On Fri, 23 Mar 2007, Mattias Wadenstein wrote:

On Fri, 23 Mar 2007, Gordon Henderson wrote:

quoted

Are there any plans in the near future to enable growing RAID-6 arrays by 
adding more disks into them?

I have a 15x500GB - drive unit and I need to add another 15 drives into 
it... Hindsight is telling me that maybe I should have put LVM on top of 
the RAID-6, however, the usable 6TB it yields should have been enough for 
anyone...

Well, if you are doubling the space, you could take this opportunity to put 
lvm on the new disks, move all the data, then put in the old disks as a pv, 
extending the lvm space.

Now why didn't I think of that. *thud*

I really wouldn't recommend having a 30-disk raid6, imagine the rebuild time 
after a failed disk..

There is that - it would give me 2 disks (ie. 1TB) more space though...

This isn't a performance limited server though, it's an off-site backup 
box, so it just has to be reasonably reliable.

Thanks!

Gordon