The end result of this operation will be logically equivalent
to that of the Full Volume Backup (described above),
In both cases, the contents of the Target Volume should become
the same as those of the Source Volume.
The difference between the two is that the Incremental
Volume Backup tries to reduce the work by identifying
and skipping the files that have not been modified since
the most recent backup operation whereas the Full Volume Backup
always copies everything.
In each directory in the Target Volume, XXCLONE scans
the contents for any extra file or directory whose counterpart
does not exist in the Source Volume. All such files and
directories will be deleted from the Target Volume.
Then, the directory in the Source Volume will be scanned for
files that need to be copied to the corresponding directory
in the Target Volume. All new files that do not exist
in the Target will be unconditionally copied. If the
same file exists in the Target Volume with identical size,
timestamp and file-attributes, then, the file will be skipped.
Otherwise, the file is considered modified since the previous
backup and will be copied.
The process continues recursively for each directory found
in the Source Volume. At the end, the Target Volume
will be made logically equivalent to the Source Volume in
There may be cases where the copy operation fails for various
reasons. We will discuss this topic in
the Failures in File Copy section.
After the entire volume is duplicated in the above mentioned
fashion, the files that make up the system registry will be
In most Windows systems, the vast majority of files
in a volume remain unchanged in most day-to-day
operations. Therefore, an incremental backup
operation dramatically reduces the time it take to
perform a volume clone operation.
In conjunction with this mode of volume cloning, the
HyperSync option increases
the performence significantly.
This is the preferred operation for a periodic backup
Note: the XXCLONE Freeware does not support this feature.