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Number   :  70
Date     :  2001-05-17
Author   :  Kan Yabumoto
Subject  :  Re: xxcopy switches, etc.
Size(KB) :  2



At 2001-05-17 08:19, Joseph Maddison wrote:
>Okay, I'm not sure that my understanding here is complete, or maybe it's
>just completely wrong!
>
>I'll back up to observable facts. I've used Explorer to move directory
>trees around. Occasionally,
>when moving or copying a tree to an entirely new location, it says
>something along the lines of: File already exists, do you wish to
>overwrite? Say what? There was *nothing* where I was copying to (verified).
>It is somehow creating its own collision.
>
>I've explored this situation and it seems to happen when files are copied
>in an order that is not alphabetical on LFN/SFN. What I think is happening
>is that Explorer moved/copied the TechSpec2 (TECHSP~2) to the new directory
>first and gave it the SFN (TECHSP~1), next, it tries to copy TECHSP~1 from
>the original dir and asks if it can overwrite. Is this right? Could you
>explain what is happening here and explain if I would get into a similar
>situation with /NX0?

From your description, I assume that in your system, you observe
a file named "TECHSP~1". The fact you observe this is already a
sign that the directory has been manipulated by a file-copy utility
in DOS or a utility which does not support LFN. Otherwise, you
would not get a fliename like XXXXXX~1 except for the SFN of a
real LFN which is non-8.3 format. So, when you spot such thing,
you should correct it as soon as possible, else funny things start
to happen. Again, it's not XXCOPY which did this in the first place
and /NX or /NX0 does not contribute or correct the situation.

I remember, Joseph, you are using Windows 2000. In that case,
to observe the SFN which is attached to a file with LFN is not
as easy as in Win9x because the DIR command would not give you
both LFN and SFN. You can use

XXCOPY /LDZSL \src to display both SFN and LFN

Hope this command helps you examine both the LFN and SFN so that
you can experiment with the file system behaviors with regard to
the LFN/SFN aspects. It's really a quarky system.


Kan Yabumoto

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