Below are the steps for moving spfile from file system to ASM diskgroup in RAC.

database name – ORCL
instance_names – ORCL1,ORCL2
oracle DB nodes – dbhstorcl1, dbhstorcl2

1. Check current pfile location:

2. Now required directory in ASM diskgroup(where pfile will be created)

3. Create the spfile from pfile:

4. Update INIT FILE on each node (pointing to actual spfile path)

on node 1(dbhstorcl1)

on node 2(dbhstorcl2)

5. update database config

6. Restart the database

Voilla.