Re: Linear device of two arrays

[Veljko <veljko3@gmail.com>]

On 2017-Jul-23 09:03, NeilBrown wrote:
> The UUID you give to mount is the UUID of the filesystem, not of the
> device (or array) which stores the filesystem.
> 
> One of the problems with use 1.0 metadata (or 0.90) is that the first
> component device looks like it contains the same filesystem as the whole
> array.   I think this is what is causing your confusion.

Yes, I mixed up those two. Now is all clear.

> This all depends on the details of the particular distro you are using.
> You don't, in general, need arrays to be listed in mdadm.conf.  A
> particular distro could require it though.
> 
> If you run
>    mdadm -Es
> 
> It will show a sample mdadm.conf which should contain /dev/md/3 - the
> new raid10, and /dev/md/4.
> You could add those lines to mdadm.conf, then
>    mdadm --assemble /dev/md/3
>    mdadm --assemble /dev/md/4
> and it should get assembled.  Then you should be able to mount the large
> filesystem successfully.

Well, I feel much better now that I do have arrays listed in mdadm.conf
and in /dev.

Thanks very much for your help, Neil!

Regards,
Veljko