ORA-00210 ORA-17503: Due to CHOWN

Report at startup

ORA-00210: cannot open the specified control file
ORA-00202: control file: '+ DATA/posdb/controlfile/current.260.822142153'
ORA-17503: ksfdopn: 2 Failed to open file + DATA/sharkdb/controlfile/current.260.822142153
ORA-15001: diskgroup "DATA" does not exist or is not mounted
ORA-15055: unable to connect to ASM instance
ORA-12547: TNS: lost contact

Unable to connect to ASM instance.

For/u01/app/oracle directory/u01/app CHOWN-R oracle: oinstall/u01/app

During installation, the two users, grid oracle, were in different groups.

Solution: Add two users to the group where the other user is located.

Or modify the directory to change the original directory back to the original user's owner.

And modify the S permission of the Directory below

[Root @ camsdb2 bin] # cd/u01/app/11.2.0/grid/bin
[Root @ camsdb2 bin] # ll oracle
-Rwxr-x -- x 1 grid oinstall 184286283 07-05 oracle
[Root @ camsdb2 bin] # chmod 6751 oracle
[Root @ camsdb2 bin] # ll oracle
-Rwsr-s -- x 1 grid oinstall 184286283 07-05 oracle
[Root @ camsdb2 bin] # cd/u01/app/oracle/product/11.2.0/dbhome_1/bin
[Root @ camsdb2 bin] # ll oracle
-R-sr-s -- x 1 oracle asmadmin 210824752 07-06 10:32 oracle
[Root @ camsdb2 bin] # chmod 6751 oracle
[Root @ camsdb2 bin] # ll oracle
-Rwsr-s -- x 1 oracle asmadmin 210824752 07-06 10: 32 oracle