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Number   :  227
Date     :  2001-06-17
Author   :  Kan Yabumoto
Subject  :  Re: Re4:  restoring from full CD backup
Size(KB) :  2



Shep:

The SFN-preservation which made DATMAN famous is the
issue for which DirectCD cannot preserve, unfortunately.
You can see the SFN of those files you just mentioned using
the DOS DIR command inside a DOS Box. Do the following:

1. Open a DOS Box (Start > Run... > type command.com).
2. Inside the DOS box, type

DIR E:\yourdir\longfilename.doc

for the file name you observed earlier using Explorer.
(assume E: is the DirectCD volume)

3. Now, drag-and-drop the file to some directory inside
the hard disk (say, C:\temp)

4. Again, from the the DOS Box, view the file

DIR C:\temp\longfilename.doc

---------------

The DIR command will show the SFN to your left and the
LFN to the right. While the LFN are the same, of course
(yes, DirectCD preserves LFN alright as long as the name
is shorter than 64 characters), the SFN for the one
in the DirectCD shows a funny name such as LONG#A42.DOC
whereas its copy you just made in c:\temp will have a
different one such as LONGNA~1.DOC.

The xxxxxx~1.xxx format is the standard format for the
SFN for Win9x (and most NT/2K) files. The trouble is
DirectCD has its own way of assigning the SFN.

When you perform drag and drop, even Explorer does not
do it right. If you have too similar longnames which
shares the same first 6 characters, the order of the
copying (do one at a time) will make the numeric tail
value to be different and this subtle difference is
enough to cause problems for certain key system files.

You can find our more details in

http://www.xxcopy.com/xxcopy/xxcopy03.htm


Kan Yabumoto
========================================================
At 2001-06-17 15:49, Shep Sweeney wrote:
>Dan,
>After reading the responses from various members of
>the
>group, I inserted my CD mirror image of the Windows
>Directory in my CDrom, and went to Explorer and then
>toggled down to the G Drive (my CDrom drive) and
>clicked on it. Windows Directory opened and showed
>all its sub directories. I moved my mouse over the
>Windows\Catroot Subdirectory(Whatever that is) and it
>showed me 3 subdirectories under Catroot each of which
>had a long file name(at least 36 digets). Does this
>not indicate that my CD image contains long file
>names?
> Thanks, Shep



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