On 11/19/2013 01:01 AM, NeilBrown wrote: > On Mon, 18 Nov 2013 15:13:58 -0800 "David F." <df7729@xxxxxxxxx> wrote: > > >> output of 'mdadm --assemble --scan --no-degraded -v' (mdadm 3.2.6): > ... >> mdadm: no RAID superblock on /dev/sdc2 > > > >> >> 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; Well not quite - you changed that code in commit b31df436 "intel,ddf: don't require partitions when ignore_hw_compat is set". Maybe there's something wrong with that ignore_hw_compat logic? In the strace I don't see indication of test_partition having been called, that's another hint in that direction. Martin > > > 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 -- 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
