Re: Import data from an array coming from another computer

[Aleh Suprunovich <a.suprunovich@sam-solutions.com>]

On Thu, Jun 06, 2013 at 06:00:44PM +0300, Nicolas Michel wrote:
> It is better but it still doesn't work:
> $ mdadm --assemble /dev/md1 --run /dev/sdc1
> mdadm: failed to RUN_ARRAY /dev/md1: Input/output error
> mdadm: Not enough devices to start the array.
> 

One device should be enough to start RAID1 array. But here is something I missed
in your first message:

On Thu, Jun 06, 2013 at 05:47:33PM +0300, Nicolas Michel wrote:
> ############################################################
> # $ mdadm --examine /dev/sdc1
> # /dev/sdc1:
> #           Magic : a92b4efc
> #         Version : 0.90.00
> #            UUID : 76fc436c:be43bed5:f0f41dd6:3e9e1b96
> #   Creation Time : Fri Jun  8 04:21:19 2012
> #     Raid Level : raid1
> #   Used Dev Size : 20980800 (20.01 GiB 21.48 GB)
> #     Array Size : 20980800 (20.01 GiB 21.48 GB)
> #   Raid Devices : 2
> #   Total Devices : 2
> #  Preferred Minor : 0
> #
> #    Update Time : Thu May 23 14:55:13 2013
> #          State : clean
> #  Active Devices : 1
> #  Working Devices : 2
> #  Failed Devices : 0
> #   Spare Devices : 1
> #        Checksum : b0ae04f1 - correct
> #          Events : 28935
> #
> #
> #       Number   Major   Minor   RaidDevice State
> # this     2       8        1        2      spare   /dev/sda1
> #
> #    0     0       0        0        0      removed
> #    1     1       8       17        1      active sync   /dev/sdb1
> #    2     2       8        1        2      spare   /dev/sda1
> ############################################################

Line starting from 'this' indicate that device you have was spare component of
array, so no information restore is possible with this disk. Do you have acess
to other drive, named /dev/sdb1 in your mdadm --examine output?