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Date: Mon, 25 Mar 1996 12:15:40 +0200 (EET)
From: Seppo Kallio <kallio@cc.jyu.fi>
To: Gene W Homicki <gwh@spiders.com>
cc: freebsd-hardware@FreeBSD.org, freebsd-scsi@FreeBSD.org
Subject: Re: HP C1553A autochanger.
In-Reply-To: <199603241905.OAA18062@charlotte.spiders.com>
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I am trying to use same device with amanda + 2.1R. I have one sh script from 
Peter Dufault <dufault@hda.com>. It is using the scsi-command.

It can be used to change the tape randomly. It wokrs even with amanda in 
2.2-960303 snap but not in 2.1R. In 2.1R mt -f /dev/nrst0 rewind command 
after scsi-slot selection command cause all next slot commands to fail. 
This can be solved by giving 1-2 extra slot selection commands selecting 
the same slot.

#!/bin/sh
#From dufault@hda.comThu Feb 29 10:04:36 1996
#Date: Fri, 26 Jan 1996 18:48:44 -0500 (EST)
#From: Peter Dufault <dufault@hda.com>
#To: Seppo Kallio <kallio@beeblebrox.pccc.jyu.fi>
#Cc: questions@freebsd.org, hardware@freebsd.org,
#    kallio@beeblebrox.pccc.jyu.fi
#Subject: Re: HP C1553A Autoloading DDS-2 DAT tape drive control?#
#
#> 
#> 
#> Hi, we have HP C1553A Autoloading DDS2 DAT tape drives attached to 
#> a FreeBSD node. Is there a program available  that would allow me to 
#> fully manipulate the drive?
#> 
#> I have code for HPUX and Solaris, but it is so OS dependend I cannot 
#> compile it in FreeBSD.#
#
#You can use scsi(8) to send commands to the device.  Something like
#this (I didn't run this - this is a dramatization based on that C
#code) saved as dds_changer and made executable.  As a raw-device-name
#you must use something that accepts the SCSI ioctl calls - the
#control device for whatever it comes on line as will.
#

PATH="/sbin:/usr/sbin:/bin:/usr/bin"; export PATH

usage()
{
        echo "(/dev/rst0 for reading/writing, /dev/st0ctl.0 for command)"
        echo "Usage: dds_changer [123456ne] raw-device-name (/dev/st0ctl.0)"
        echo "1..6 = Select cartridge"
        echo "n = next cartridge"
        echo "e = eject magazine"
        exit 2
}

if [ $# -ne 2 ] ; then
    usage
fi

cdb3=0
cdb4=0
cdb5=0

case $1 in
     [123456])
       cdb3=$1
       cdb4=1
       ;;
     n)
       ;;
     e)
       cdb5=0x80
       ;;
     ?)
       usage
       ;;
esac

scsi -f $2 -s 100 -c "1b 0 0 v v v" $cdb3 $cdb4 $cdb5



On Sun, 24 Mar 1996, Gene W Homicki wrote:

> Hey all,
> 
> 	I have an HP C1553A DDS-2 6 Tape autolaoder/changer.  In the
> docs for the drive, it specifies that that it can ork in changer mode,
> which "SCSI Medium Changer" commands can be sent.  
> 
> When the machine boots up, its recognized as a SCSI tape drive, but
> not as a changer device (I have the ch driver compiled into the kernel
> and I'm running 2.1R).  
> 
> The drive works just fine in "stacker" mode, but I'd be much much
> happier if I could randomly access cartridges.  If anyone has
> experience with these drives and/or can give me a pointer to docs to
> get it working, I'd appreciate it.
> 
> 
> 						--Gene
> 
> -- 
> Gene W. Homicki                               gwh@spiders.com
> Objective Consulting, Inc.                    http://www.spiders.com/
> Internet Presence Design                      voice: +1 914.353.3511
>