(Fwd) Re: SCSI tape data loss

[Nate Lawson]

On Wed, 27 Aug 2003, Dan Langille wrote:
> On 27 Aug 2003 at 11:06, Nate Lawson wrote:
> > Here is a response I got by forwarding this to the pthreads maintainer:
> > > A return status of 0 from write is not interpreted as an End-Of-Tape.
> > > The threads library isn't smart enough to know that the file
> > > is a tape device and that a 0 status should break it out of the
> > > loop.  Thus, it continues writing.
> > >
> > > Use libkse :-)
> > >
> > > --
> > > Dan Eischen
>
> Nate: thanks for getting in touch with him.
>
> It is interesting to note that the code works OK on Linux and
> Solaris.  Why is FreeBSD different in this case?

I don't know.  Our pthreads implementation is purely userland so it's
likely that it is difficult to differentiate a non-blocking read from an
EOF.

> Kern: I can't comment on libkse.  I don't know it and I don't know
> what effect it would have on Bacula.

libkse is a drop-in replacement for libpthreads.  Unfortunately, it's only
on 5.x.

-Nate