Re: unable to assemble (mostly?) clean array

[Adam Goryachev <adam@websitemanagers.com.au>]

On 09/12/13 10:32, Christopher Hoover wrote:
> hi folks,
>
> what's the safest way to get this array back into r/o mode?
>
> thanks,
> -ch
> ch@murgatroid.com
>
>
> ch@snaggle:~$ sudo mdadm --examine /dev/sd[defg]1 | egrep 'Event|^/dev/sd'
>
> /dev/sdd1:
>
>           Events : 286024
>
> /dev/sde1:
>
>           Events : 286011
>
> /dev/sdf1:
>
>           Events : 286024
>
> /dev/sdg1:
>
>           Events : 286024
>
> ch@snaggle:~$ sudo mdadm --assemble --force  /dev/md0 /dev/sdd1
> /dev/sde1 /sdg1
>
> mdadm: cannot open device /sdg1: No such file or directory
>
> mdadm: /sdg1 has no superblock - assembly aborted
>

I'm no expert on this, but two questions:
Did you mean /dev/sdg1 ?

Why not use sdd1, sdf1 and sdg1 since they have the correct event counts?
Then add sde1 and allow to resync?

sudo mdadm --manage /dev/md0 --stop
sudo mdadm --assemble  /dev/md0 /dev/sd[dfg]1
sudo mdadm --manage /dev/md0 --run

Try that, and provide any output


PS, it seems you would only need a minimum of 2 drives, and you have 
three with matching event counts, so it should be fine.

Regards,
Adam

-- 
Adam Goryachev
Website Managers
P: +61 2 8304 0000                    adam@websitemanagers.com.au
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