File Contents Changed After Running Compression Agent

CAUSE

The changed files were created by a program that pre-allocates storage space by creating one large file on the hard disk. When the program needs to write a data file to the hard disk, it overwrites part of the original file with the data from the new file. This method of pre-allocating storage space leads to large areas of undefined disk space that are allocated to the original file. When Compression Agent runs, the contents of these areas may change.