As 3040C should use software base disk ownership anyway, there is no need to change cabling at all. Just remove disk ownership from spares on one head and add them to another head.
If you have single path connection this will add you additional benefit of distributing IO over two controllers :)
С уважением / With best regards / Mit freundlichen Grüβen
--- Andrey Borzenkov Senior system engineer
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Peta Spies Sent: Monday, April 21, 2008 2:25 PM To: toasters@mathworks.com Subject: Balanced clusters?
Hi,
We normally build our clusters as per (what I believe is) best practice, with equal number of identical shelves on each loop. However, we've hit an emergency situation where a currently unused (and not in the aggr) shelf on one head would really really really be much more useful on the other, to grow a very full volume on there.
Due to the nature of the problem, just presenting a new volume from this shelf is not a good enough fix; I need to grow the existing volume. Asap.
So how bad of an idea would it be to wire that shelf into the other head? Will the cluster complain? The cluster in question is a 3040C, and we'll end up with 3 sata shelves on one head and 1 on the other.
Peta