Re: Fwd: Raid 5 --grow to fewer, larger drives

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On Sat Jan 03, 2009 at 05:27:49PM -0600, Jeff Rippy wrote:

> I too am looking at this.  My current setup is 4x 500GB drives and I
> want to move to 3x  >=1TB drives.
> My usable space should increase from 1.5TB to >= 2TB with this move if possible.
> 
> I'm fairly new to linux-raid in general but I know you can replace
> drives with bigger ones.  You just can't use their space until all
> drives in the array are of that size.  So I'm thinking of replacing 3
> of the 500's with the 1 TBs.  Then fail and remove the 4th drive
> (assuming enough free space) and somehow forcing a reshape on the
> remaining 3 drives.  Not sure if that is possible but I can't imagine
> why it wouldn't be.  After the resync, finally grow to the new size
> and be done.
> 
> Can someone tell me if this is even possible?  I saw the one reply in
> Nov. to Alex's email but I don't have another machine to swap the
> disks too.
> 
This is currently not possible (though it is on the roadmap for future
work).  For now, the only solution is to set up the new disks as a
separate array and copy the data.

Cheers,
    Robin
-- 
     ___        
    ( ' }     |       Robin Hill        <robin@xxxxxxxxxxxxxxx> |
   / / )      | Little Jim says ....                            |
  // !!       |      "He fallen in de water !!"                 |

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