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Date:	Tue, 20 Aug 2013 22:34:12 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: mt and tar fail on LTO-5 drives
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On Aug 20 16:44, Corinna Vinschen wrote:
> On Aug 20 16:06, bartels wrote:
> > On 08/20/2013 03:32 PM, Corinna Vinschen wrote:
> > >On Aug 20 13:57, bartels wrote:
> > >>)
> > >>
> > >>
> > >>Thanks, I think we can close this one!
> > >Glad to read that.  You could do me a favor, though.  At the moment I
> > >have no tape drive on any Windows machine for testing.  Can you please
> > >test the new `partseek' command in mt 2.4.0 which I announced a couple
> > >of minutes ago and see if it does what it advertises in `man mt'?
> > >
> > >
> >=20
> > Sure. How long does it take to propagate to the mirrors?
> > All I see is 2.3.3.1
>=20
> Depends on the mirror.
>=20
> > And would that be experimental, or current?
>=20
> 2.4.0 is current now.

Never mind.  With a lot of help by my collegues big in virtualization,
I managed to set up a Windows VM with access to the SCSI tape drive in
the host machine.  The partseek command works as advertized, apparently.

However, while testing I found that the mkpartition command didn't work
due to a bug in Cygwin.  So you can use partitioned LTO tapes, but you
can't partition LTO tapes(*) with Cygwin up to and including the current
release 1.7.24.  I fixed that in CVS so that will work with the next
Cygwin release.


Corinna


(*) Actually, what doesn't work is creating two partitions on tape
    drives supporting initiator partitions (like DDS, LTO, SLR).  What
    does work is creating a single partition on such drives, or to
    create one or two partitions on drives only supporting fixed
    partitions (like older SLR).
=20=20=20=20
    This bug is present since 2004 and nobody noticed it.  I guess that
    means there aren't many people out there actually partitioning their
    tape drives...


--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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