Hello Marc,

On 3 Jun 1999, Marc SCHAEFER wrote:
> Mr. James W. Laferriere <[EMAIL PROTECTED]> wrote:
> >     a general user can get 'mt' to get status (...) once the
> >     tape is loaded .  But using 'mtx' on the same device
> >     illicits the below response .
> Question 1:
>    - are you operating a medium changer ?  A medium changer is a device
>      which can automatically load, remove and choose from different
>      cassettes.
>      if no: well, why are you using mtx, then ?

        Yes.
 
> Question 2:
>    - if you answered YES to the first question, are you 100% sure that
>      your tape device has LUN (Logical Unit) 0 as the tape drive, and
>      1 as the changer ?  (if you don't know, look in the debug messages,
>      or do a scsi-probe/probe-scsi/sprobe/whatever from PROM monitor
>      after clean shutdown).

        Yes, Did the 'probe-scsi-all' thing to verify .

> If you do not have such changer, you need other software. I have software
> for Solaris, including full source, which can be used to control a
> SCSI ID-based autochanger (such as the DILOG Libra series, from
> the company I work for, thank you for reading this subliminal
> advertising :)). 

> Look at http://www-internal.alphanet.ch/archives/local/autochangers/plt/
> this works under Linux (through sg) and Solaris (see README.Solaris)

> > mtx: Request Sense: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > mtx: READ ELEMENT STATUS Command Failed
> Presumably there is no LUN 1.

        root can get to it , the same command that produced the above
        as user gives appropriate info . Ie:

sunny:root:/$ mtx -f /dev/rmt/0 inquiry
Vendor ID: 'HP      ', Product ID: 'C1557A          ', Revision: 'U709'

                Tia, JimL
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       | James   W.   Laferriere | System   Techniques | Give me VMS     |
       | Network        Engineer | 25416       22nd So |   Give me Linux |
       | [EMAIL PROTECTED] | DesMoines  WA 98198 |     only on AXP |
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