[Info-vax] DEC Multia (UDB) issues

[Richard B. Gilbert]

On 8/22/2011 11:24 AM, Stafford Winters wrote:
> On 8/22/2011 7:21 AM, MG wrote:
>> Generally speaking: Are SCSI failures common? I recently tried to
>> directly boot an OpenVMS Alpha V8.3 installation CD, in an RRD43 and
>> also a Yamaha SCSI CD-R/RW drive later (which was properly detected
>> in the SRM), but I'm getting SCSI bus errors.
> I'd look at SCSI bus length and termination, and then maybe termination
> power.
>> The NVR/TOY battery is also dead, might this be affecting it?
> I can't imagine that it would.
>
> (snip)
>

And remember that BOTH ENDS of the bus must be terminated!

If the controller is at one end of the bus, it supplies termination; a 
switch or jumper enables termination at the controller.  If not, be 
certain that BOTH ends are terminated.

Also be certain that the bus is terminated exactly twice; once at each 
end!  Zero will not work!  One will not work.  Three will not
work. . . !

If you get this wrong you'll regret it later, IF THERE IS A LATER!

Also, replace that battery.  You should be able to find  one in any
well stocked super market or pharmacy.  The machines I'm familiar with
use a CR2013 battery but you should CHECK IT!!!!