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

k.lichtenwalder
2001-04-17T18:53:36Z

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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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