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SubjectRe: lack of raw disk devices
On Tue, Jan 06, 1998 at 02:57:23PM -0500, Adam D. Bradley wrote:

> > Therefore we can't seriously suggest obsoleting raw-device
> > access as long as we can't provide efficient means for
> > continguous file allocation and access with minimum meta-data
> > slowdown. Hmm.. I will think about this...
>
> You may want to try to dig up an old POSIX.4 draft, and read the stuff
> about "real-time files"... they got cut from the standard, but
> provided this kind of functionality. (Gallmeister talks about them a
> little in his book on POSIX.4)

IRIX XFS volumes can contain a realtime part with guaranteed rate i/o.
I'm not aware of any other implementations of realtime i/o on files.

Ralf

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