oracle data block corrupted (file#4,block#38459)
data file 4:'d:\mcqt\data\indx1mcqt.odb)
preceding 2 lines from mcqt_db
ora-01115: io error reading block from file 4(block # 18225)
ora-01110: data file 4:'d:\mcht\data\indx1mcht.odb'
ora-09206:sfrfb:error reading from file
osd-04006: readfile() failure,unable to read from file
ORA-01111 name for data file string is unknown - rename to correct file
Cause: The datafile was missing from a CREATE CONTROLFILE command or BACKUP CONTROLFILE RECOVERY was done with a control file that was saved before the file was created.
Action: Rename the MISSING file to the name of the real file.
ORA-01115 IO error reading block from file string (block # string)
Cause: The device on which the file resides is probably off line.
Action: Restore access to the device, then retry the operation.
ORA-09206 sfrfb: error reading from file
Cause: File may have been truncated or corrupted.
Action: See OSD error accompanying this message.