[CentOS] *very* ugly mdadm issue

[Lamar Owen]

On 09/04/2014 01:35 PM, Les Mikesell wrote:
> On Thu, Sep 4, 2014 at 9:59 AM, Lamar Owen <lowen at pari.edu> wrote:
>> .. (The 1.2 superblock
>> goes 4K in from the first sector; prior to 1.1 the superblock went to the
>> last sector of the drive).
> Does that mean autodetection/assembly would be possible with 1.2 but
> not 1.1?  I've always considered that to be one of the best features
> of software raid.

Don't know.  Try it and let us know.....

>
>> Of course, ext4 at least for block group 0 skips the first 1k bytes.....
> How does this mesh with the ability to mount a RAID1 member as a
> normal non-raid partition?   I've done that for data recovery but
> never knew if it was safe to write that way.
>
Good question; try it and let us know.  I have never tried it.