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Number   :  5062
Date     :  2003-07-22
Author   :  abrams_jon
Subject  :  Problem with overwriting of the unchanged files with /bi switch
Size(KB) :  0


Seek advice on the following:

I have an internal CD burner and an external CD-Rom drive. Here is 
an excample of a problem that I encounter:

I have a CDRW with 40 files (this is the "original" disk. 
Using "/bi" I back-up these 40 files onto another CD-RW (this is 
the "backup" disk). A few days later, the orignal disk has 45 files: 
40 initial/unchanged, and 5 new. I back up the original disk to the 
backup disk using /bi and /ff, but xxcopy wants to overwrite the 
first 40, although they haven't been changed. I say OK. A few days 
later, the original disk has 53 files: 8 new files and 45 unchanged. 
I repeat the back up operation onto the backup CDRW using /bi /ff 
switches, and again, xxcopy want to overwrite the 45 files already 
stored on the back up but which I have not altered since they were 
backed up.

Please advise: what do I need to do to ensure that xxcopy does not 
touch/replace files that I have not changed ?

Thank you.



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