[NTLUG:Discuss] Splitting mirrors in MD

[Rick Renshaw]

--- Johnie Stafford <jms at pobox.com> wrote:

> 
> I am finally going to upgrade my old RH9 system. I currently have all
> of my filesystems mirrored with md. I'm going to do a fresh install of
> either CentOS or Fedora but I want to split the mirrors before I do
> the upgrade so that I can get to the old filesystems in case I forget
> to back something up that I need. 
> 
> The problem is that I can't figure out how to split the mirrors with
> md. 
> 
> Anybody know how to do it?
> 
> Johnie

Simplest and probably safest way is to shut down the system and remove one of the drives.  Force
the array back on in degraded mode with just the one drive.  The real issue you'll have is when
you try to bring the old drive back into the array.  It might be better to just delete all the
data and add it back to the array as a spare and let it resync.


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