Date: Thu, 3 Jul 2014 15:28:01 +0200 From: Maciej Suszko <maciej@suszko.eu> To: Stefan Esser <se@freebsd.org> Cc: freebsd-fs@FreeBSD.org Subject: Re: ccdconfig and Linux mdadm Message-ID: <20140703152801.695a39e6@helium> In-Reply-To: <53B5395B.6040301@freebsd.org> References: <20140703114254.6472055a@helium> <53B5395B.6040301@freebsd.org>
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--Sig_/lqX7EpxMeMLt.RhDezI2/jC Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Thu, 03 Jul 2014 13:07:07 +0200 Stefan Esser <se@freebsd.org> wrote: > Well, you should first check whether the Ext3 file system has been > created with parameters that are compatible with the ext2 driver in > FreeBSD (which has grown some Ext3 extensions, but many are missing). >=20 > But AFAIK, the ext2/3 tools are direct and full ports of the Linux > versions, and they should just work on file systems that the FreeBSD > kernel does not support. ext3 partition created directly on disk is recognized under FreeBSD - simple checking `file -s /dev/ada1s1` and `file -s /dev/sdb1` give similar results. When using ccd - device is seen as data, as there was no filesystem. > OTOH, I'm not sure, whether the parameters to ccdconfig are correct. > A chunk size of 512KB does not match the parameter 512 in ccdconfig, > AFAICT (512 sectors =3D=3D 256KB). But this should not affect reading > the super-block, which ought to be in the first chunk, anyway. Tried setting ileave to 1024, using CCDF_NO_OFFSET - differet combinations but with no luck. > You may want to dump the raw data from the md/ccd device and compare > results under Linux and under FreeBSD. This may give some insight, > why fsck.ext3 does not find a valid super-block ... I dd'ed first 1MB directly from md0 and ccd0 - MD5 checksums are different. > Just my 2ct - I'm not using ccdconfig myself ... Thanks for suggestions. --=20 regards, Maciej Suszko. --Sig_/lqX7EpxMeMLt.RhDezI2/jC Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlO1WmEACgkQCikUk0l7iGosbACgirl0J9WdzZf4dZNlhq+QatNJ VNEAn2byQBjx0ZA5MLsLRcqkMnI6YDE3 =Pc5v -----END PGP SIGNATURE----- --Sig_/lqX7EpxMeMLt.RhDezI2/jC--
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