Merry Christmas, Happy Holidays and Happy New Year! Never worked with or heard of the scenario you have described. AFAIK (from what I understand about RAC) this is not possible, at least not in Oracle database version 11g. All instances for the given database needs to have access to all tablespaces/datafiles etc. May be it is possible to do so in 12c with pluggable database architecture. Thanks Paresh 416-688-1003 On Thu, Dec 26, 2013 at 2:22 PM, David Barbour <david.barbour1@xxxxxxxxx>wrote: > Merry Christmas (to those of you who celebrate), Happy Holidays (to those > who may not but have something going on - including New Year's), and Good > Afternoon: > > We are currently running a 3-node RAC on RHEL 6.3(version > 2.6.32-279.22.1.el6.x86_64), Oracle 11.2.0.3.0 on ASM. Storage is > fibre-connected EMC VMAX. Cluster cache communication is handled via > Infiband. We are adding a new application and two nodes. The question > arises with the storage. We're putting the new application on a Dell > Compellent SAN. Also fibre connected. The plan is to make the 2 new nodes > the primary nodes for this application, and make node 3 of the current > cluster the fail-over. > > Can anyone who has used multiple different SANs before provide any > hints/tips/tricks/pitfalls? > > Will we have to serve the current EMC Storage to the new nodes? I don't > see why as we're not expanding the number of instances of the currently > running application. But we will have to zone the new storage to connect > to the third node of the current cluster. Any thoughts on how to install > this new application? I don't really want instances of it on Nodes 1 & 2 > at all. If I make Node 3 the master node and install from there, I should > be able to pick Nodes 4 & 5 on which to create the other new instances. > > Any thoughts? >