gmail.com> <20070402161220.GA34180@garage.freebsd.pl> <461185C6.3040801@mawer.org>
next in thread | previous in thread | raw e-mail | index | archive | help
[-- Attachment #1 --] On Tue, Apr 03, 2007 at 08:37:58AM +1000, Antony Mawer wrote: > On 3/04/2007 2:12 AM, Pawel Jakub Dawidek wrote: > >On Mon, Apr 02, 2007 at 12:35:10PM +0300, Dan Cojocar wrote: > ... > >>Here it is: > >>bsdlabel /dev/ad1s1 > >> 12:32:40 > >># /dev/ad1s1: > >>8 partitions: > >># size offset fstype [fsize bsize bps/cpg] > >> c: 234440625 0 unused 0 0 # "raw" part, > >>don't edit > >> d: 20971520 0 4.2BSD 2048 16384 28552 > >> e: 213469105 20971520 4.2BSD 2048 16384 28552 > >'d' partition is wrong, it should start at offset 16. You get EPERM > >(error=1) when someone tries to write to first 16 sectors where metadata > >is stored. > > This point relates to a recent thread on -questions, where we were discussing the offset of 16 and whether it was still relevant. The issue arose because disklabel cannot > compute the "hog partition" when using an offset of 16 -- it (incorrectly) assumes the starting offset is is 0, and as a result the last partition goes past the end of the > disk. > > http://docs.freebsd.org/cgi/getmsg.cgi?fetch=1660728+0+archive/2007/freebsd-questions/20070401.freebsd-questions > > What sort of meta-data is typically stored in these first 16 sectors? [...] Partition table stored by bsdlabel(8). > It sounds to me like disklabel needs to be modified in how it treats a "*" in the size field: on the 'c' partition, continue to use the full size of the device; if used on > any others, it needs to take into account the offset of the first non-'c' partition... > > Does this sound right? If so, I may have a go at writing a patch at some point. 'bsdlabel -w' works correctly. The biggest issue is that sysinstall(8) creates bogus partitions that start at offset 0. -- Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFGEY91ForvXbEpPzQRAk0RAKDaS3/zgbx8w4TdqjiG4OAPp/BLvwCgwUkN NtbMNu/BuQxOQuGIPtdbNfc= =a+gz -----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20070402231918.GI34180>