Re: SCSI tape problem

[Stefan Hensen <hensen%wpos4.physik.uni-wuppertal.de@localhost>]

On Fri, 17 Apr 1998, Michael L. Hitch wrote:

> Ignatios Souvatzis <ignatios%theory.cs.uni-bonn.de@localhost> writes: 
> > Stefan Hensen wrote:
> > 
> > >   st0: bad request, must be between 33925 and 16777215
> > 
> > Hm... looks like the tape can only use variable block sizes in certain 
> > ranges.
> 
>   The block limits seem rather strange - I'd suspect they are probably
> garbage.  The buffer for the block limits doesn't appear to be cleared
> and the actual length of the data returned doesn't appear to be checked,
> so it's possible that those values are garbage left on the stack.  More
> likely, the buffer is not on a long word boundary and is six bytes long,
> and I suspect the driver is not getting the DMA data transferred properly.

Although I don't know much about driver internals, that sounds to me like
a possible explanation for all of my other observations concerning the 
SCSI tape usage (see my previous message).

Regards,

Stefan Hensen

----------------------------------------------------------
Stefan Hensen
e-mail: hensen%wpos4.physik.uni-wuppertal.de@localhost