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Pastimes : Computer Learning
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To: Judi Simpson who wrote (73490)12/31/2010 1:35:05 PM
From: PMS Witch1 Recommendation  Read Replies (2) of 110653
 
Image vs Clone. . .

An Image is a copy of your disk (or volume.) It's a file that must be stored somewhere. Common choices: another disk, burn a few DVDs, network storage. . .

A clone is a duplicate of your disk. You'll need two disks: the original and the clone. When done, they're identical.

The word "Identical" is key. A cloned disk has the same drive signature.

If one were to create an image of their disk and restore that image on another disk, the second disk would have identical data but different a signature. Both disks could function in one computer. (New drive letters would be assigned.)

If one were to make a clone of their disk and leave both the original and the clone in their computer, the identical signatures would collide and Windows would refuse to "Mount" one (if lucky) or refuse to boot (if not so lucky.)

Cheers, PW.

P.S. Acronis True Image warns you that you must remove one disk after cloning, but it doesn't explain why.

P.P.S. Windows 7 checks drive signatures before booting. Because of this, Windows 7 may not run from a cloned drive. Windows XP pays no attention to disk signatures; hence, XP will boot from the clone or the original.

P.P.S. The Windows 7 DVD will "fix" things when the clone won't boot. Boot from the DVD and choose Repair instead of Install. Be patient -- it can take 5 minutes.
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