-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello Neil, Here is the result, I think I managed to reproduce it as it has converted the raid0 to raid4. so commands in sequence: mdadm --verbose --create /dev/md/mdtest --level=0 --raid-devices=2 --metadata=1.2 /dev/loop0 /dev/loop1 mdadm: chunk size defaults to 512K mdadm: array /dev/md/mdtest started. strace -o /tmp/foo -f mdadm --grow /dev/md/mdtest --raid-devices=3 --add /dev/loop2 mdadm: level of /dev/md/mdtest changed to raid4 mdadm: /dev/loop2 not large enough to join array mdadm: Need to backup 3072K of critical section.. mdadm: /dev/md/mdtest: Cannot grow - need a spare or backup-file to backup critical section mdadm: aborting level change The 3 devices are equal sizes, all 200MB in size: - -rw-r--r-- 1 root root 209715200 Feb 14 11:28 raid_device1.loopback - -rw-r--r-- 1 root root 209715200 Feb 14 11:28 raid_device2.loopback - -rw-r--r-- 1 root root 209715200 Feb 14 11:17 raid_device3.loopback Output of mdadm -E : http://pastebin.com/WBhgP4L5 Contents of /tmp/foo: http://pastebin.com/jcietEaa Let me know if you need any more information to debug this. Thanks, - -Nik On 02/13/2012 12:07 AM, NeilBrown wrote: > On Fri, 10 Feb 2012 16:10:09 +0200 Nikolay Kichukov <hijacker@xxxxxxxxx> > wrote: > >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 > >> Hi Neil, >> Do you think it will make sense to try to replicate using loop devices? > > It certainly won't hurt. It might not achieve anything though. > Give it a try ... it you manage to reproduce, let me know. > > Thanks, > NeilBrown -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJPOizCAAoJEDFLYVOGGjgXylEIAK0JwigUO+E+L0GqdlYoU/N8 5zdEBZ+0yu0VjsyKPAhOTz5g9348lNRPFyuQkOlGoDm3T06WxAbgo/Hh1kS2Q4IT sWjw2w9NQI6qE0sRJPZS7Xie57M/dLVvNGUcLGvYCYTqXZQlAZbMf0tr8BCg8A6F ddkvagi+QPyQg9NQultRhHwt10Ed6D2J1NFbnpoytoJy+27lwGfom1hmGKdtLVZG 2ZRoGtzk2yhomF8qgY4xujClZSaF7HaZc1eJ0FDDoUvQfEHEtjImSd/BbwAiUpsH zv8aNn2Gik5v1RAHq8eOCg148J/XY/4RVD05zKj7fQqnphiwZGdirSKWv9YQCN0= =VwH2 -----END PGP SIGNATURE----- -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
