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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>
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<H4>By James T. Dennis,
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<a href="mailto:linux-questions-only@ssc.com">linux-questions-only@ssc.com</a><BR>
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LinuxCare,
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<A HREF="http://www.linuxcare.com/">http://www.linuxcare.com/</A>
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</H4>
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<H3 align="left"><img src="../../gx/dennis/qbubble.gif"
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height="50" width="60" alt="(?) " border="0"
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>Tape Drive Errors</H3>
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<p><strong>From M Wyn on Thu, 20 Jan 2000
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</strong></p>
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<!-- ::
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Tape Drive Errors
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~~~~~~~~~~~~~~~~~
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:: -->
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<P><STRONG>
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Please also send me a copy of your answer if you
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got one. Many thanks.
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</STRONG></P>
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<P><STRONG><DL><DT>
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Michael Wyn
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</DL></STRONG></P>
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<P><STRONG>
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I've just bought a Dell 1300 server with factory-installed
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RedHat 6.1. The machine was ordered with an internal Seagate DAT
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tape drive. It is a SCSI, DDS-3 24G, STD124000N (3.5")
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internal unit. The <TT>/var/log/dmesg</TT> file identifies the drive:
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"<TT>Detected scsi tape st0 at scsi0, channel 0, id 6, lun 0</TT>".
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</STRONG></P>
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<P><STRONG>
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Issuing command (as root):
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</STRONG></P>
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<P><STRONG><BlockQuote>
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'<TT>mt -f <TT>/dev/st0</TT> status</TT>' with a DAT in, returns
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</BlockQuote></STRONG></P>
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<pre><strong> "SCSI 2 tape drive:
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File number= -1, block number=-1, partition=0
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Tape block size 0 bytes. Ddensity code 0x0 (default).
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Soft error count since last status =0
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General status bits on (10000):
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IM_REP_EN"
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</strong></pre>
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<P><STRONG>
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and the tape access lite blinks indicating error
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reading the tape. Ejected tape then re-inserted it to clear
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the blinking lite then issuing command (as root):
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</STRONG></P>
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<pre><strong> 'mt -f /dev/st0 rewind'
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</strong></pre>
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<P><STRONG>
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returns: "<TT>/dev/st0: Input/output error</TT>"
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</STRONG></P>
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<P><STRONG>
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Doing a '<TT>tar cvf /dev/st0 .</TT>' will return I/O errors. In
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short, the tape drive is not useable.
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</STRONG></P>
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<P><STRONG>
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RedHat folks suggested to install the '<TT>mt-st0.5b-4.i386.rpm</TT>'.
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Issuing '<TT>rpm -iq mt-st</TT>' returns a message saying that it is
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installed. Trying to '<TT>rpm -Uvh mt-st-0.5b-4.i386.rpm</TT>' and got
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the "package installed" message. Tried to de-install using
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'<TT>rpm -e mt-st-0.5b-4.i386.rpm</TT>' and got '<TT>package not installed</TT>'
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</STRONG></P>
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<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
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HEIGHT="28" WIDTH="50" BORDER="0"
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>
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They definitely don't understand your question!
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</BLOCKQUOTE>
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<P><STRONG><IMG SRC="../../gx/dennis/qbub.gif" ALT="(?)"
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HEIGHT="28" WIDTH="50" BORDER="0"
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>
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Dell told me to call <A HREF="http://www.linuxcare.com/">Linuxcare</A>. No answer just yet. Any idea?
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Private email would be highly appreciated. Thanks.
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Michael Wyn
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</STRONG></P>
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<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
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HEIGHT="28" WIDTH="50" BORDER="0"
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>
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Oddly enough I work for Linuxcare.
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</BLOCKQUOTE>
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<BLOCKQUOTE>
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On most 4mm DAT drives the "blinking" LED error
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is an indication that the drive needs to be cleaned.
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I'd run a cleaning tape into the drive and let it
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run.
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</BLOCKQUOTE>
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<BLOCKQUOTE>
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I highly recommend running your data through Lee
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McLoughlin's 'buffer' program. That should be
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included with your distribution or find it at
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Freshmeat (<A HREF="http://www.freshmeat.net"
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>http://www.freshmeat.net</A>) or RPM Find
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(<A HREF="http://www.rpmfind.net"
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>http://www.rpmfind.net</A>). 'buffer' will
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smooth the system's access to the tape drive,
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ensure steady flow and good "streaming." Search
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the back issues of my column for the gory details.
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</BLOCKQUOTE>
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<BLOCKQUOTE>
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Other than that I'd suggest having the drive
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serviced. It wouldn't hurt to upgrade your
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kernel (if you're still running 2.2.5, which
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shipped with the most recent <A HREF="http://www.redhat.com/">Red Hat</A>). However,
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I've never heard of any software/driver problems
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with the Linux st (SCSI tape) drivers.
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</BLOCKQUOTE>
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<!-- sig -->
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<!-- . . . . . . . . . . . . . . . . . . . -->
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<HR WIDTH="40%" ALIGN="center">
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<!-- begin 2 -->
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<H3 align="left"><img src="../../gx/dennis/qbubble.gif"
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height="50" width="60" alt="(?) " border="0"
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>Seagate SCSI tape problem</H3>
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<p><strong>From M Wyn on Fri, 21 Jan 2000
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</strong></p>
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<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
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HEIGHT="28" WIDTH="50" BORDER="0"
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>
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I hate suggesting hardware RMA (return merchandise
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authorization) --- but this does sound very hardware-ish
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</BLOCKQUOTE>
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<P><Strong><IMG SRC="../../gx/dennis/qbub.gif" ALT="(?)"
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HEIGHT="28" WIDTH="50" BORDER="0"
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>Thanks for your note.
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<br>I cleaned the drive using a brand new cleaning tape from Dell.
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No success. Additional info:
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</strong><P>
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<P><Strong>
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when I tried issuing '<TT>mt -f /dev/st0 load</TT>', I got
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"<TT>st0: error with sense data: [valid=0] Info fld=0x0,
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current st09:001 sense key Hardware error. /dev/st0: Input/Output error</TT>"
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</strong></P>
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<P><Strong>
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You may be right that I have a defective tape drive unit (even it
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was received in Dec. 99). Incidentally, I erased a voice message
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from a Dell representative saying that after the unit was shipped,
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they found out that DAT tape drive was not "certified" yet [.. with
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linux 6.1 and Dell 1300 server..].
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</strong></P>
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<P><Strong>
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I'll be contacting them this morning.
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If you have additional comments/suggestions, please email them
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to me.
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</strong></P>
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<P><Strong>
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Sincerely;
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<br>Michael Wyn
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</strong></P>
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<!-- end 2 -->
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<!-- . . . . . . . . . . . . . . . . . . . -->
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<HR WIDTH="40%" ALIGN="center">
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<!-- begin 1 -->
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<H3 align="left"><img src="../../gx/dennis/qbubble.gif"
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height="50" width="60" alt="(?) " border="0"
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>Tape Drive Errors</H3>
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<p><strong>From M Wyn on Sun, 30 Jan 2000
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</strong></p>
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<p><strong>
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Thanks for your note.
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It turns out that the tape driver terminator came loose during shipping.
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Pressed it in firmly (a sweet click was heard!) and the tape is
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running AOK now.
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</strong></p>
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<p><strong>
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Sincerely;
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</strong></p>
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<p><strong>
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Michael Wyn
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</strong></p>
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<!-- end 1 -->
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<P> <hr> <P>
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<H5 align="center"><a href="http://www.linuxgazette.com/copying.html"
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>Copyright ©</a> 2000, James T. Dennis
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<BR>Published in <I>The Linux Gazette</I> Issue 50 February 2000</H5>
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<H6 ALIGN="center">HTML transformation by
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<A HREF="mailto:star@starshine.org">Heather Stern</a> of
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Starshine Technical Services,
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<A HREF="http://www.starshine.org/">http://www.starshine.org/</A>
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</H6>
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