innochecksum cannot be used on tablespace files that the server already has open. For such files, you should use CHECK TABLE to check tables within the tablespace.
If checksum mismatches are found, you would normally restore the tablespace from backup or start the server and attempt to use mysqldump to make a backup of the tables within the tablespace.
Invoke innochecksum like this:
shell> innochecksum [options] file_name
innochecksum supports the following options. For options that refer to page numbers, the numbers are zero-based.
Print a count of the number of pages in the file.
Debug mode; prints checksums for each page.
End at this page number.
Check only this page number.
Start at this page number.
Verbose mode; print a progress indicator every five seconds.
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