--On Thursday, October 14, 2004 16:25:01 -0500 Erik Anderson <erikerik AT gmail 
DOT com> wrote:

> On Tue, 12 Oct 2004 18:20:37 -0500, Frank Smith <fsmith AT hoovers DOT com> 
> wrote:
>> Next step would be getting your changer working without Amanda. If you
>> are going to use mtx make sure you can load, unload and move tapes with
>> that before starting on Amanda.
> 
> Hello Frank, and thanks for the advice.  I'm working through the
> Amanda chapter, and it's starting to make more and more sense. In the
> meantime, I'm trying to get my head around mtx.  I've been able to
> successfully load a tape and check the status of the media changer,
> but I'm not able to unload tapes.  I read in the mtx man page that I
> may need to do a "mt offline" before unloading tapes, but whenever I
> do that, I get the following error:
> 
> lpdlnx00 etc # mt -f /dev/sg2 offline
> /dev/sg2: Operation not permitted

I think you're using the wrong device.  The SCSI generic (sg) device
driver has no knowledge of tape commands like rewind and offline.  You
need to use something like /dev/mt0, and need to have scsi tape support
in your kernel (either builtin or a module) or the /dev/mt devices
won't be created.

Frank

> 
> Here's what the changer currently looks like:
> 
> lpdlnx00 etc # mtx -f /dev/sg1 status
>   Storage Changer /dev/sg1:1 Drives, 6 Slots ( 0 Import/Export )
> Data Transfer Element 0:Full (Storage Element 1 Loaded)
>       Storage Element 1:Empty
>       Storage Element 2:Full
>       Storage Element 3:Full
>       Storage Element 4:Full
>       Storage Element 5:Full
>       Storage Element 6:Full
> 
> Any ideas?  Thanks in advance!



-- 
Frank Smith                                      fsmith AT hoovers DOT com
Sr. Systems Administrator                       Voice: 512-374-4673
Hoover's Online                                   Fax: 512-374-4501