Subject: Re: NCR Driver Problems
To: Christoph Badura <>
From: Stefan Esser <>
List: current-users
Date: 01/26/1996 14:37:59
On Jan 26,  2:47, Christoph Badura wrote:
} Subject: Re: NCR Driver Problems
} Stefan Esser writes:
} >On Jan 24,  2:10, Christoph Badura wrote:
} >} Stefan Esser wrote:
} >} >It is well possible, that it fully supports tags. 
} >} >It is just picky about non-tagged commands (even
}     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
} >} >NOP commands) sent when any tagged command is 
}     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
} >} >active.
}     ^^^^^^
} >} I figure the problem isn't with the generic SCSI code but with your
} >} driver violating the standard.
} >The GENERIC SCSI code issues the start unit command,
} >and the driver sends it to the drive. It includes a 
} >simple tag message, if tags are in use on this drive.
} Now, why then would you suggest that the reason that someone's drive
} doesn't work with your driver is that your driver sends an untagged
} start unit command?  I don't see how anyone could interpret your
} previous message differently.  In fact, your messages says that your
} driver violates the SCSI standard in sending untagged commands when
} tagged commands are in the targets queue.  I, naively, assumed that
} you would know what your driver is doing.

I've answered this in private mail,
and do not intend to write any public
response, since Christoph appears not
to have the slightest idea of what has
been the issue in this thread.

Now I'll go back and try to find out 
what how to make things going ...

Regards, STefan
 Stefan Esser, Zentrum fuer Paralleles Rechnen		Tel:	+49 221 4706021
 Universitaet zu Koeln, Weyertal 80, 50931 Koeln	FAX:	+49 221 4705160
 ==============================================================================			  <se@ZPR.Uni-Koeln.DE>