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<TITLE>The Answer Guy 50: Drivers for SCSI/DAT Tape Drives</TITLE>
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<H4>"The Linux Gazette...<I>making Linux just a little more fun!</I>"</H4>
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<H1><A NAME="answer">
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<font color="#B03060">The Answer Guy</font>
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<BR>
<H4>By James T. Dennis,
<a href="mailto:linux-questions-only@ssc.com">linux-questions-only@ssc.com</a><BR>
LinuxCare,
<A HREF="http://www.linuxcare.com/">http://www.linuxcare.com/</A>
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<H3 align="left"><img src="../../gx/dennis/qbubble.gif"
height="50" width="60" alt="(?) " border="0"
>Drivers for SCSI/DAT Tape Drives</H3>
<p><strong>From Lammon, Dave on Thu, 20 Jan 2000
</strong></p>
<!-- ::
Drivers for SCSI/DAT Tape Drives
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:: -->
<P><STRONG>
Hi,
<br>We are using a Compaq Proliant to do some of our DNS work since NT will
not support the way our reverse delegation is done.
</STRONG></P>
<P><STRONG>
I'm trying to use a shareware tape backup program and the compaq has a
compaq DAT on a scsi channel.
</STRONG></P>
<P><STRONG>
I'm sort of new with Linux and I prbably dont have device support
for the tape drive. Do I use ftape or is there another module to
use for this. I will try compiling a new kernel and see what
options are there. I am using Redhat 6x.
</STRONG></P>
<P><STRONG>
Any help would be apreciated.
</STRONG></P>
<P><STRONG>
Thanks
<br>Dave Lammon
<br>Network Administrator
</STRONG></P>
<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
HEIGHT="28" WIDTH="50" BORDER="0"
>
There should be no special work required to use a
SCSI tape drive under Linux. You access those through
the st driver (the <TT>/dev/st0</TT> node for the first drive
and, <TT>/dev/st1</TT>, etc for other drives).
</BLOCKQUOTE>
<BLOCKQUOTE>
If this is an autochanger you might want to get the
'<tt>mtx</tt>' utility which can be found at its author's web site:
</BLOCKQUOTE>
<BLOCKQUOTE><DL><DT>
Dandelion Digital's Linux Home Page
<DD><A HREF="http://www.dandelion.com/Linux"
>http://www.dandelion.com/Linux</A>
</DL></BLOCKQUOTE>
<BLOCKQUOTE>
... this is like the '<tt>mt</tt>' command but it adds support
for commands like: "next", "previous", etc (and the
<TT>ioctl()</TT>'s to go with them).
</BLOCKQUOTE>
<BLOCKQUOTE>
If you can't access your tape drive, try loading the
<tt>st.o</tt> module. If you've built your own kernel for this
system, go back into your kernel sources, re-run the
make menuconfig (or make xconfigure, or whatever you
like) and make sure that you have the SCSI tape support
compiled in available as a module.
</BLOCKQUOTE>
<BLOCKQUOTE>
Note that using auto-loading support for the tape modules
has been a problem in the past. I highly recommend that
you manually load and unload your <tt>st.o</tt> driver (or build
it statically into your kernel). The problem is that an
autoloaded <tt>st.o</tt> might get auto-unloaded at an inopportune
time (when there's been enough inactivity on the driver.
In those cases, when the driver is re-loaded it will
reset the drive and rewind the tape. This could be bad
if you intended to APPEND new datasets to an existing
tape.
</BLOCKQUOTE>
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<H3 align="left"><img src="../../gx/dennis/qbubble.gif"
height="50" width="60" alt="(?) " border="0"
>DAT</H3>
<p><strong>From Dave Lammon on Fri, 21 Jan 2000
</strong></p>
<p><strong>
Thank You,
<br>this is excellent help, far more than I expected.
I did manage to get the DAT to work with the tape software. I used
<TT>/dev/st0</TT> and it looks like its working.
I greatly appreciate the help.
</strong></p>
<p><em>[
p.s. Dave, turn off the HTML+plaintext option in your mailer. Thanks.
-- Heather. ]</em>
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<P> <hr> <P>
<H5 align="center"><a href="http://www.linuxgazette.com/copying.html"
>Copyright &copy;</a> 2000, James T. Dennis
<BR>Published in <I>The Linux Gazette</I> Issue 50 February 2000</H5>
<H6 ALIGN="center">HTML transformation by
<A HREF="mailto:star@starshine.org">Heather Stern</a> of
Starshine Technical Services,
<A HREF="http://www.starshine.org/">http://www.starshine.org/</A>
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