|Message:||process name (process id) file nameThe log range read from the file “value” at offset value for error code bytes failed verification due to a range checksum mismatch. The read operation will fail with error %7. If this condition persists then please restore the logfile from a previous backup. For more information, click http://www.microsoft.com/contentredirect.asp.|
You may not be able to mount an information store database.
Locate a good copy of the damaged log file. Another copy may exist on either an Exchange online backup or recent server backup.