port-alpha: Re: AS1200 with 53c875 symbios SCSI card, does not boot

Subject: Re: AS1200 with 53c875 symbios SCSI card, does not boot
To: Stephen M Jones <smj@cirr.com>
From: Michael Carlson <mcarlson@Legato.COM>
List: port-alpha
Date: 10/09/2001 11:16:19
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Thats my exact situation. The onboard controller which is a 50pin scsi 
is i believe a 53c810, and the dual channel PCI scsi card is a 53c875. 
Both apprearently do not work and my only other option is to buy another 
controller. Any other controller suggestions?

Thanks,
Mike C

Stephen M Jones wrote:

>>I have a AlphaServer 1200 with a 53c875 NCR/sym SCSI controller that 
>>times out during booting off the install CD.
>>
>
>Michael
>
>I had a similar problem with my 5305 (the AS1200).  Are you saying that
>the onboard controller is timing out? That is normally where the CDROM
>drive is attached to.  Check Manuel's suggestion regarding termination.
>
>The device I had was a 53c875 based controller .. I basically could not
>use it.  It was a dual channel SCSI adapter and during the booting of
>the system, the bus would reset and time out.  I tried a number of
>configurations but couldn't get beyond the timeout.  There are varying
>clock speeds I found if you checkout the NCR driver code .. and I was
>just suspecting that was the issue with that particular card.. the
>drive attempts to guess the clockspeed.
>
>SO, my solution was to stop using the device and just go out and buy
>a TEKRAM (53c875) controller.. I believe the designation is 950? or
>950UA .. I could be wrong.. but that is what I had to do for both of
>my 5305s.
>
>Stephen
>
>



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Thats my exact situation. The onboard controller which is a 50pin scsi is
i believe a 53c810, and the dual channel PCI scsi card is a 53c875. Both
apprearently do not work and my only other option is to buy another controller.
Any other controller suggestions?<br>
<br>
Thanks,<br>
Mike C<br>
<br>
Stephen M Jones wrote:<br>
<blockquote type="cite" cite="mid:200110091729.f99HT5E23138@egsner.cirr.com">
  <blockquote type="cite">
    <pre wrap="">I have a AlphaServer 1200 with a 53c875 NCR/sym SCSI controller that <br>times out during booting off the install CD.<br></pre>
    </blockquote>
    <pre wrap=""><!----><br>Michael<br><br>I had a similar problem with my 5305 (the AS1200).  Are you saying that<br>the onboard controller is timing out? That is normally where the CDROM<br>drive is attached to.  Check Manuel's suggestion regarding termination.<br><br>The device I had was a 53c875 based controller .. I basically could not<br>use it.  It was a dual channel SCSI adapter and during the booting of<br>the system, the bus would reset and time out.  I tried a number of<br>configurations but couldn't get beyond the timeout.  There are varying<br>clock speeds I found if you checkout the NCR driver code .. and I was<br>just suspecting that was the issue with that particular card.. the<br>drive attempts to guess the clockspeed.<br><br>SO, my solution was to stop using the device and just go out and buy<br>a TEKRAM (53c875) controller.. I believe the designation is 950? or<br>950UA .. I could be wrong.. but that is what I had to do for both of<br>my 5305s.<br><br>Step
hen<br><br><br></pre>
    </blockquote>
    <br>
    <br>
    </body>
    </html>

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