[Info-vax] Replacing SCSI disks in PS433AU for VMS

[Chris Townley]

On Friday, October 2, 2020 at 6:04:03 PM UTC+1, johnwa... at yahoo.co.uk wrote:

> > Chris
> 
> Does your spec match your particular system? From memory, there were 
> at least two generations of PWS433au systems. Wikipedia has some 
> words on the subject; 
> 
> Traditionally I'd suggest finding a QuickSpec for the model but 
> there isn't an obvious one at the moment.
> 
> There is a PWS User Information document at
> https://web-docs.gsi.de/~kraemer/COLLECTION/DEC/alunxuib.pdf
> which may be helpful but doesn't have much to say on this particular 
> subject.
> 
> Basically if you want it to boot VMS from a SCSI drive, SRM console 
> (in ROM) needs to know about the SCSI adapter. This typically led to 
> Qlogic 1020 or 1040 adapters, either add-in or built-in. Beyond that, 
> the VMS Software Product Description for your chosen VMS version 
> might shed some light on what adapters and drives were supported. 
> What *works* (at least in terms of drives) would often be a bit more 
> generous, so long as you don't get too ambitious.
> 
> This SCSI magick was always a bit of a maze to me, and it's been a 
> long time. 
> 
> Best of luck.

I have been running various versions of VMS on this for 17 years! So there is any problem there. I was responding to a suggestion that some devices would not boot, but would work as a data drive

Chris