why raw devices don't seek above 4GB (sometimes)

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ok,
I found my problem. As previously said, I'm on reiser. Which (obviously)
has a file size limit of 4GB set in the superblock. Llseek only allows
seek offsets which are smaller than the allowed file size. What happens
is:
I set up a raw device: raw /dev/raw/raw1 /dev/hdd
with /dev/hdd being my DVD drive.
Xine then does repeated llseeks on /dev/raw/raw1 until it gets above 4G.
Because /dev/raw/raw1 and the associated /dev/hdd both are on reiserfs,
and reiserfs has a 4G limit, llseek assumes the same for the associated
raw devices and returns from the llseek with EINVAL. Bang. 
I don't know whether there's an easy solution. 
Please contact me if you nee further details/tests

Klaus
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 Klaus Lichtenwalder, Dipl. Inform.,       http://www.webforum.de/Klaus/
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