[4966] in linux-scsi channel archive
Re: Problems with NCR875
daemon@ATHENA.MIT.EDU (Luca Palazzo (IW9EXL))
Thu Oct 22 08:57:58 1998
Date: Thu, 22 Oct 1998 13:59:40 +0200 (GMT+0200)
From: "Luca Palazzo (IW9EXL)" <lpala@genius.cdc.unict.it>
To: Gerard Roudier <groudier@club-internet.fr>
cc: linux-scsi@vger.rutgers.edu
In-Reply-To: <Pine.LNX.3.95.981021230650.1062A-100000@localhost>
On Wed, 21 Oct 1998, Gerard Roudier wrote:
>
> On Wed, 21 Oct 1998, Luca Palazzo (IW9EXL) wrote:
>
> > Hallo everyone,
> > i've a problem whith ncr8xx driver...
> > I'm using an ASUS PCI-SC875 card. I've connected a Plextor Ultraplex and an
> > Hitachi DK326C-10 to 50 pins channel, a Quantum Viking II to the ultrawide
> > channel. The termination is on the Plextor.
> > I've also connected to the ultrawide ch an HP 6020i CDR (with temination) that
> > is in an external box. When this is connected i receive these messages:
>
> I understand the following:
>
- Viking II connected to the 68 pins internal connector.
- DK326C-10 connected to the 50 pins internal connector (+Ultraplex)
- HP 6020i connected to the 68 pins external connector.
There an error
- Viking II + HP6020i connected to 68 pins internal connector (the HP is
in a external box connected by an external cable, but to the same 68 pin
internal connector)
>
> If it would be so, then your SCSI BUS would be not correct, since you can
> only use at most 2 connectors at a time and not 3. This may seem to work,
> depending on devices being used, but this is very broken.
>
> > ncr53c875-0: SCSI parity error detected: SCR1=1 DBC=19000000 SSTAT1=f9
> > scsi : aborting command due to timeout : pid 2261, scsi0, channel 0, id 1,
> >
> > and i'm not able to use none of two CDs. When HP is not connected everything
> > works really fine. This problem appeared when i changed my Plextor 12Plex
> > with Ultraplex; everything worked fine with 12plex.
> > I've tried to disconnect the Ultraplex and leave connected only two HDs and
> > HP and everything works fine. The problems are only when i connect HP and
> > Plextor.
> > The parity is ON on every device....
> > The driver is 3.0g, kernel 2.1.119 or 123, and 3.0i with 2.1.125.
>
> Use preferently 3.0i or newer.
>
> > I don't know what i can do... I've tried near everything...
>
If i change the ultraplex with an 12plex, everything works fine...
I think there would be some problem when the driver finds two cds that
have negotiated different speeds. When Ultraplex (Fast-20) and HP
(Fast-10) are connected ==> no work. IF 12Plex (Fast-10) and HP (Fast-10)
==> OK.
Thanks in advance...
Luca
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