I've used MOS note #1062983.1 when recreating my ASM diskgroups - I haven't used it lately, but found it to be pretty reliable in the past (11.2.0.2 days). It covers the difference between 11.2.0.1 (crsctl start crs -excl) and 11.2.0.2+ (crsctl start crs -excl -nocrs), and gives the commands to recreate your CRS diskgroup, create a new generic spfile, and get the cluster back up and running. I strongly recommend creating a separate ASM diskgroup for your OCR and voting disks for one reason in particular. On most platforms running RAC/ASM, you will be using external redundancy. When creating OCR/voting disks in ASM on 11.2, the redundancy level of the diskgroup determines how many voting disks are created. External redundancy gets 1 voting disk, normal redundancy gets 3, high redundancy gets 5. It's generally a good idea to build out a small high redundancy diskgroup of 5 LUNs to provide the best protection. The loss of that LUN in external redundancy will take the node down. Losing one LUN in a high redundancy diskgroup will not affect the cluster at all. Andy Colvin Principal Consultant Enkitec andy.colvin@xxxxxxxxxxx http://blog.oracle-ninja.com On Aug 20, 2013, at 2:34 AM, Martin Bach <development@xxxxxxxxxxxxxxxxx> wrote: > Hi Jeremy, > this is an interesting thread. When you have a moment would you compare > your notes against mine? Admittedly I didn't have to recreate the ASM > instance > > http://martincarstenbach.wordpress.com/2011/10/13/the-tale-of-restoring-the-ocr-and-voting-files-on-linux-for-rac-11-2-0-2/ > > Your comment about an ASM spfile backup is noted :) I have spent a > little time yesterday with spget/spcopy in asmcmd and agree that there > are some quirks with it. I believe a possible solution would be to use > spbackup regularly in cron or similar to back the ASM spfile up. If you > ever have to restore you use spcopy with the -u flag to update the gpnp > profile. I found a few notes yesterday that explains the spfile/pfile > steps-it's 1082943.1. > > Martin > -- > Martin Bach > Enkitec (The Exadata Experts) > http://www.enkitec.com > http://martincarstenbach.wordpress.com > > > -- > //www.freelists.org/webpage/oracle-l > > -- //www.freelists.org/webpage/oracle-l