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Why Can't "diskcopy" Be Used For Cloning Non-floppy Devices?


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#1 Guest_hollowface_*

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Posted 10 January 2015 - 03:56 PM

On Windows there is a command called "diskcopy" for copying one floppy to another.

diskcopy A: B: /v

My understanding is that this is a sector based cloning tool, and so it should work for floppies, hard drives, ssds, and even cds/dvds. Yet, various sources on the net, including Microsoft, say that it can ONLY be used for copying floppy devices, and CANNOT be used for cloning hard drives. However no one ever explains why.



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#2 Platypus

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Posted 10 January 2015 - 04:43 PM

Two likely reasons come to my mind.

 

It's an old DOS command, hence is a 16 bit application, and will be written using 16 bit variables (holders of numeric values). Since it's specifically written to copy floppy disks, there will have been no reason to enable it to handle capacities beyond the number of sectors used by the largest capacity floppy disks, 2.88 MB

 

Also, it works with the FDD controller, which cannot access hard disk drives or optical media.


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#3 Guest_hollowface_*

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Posted 11 January 2015 - 05:13 PM

Finally, my curiosity is satisfied. Thanks Platypus.






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