CentOS - Jul 2014 - Shrinking a RAID array

My google-fu appears to be weak today...

I currently have 8*4Tb in a RAID6.

So far I'm only using 6Tb
  PV         VG    Fmt  Attr PSize  PFree  Used 
  /dev/md6   Large lvm2 a--  21.83t 15.37t 6.46t

Let's say I wanted to remove 2 of these disks from the array and
shrink it down to a 6*4Tb

How would I do this?

-- 

rgds
Stephen

On 7/29/2014 5:45 PM, Stephen Harris wrote:
> My google-fu appears to be weak today...
>
> I currently have 8*4Tb in a RAID6.
>
> So far I'm only using 6Tb
>    PV         VG    Fmt  Attr PSize  PFree  Used
>    /dev/md6   Large lvm2 a--  21.83t 15.37t 6.46t
>
> Let's say I wanted to remove 2 of these disks from the array and
> shrink it down to a 6*4Tb
>
> How would I do this?
back it up to external media, rebuild the raid, restore.



-- 
john r pierce                                      37N 122W
somewhere on the middle of the left coast