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[JPTTEST <j-p-t@xxxxxxx>]

This is a joke?!
I give the cp850 parameter so the fs driver can do the mapping.
This clearly is the fs driver's job.
vfat maps correctly, and is using the same kernel.

I'll ask on the mailing list. Let's see if they can help 
http://vger.kernel.org/vger-lists.html#util-linux

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https://bugs.launchpad.net/bugs/1405684

Title:
  mount: codepage mapping does not work for msdos fs

Status in linux package in Ubuntu:
  Triaged

Bug description:
  I want to mount a DOS 5.0 partition without messing it up with LFNs.

  According to docs this only works if I use the MSDOS fs instead of
  VFAT.

  But using MSDOS fails converting non ASCII chars.

  If I mount this way:
  mount -t vfat  -o check=strict,codepage=850,iocharset=iso8859-1,utf8
  everything is fine:
  ÄÄÄÄÄÄÄÄÄÄ  AßLAR   ÄÜÖßÄÜÖ   istdaskürzer  nochlänger
  ABC         ÄÜÖÄÜÖ  äüößÄÜÖ2  longfilename  öööööööööö

  If I mount using MSDOS
  mount -t msdos -o check=strict,codepage=850
  the chars aren't translated at all:
  ls shows garbage:
  ??????  ?????  ??????~1  ??????~1  ?????2  abc  a?lar  istdas~1  longfi~1  nochl?~1

  if piped through less, you can see it delivers the cp850 codes.

  <8E><9A><99><8E><9A><99>
  <8E><9A><99><U+139A><99>
  <99><99><99><99><99><99>~1
  <8E><8E><8E><8E><8E><8E>~1
  <8E><9A><99><U+139A><99>2
  abc
  a<E1>lar
  istdas~1
  longfi~1
  nochl<8E>~1

  Writing filenames directly writes UTF8 codes on the disk (I believe,
  not verified)

  thanks

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