I am using oracle 10g express edition. Database server was running fine but suddenly I got this error from alert file and I don't have any db backup. Infact this server was not so important so that's why no backup configure but now they required some data from very important tables. I would really thankful if you share your input to fix this issues
Sat May 02 00:28:24 2020
ALTER DATABASE MOUNT
Sat May 02 00:28:24 2020
ORA-00202: control file: 'D:\ORACLE\DATABASE\ORADATA\XE\CONTROL.DBF'
OSD-04001: invalid logical block size (OS 1128350276)
ORA-27047: unable to read the header block of file