From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Samuel Subject: Re: A bug with multiple devices? Date: Thu, 1 Jan 2009 11:52:37 +1100 Message-ID: <200901011152.43405.chris@csamuel.org> References: <49597D06.1050806@cn.fujitsu.com> <2c3b11250812301717q7d54a8cdt6417d32468ea2eee@mail.gmail.com> <495ACE31.3050209@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1563067.qgIHiRCJgj"; protocol="application/pgp-signature"; micalg=pgp-sha1 To: linux-btrfs@vger.kernel.org Return-path: In-Reply-To: <495ACE31.3050209@cn.fujitsu.com> List-ID: --nextPart1563067.qgIHiRCJgj Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Wed, 31 Dec 2008 12:43:13 pm Shen Feng wrote: > The problem still exists with -d option. As Chris Mason wrote in response to my query on this it's a known issue tha= t's=20 a consequence of different chunks potentially having different RAID levels. The RAID level itself does appear to work - I tested it by copying a kernel= =20 image onto it, unmounted it, used debug-tree to work out the offset for it = on=20 one device of the RAID and blew a section away with dd. I remounted it and= =20 verified that the MD5 checksums still agreed with the original and there we= re=20 kernel messages complaining about checksum mismatches showing that the dama= ge=20 had been detected and worked around. cheers, Chris =2D-=20 Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC This email may come with a PGP signature as a file. Do not panic. =46or more info see: http://en.wikipedia.org/wiki/OpenPGP --nextPart1563067.qgIHiRCJgj Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iQEVAwUASVwT241yjaOTJg85AQKRsQgAkUxXsw3m+AqTUMyUWnPuI2PZfmOSm9sL duZxgrbXYne3P+bMtu1R7A9dM9meERqauGuW5uK5I1rRHdfeyETlIFOKwHbMtbg+ 7470HYpDFsLVVwbJ+/WqlUd6l74Dcd2TNWtr7nh9QkLQxUJag7fj08EjTgEKWODA bQIPo1Ni9ejRNYmiIxHl8lGUWZpNuHgcREBfdMU/qkv9yuRqOr/70oZA3XEpr7uE SoAX2I4pXvqlNKuhvVxmLUZFpxJlrmdE5H/s2UFp0nSd9ny6g3fqGBUqE4XmYhuV s2S8J4Nzn8ql69dNNjNE+DSdN1NN3uZI+NatR6qLfl2GUMIQML6VIA== =FKDg -----END PGP SIGNATURE----- --nextPart1563067.qgIHiRCJgj--