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mtools: case sensitivity

 
 2.6 Case sensitivity of the VFAT file system
 ============================================
 
 The VFAT file system is able to remember the case of the filenames.
 However, filenames which differ only in case are not allowed to coexist
 in the same directory. For example if you store a file called
 LongFileName on a VFAT file system, mdir shows this file as
 LongFileName, and not as Longfilename. However, if you then try to add
 LongFilename to the same directory, it is refused, because case is
 ignored for clash checks.
 
    The VFAT file system allows to store the case of a filename in the
 attribute byte, if all letters of the filename are the same case, and if
 all letters of the extension are the same case too. Mtools uses this
 information when displaying the files, and also to generate the Unix
 filename when mcopying to a Unix directory. This may have unexpected
 results when applied to files written using an pre-7.0 version of DOS:
 Indeed, the old style filenames map to all upper case. This is different
 from the behavior of the old version of mtools which used to generate
 lower case Unix filenames.
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