Re: DAT drive headaches

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On Tue, 2004-12-14 at 20:54, Jon Hill wrote:
> > Is the Tape drive the ONLY device on that SCSI controller?? 
> 
> Yes it is. Its an internal Device. The controller card is supposed to be auto 
> terminating, there is no termination plate on the back of the card. The 
> system also has SATA drives with a Promise SATA on board controller. I have 
> very little knowledge on SCSI, so I could easily have incorrect termination. 
> I am not sure what to check for really.
> 
> Jon
> 
> On Tuesday 14 December 2004 02:55, Wolfgang Gill wrote:
> > On Mon, 13 Dec 2004 16:02:09 +0000, Jon Hill wrote
> >
> > > Hi
> > >
> > > I am running Core 2 with a SCSI Controller INITIO INIC 1060P and HP
> > > DDS-4 C5683A DAT drive. I really want to try and get my backup
> > > routines sorted for Christmas but I am struggling with some errors
> > > when creating TAR archives.
> > >
> > > the result from mt -f /dev/st0 status is
> > > SCSI 2 tape drive:
> > > File number=-1, block number=-1, partition=0.
> > > Tape block size 0 bytes. Density code 0x0 (default).
> > > Soft error count since last status=0
> > > General status bits on (50000):
> > >  DR_OPEN IM_REP_EN
> > >
> > > I am getting a lot of the following error messages.
> > >
> > > tar: /dev/st0: Cannot read: Input/output error
> > > tar: Skipping to next header
> > > tar: Archive contains obsolescent base-64 headers
> > > tar: /dev/st0: Cannot read: Input/output error
> > >
> > > On previous attempts (before I manually set the block size), I was
> > > seeing a lot of these st0: error 70000 (sugg. bt 0x0, driver bt 0x0,
> > > host bt 0x7). inia100:13 0
> > >
> > > Can anyone give me some pointers that might help solve this?
> > >
> > > Thanks,
> > >
> > > Jon
> >
> > Is the Tape drive the ONLY device on that SCSI controller?? If it is shared
> > with the HDD then you will get these type of errors. If it is, then I'd
> > suggest to pop in another SCSI controller, and move the Tape Drive there.
> > That will eliminate those errors. If it's on it's own, then check to see if
> > all the SCSI bus terminators are correctly installed. As that can also
> > cause these types of errors.
> >
> > I had a system here, doing the same thing, putting in another controller
> > solved that problem.

Yes, the SCSI card will auto terminate, BUT the tape drive will also
have to be terminated as well. There's usually one of two ways, that
this is done. Either the drive has a jumper to enable the terminator, OR
you need to have a terminator on the cable it self. If it's external,
you MAY not have to do that, but it's also possible that it wasn't done,
and will need to be checked. As not having the SCSI bus terminated
properly can/will cause read/write errors.

If that is all ok, then it's also possible that it could be the media,
or the drive itself. I'm not sure what else to suggest.

Wolf



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