ORA-00204 ORA-00202 ORA-27091 ORA-27072

# Control file header/ block corrupted 

ORA-00204: error in reading (block 3, # blocks 8) of control file
ORA-00202: control file: '/u01/app/oracle/xxxx/xxxx/control02.ctl'
ORA-27091: unable to queue I/O
ORA-27072: File I/O error
Linux Error: 92: Protocol not available
Additional information: 4
Additional information: 3
Additional information: 4096

- Solution 

1. Delete -  /u01/app/oracle/xxxx/xxxx/control02.ctl

2. Copy & paste  control01.ctl to control02.ctl same location then try to startup mount db.

Resolved the issue Happy Keep enjoy..!!!!!!