If you are working on RHEL, then to use the disk in ASM diskgroup, the disks need to be labeled with ASM. Earlier oracleasm utility was used for this purpose. But oracle developed its own ASM filter d...

Recently we found that, one of our asm instance was using a different spfile. So used below steps to change the spfile. existing spfile – > /u01/app/grid/dbs/asmbackup.ora new spfile      ...