Async negotiation (Was: 2.0.36/5.1.4 and BIOS settings)

[Randy Gobbel]

On 12-Dec-98 at 01:22, Doug Ledford (dledford at redhat.com) wrote:
> Dirk Lutzebaeck wrote:
> > 
> > Doug Ledford writes:
> >  > drive in question.  If that FAQ says to always use async mode
> >  > regardless of the make or model of drive then they need to bite me. 
> >  > There are lots of DAT drives out there that work great at sync speeds. 
> >  > HP and SONY tend to run forever sync.  If Seagate DATs have a problem
> >  > in specific then that's another matter, but last I knew, Seagate only
> >  > says to disable sync negotiation on the model ST8000N drives or
> >  > something like that.  It's a 
> > 
> > Doug, I was wrong to say "all drives". This is from "System Lockup or
> > Freezing problems when running the tape backup" of the Seagate site: (1)
> > 
> >   "Synchronous Negotiation should be disabled for all Python
> >    tape drives. Leave Synchronous Negotiation enabled for the
> >    Peregrine or Scorpion tape drives."

I haven't been following this thread, but just happened to see this one
message.  I went through a very similar hassle with my Seagate (Conner) CTT8000
TR4 tape drive some months ago.  I called both Seagate and Adaptec tech
support, as I recall they both told me the tape should be async, and they were
both wrong.  The tape gets set up in synchronous mode and works perfectly.  It
does *not* work correctly if I force async mode.  As Doug says, it seems most
likely that there's something wrong with the application.  I have yet to find a
Unix backup utility that I really like, having been spoiled by Retrospect on
the Mac.

-Randy


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