Very early versions of DOS used to reallocate previously used space even
if previously unused (and therefore contiguous) space was available.
I'm pressing my memory here but I think that was gone by DOS 3 and maybe
even DOS 2. Therefore the only way you can get a fragmented drive even
in DOS is to have used all of the free space at one time and been forced
to use space that had previously been allocated and then freed. If you
have a large drive that you've never filled you should never have a
fragmentation problem even in DOS let alone Windows NT or later. NT and
later have much smarter allocation and re-allocation algorithms.
These old fragmentation rumors only go back about 27 years. Old rumors
die hard.
Chuck Norcutt
On 8/14/2012 3:22 PM, Mike Lazzari wrote:
> Defraggler or Windows defrag work fine but don't make much difference.
> My C: drive occasionally gets fragmented so I run a defrag if Windows
> says it needs it. Archival drives never do.
>
> Never run a defrag on an SSD nor try to format one either for that matter.
>
> Mike
>
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