ORA-17635: failure in obtaining physical sector size for ‘+DATA’

Action:

I was trying to create a spfile on asm diskgroup from standby database.

SYS @ shcat > create spfile='+DATA' from pfile='/tmp/initshcat_stby.ora';
create spfile='+DATA' from pfile='/tmp/initshcat_stby.ora'
*
ERROR at line 1:
ORA-17635: failure in obtaining physical sector size for '+DATA'
ORA-12547: TNS:lost contact
ORA-12547: TNS:lost contact

Troubleshooting:

I’ve checked the sector size and it was ok:

SQL> select name,sector_size from v$asm_diskgroup;

NAME       SECTOR_SIZE
---------- ------------
DATA       512

I’ve checked if oracle account was able to see ASM diskgroups in DBCA and it was not. The diskgroup list was empty.

Causes:

There are several causes:

1) File permissions in <Grid_home>/bin/oracle executable not set properly.

2) Oracle user is not a part of asmdba group

Solution: 

1)  Change permissions:

[root@stbycat ~]# chmod 6751 /u01/app/18.3.0/grid/bin/oracle

2)  Add oracle to asmdba group

[root@stbycat ~]# usermod -g oinstall -G oper,dba,asmdba oracle

In my case it was 1st.

My permissions:

$ ll /u01/app/18.3.0/grid/bin/oracle
-rwxr-x--x 1 grid oinstall 413844056 Nov 4 09:14 /u01/app/18.3.0/grid/bin/oracle

Must be:

$ ll /u01/app/18.3.0/grid/bin/oracle
-rwsr-s--x 1 grid oinstall 413844056 Nov 4 08:45 /u01/app/18.3.0/grid/bin/oracle