You can detect and repair damaged SCCS files using the admin command.
admin -h s.file1 s.file2 ...
OR
admin -h directory1 directory2 ...
If the admin command finds a file where the computed checksum is not equal to the checksum listed in the SCCS file header, it displays this message:
ERROR [s.filename]: 1255-057 The file is damaged. (co6)
Note: Using the admin command with the -z flag on a damaged file can prevent future detection of the damage.
admin -z s.file1