From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: MDADM 3.3 broken? Date: Tue, 19 Nov 2013 11:01:10 +1100 Message-ID: <20131119110110.396b2af3@notabene.brown> References: <528A7721.8080604@arcor.de> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/WnPsjiUu6JIqLe/ipLq/fEk"; protocol="application/pgp-signature" Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: "David F." Cc: Martin Wilck , linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/WnPsjiUu6JIqLe/ipLq/fEk Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Mon, 18 Nov 2013 15:13:58 -0800 "David F." wrote: > output of 'mdadm --assemble --scan --no-degraded -v' (mdadm 3.2.6): ... > mdadm: no RAID superblock on /dev/sdc2 >=20 > output1 of 'mdadm --assemble --scan --no-degraded -v' (mdadm 3.3 - > note using /dev/sdc2, not /dev/sdc): ..... > mdadm: /dev/sdc2 is identified as a member of /dev/md/imsm0, slot -1. So there is the problem. mdadm 3.2.6 sees no RAID superblock on sdc2, while mdadm 3.3 does (but should not). However that code hasn't changed! load_super_imsm() still starts with: if (test_partition(fd)) /* IMSM not allowed on partitions */ return 1; and test_partition hasn't changed since it was written in April 2010 for mdadm 3.1.3. So I'm quite perplexed. Is your mdadm-3.3 compiled from source or provided by a distro? Can you run the "mdadm --assemble" under strace and post the result? strace -o /tmp/some-file mdadm --assemble --scan ...... Thanks, NeilBrown --Sig_/WnPsjiUu6JIqLe/ipLq/fEk Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) iQIVAwUBUoqqRjnsnt1WYoG5AQLvsg//Z0itgPBm1i7z//NMsta9NwBA3ZDBhRn7 e7DA5QXvXtSrhC5Yin/HTI0VloC23OB6Vn/y+dzRjd4V0H2fX50YFMGzHWTz6cMI Sya/6oXDrka3vg8lM5tRtoAVsCsulTbUHpGc9u+hClbqDA5d72Yk7c0iSMH8gP9R sEy01VOPodti6ro2R2Moz6v11gAI7rniScoOVppSMANc2WMIVQHTSIIjJ3euczXe A3+LksiF9P85k6EOnor5h7Rsk3suPxc4eeDdhSK59NxEAYDJ1GCvRea+sHzXBHwe jBgSWNkmIYVnBKlApQInDKXRydyh5kWQA3duTaoKmafr9vDQLPzogFCugrjqGekp 1Lrlf29/GTlYvPzdy+KT5QWOOCABPy/XC5YDIeYTuZPvP+pUMUlWfI0LeZIF57a5 nZhEXB6hTGYDSRJZ6RoIcMs7iBgd3IayNrcF/zdmPs8Mzxx8s5McyDfmGg5ykoXC NDXb+5r1Wapfg8kcaciNV+z1QL6UXunNTGAHnkd2OJQOOqA3uIee1atRdE9al1aK 4wqNLVWJdKlipQ8P4Bq64CUl4uATFfPB5SEHXHKffQprG9vGtsLCmEX5FYwX2CCp ob1qa3f+j5kHdMrqgYtqCZTqQ2Lfw81bGvbVpo/KKmCltfDufZ8lVORcd8Xk8d1z m8WtfWESWCU= =tm6K -----END PGP SIGNATURE----- --Sig_/WnPsjiUu6JIqLe/ipLq/fEk--