I have question regarding adding diskgroup. Let’s say if we add any diskgroup with normal redundancy without using failgroup it will create diskgroup. So, how redundancy is maintained. Where would it write block image on same disk.
When you don’t define failgroup while creating normal redundancy diskgroup, oracle would automatically create diskgroup for you. Run following query to identify this
select name,path,failgroup,header_status from V$ASM_DISKGROUP;