We have a 2 node prototype RAC cluster running on 2 nodes using iscsi and OCFS, ASM. After reboot of the 2 nodes ASM is giving the following error message.
ORA-29760: instance_number parameter not specified
Looking at description for error ORA-2970 we see following
<br />
oerr ora 29760<br />
29760, 00000, "instance_number parameter not specified"<br />
// *Cause: The init.ora file did not contain a value for the instance_number<br />
// which is required to identify this instance to other instances of<br />
// the database running on the same cluster<br />
// *Action: Assign a value to the instance_number parameter in the init.ora<br />
// parameter file<br />
So it looks like the instance_number parameter is not specified. Or it could be that instance is not able to access the correct spfile. Is your ASM spfile on OCFS? If yes, can you check if it can access it.