>>>>> On Thu, 7 Jul 2011 15:27:22 -0400, Paul Mather said:
>
> On Jul 7, 2011, at 2:13 PM, Martin Simmons wrote:
>
> >>>>>> On Thu, 7 Jul 2011 10:30:36 -0600, James Woodward said:
> >>
> >> Hello,
> >>
> >> I haven't seen anything about using nsa devices to use over something like
> >> an sa device. I did a bit of a search but haven't seen anything that really
> >> explains that portion to me.
> >
> > http://www.bacula.org/5.0.x-manuals/en/main/main/Storage_Daemon_Configuratio.html#SECTION002030000000000000000
> > http://www.bacula.org/5.0.x-manuals/en/problems/problems/Testing_Your_Tape_Drive.html#SECTION00413000000000000000
> >
> > Also, all of the examples use non-rewind devices.
> >
> >
> >> When I set these up I did see a recommendation to use the pass through
> >> devices e.g pass0, pass1, pass2, pass3. I don't remember the specifics but
> >> the passthrough devices themselves seemed to be problematic.
> >
> > Yes, the passthrough devices shouldn't be used for data transfer. They
> > should
> > be used to control an autochanger robot.
>
>
> Normally, under FreeBSD, you will have a ch device for your autoloader, which
> you should use instead. E.g.,
>
> tape# camcontrol devlist
> <QUANTUM ULTRIUM 4 2210> at scbus0 target 8 lun 0 (sa0,pass0)
> <QUANTUM UHDL 0075> at scbus0 target 8 lun 1 (ch0,pass1)
> [[...]]
>
>
> The chio command uses /dev/ch0 by default.
I stand corrected.
OTOH, the mtx command is documented to use the passthrough device. Is that
wrong?
__Martin
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