[Simh] RRD40 emulation problem

[Michael Unger]

On 2009-04-08 18:11, "del121 at cinci.rr.com" wrote:

>  [...]
>  
> Operationally the most obvious difference between 'inserting' the cd on the 
> simhvax and my 3100 was the vms device attributes. On simh-vax VMS always 
> reports 'Total Blocks 1331200' but on the 3100 it seems the hardware senses the 
                        ^^^^^^^
> actual track size; differant CDs yield differant 'Total Blocks'.

That's most probably the _nominal_ block count of a "standard" 650 MB CD.

I had no problems using a utility called "MkImage" [1] by SoftResInt,
err, Stromasys, that copies an ODS-2 (can't comment an ODS-5 devices) CD
to an image file which worked quite well with SimH and PersonalAlpha on
a Windows XP system. I've used that with many OpenVMS OS and Freeware
CDs of different "used block" counts ...

> On a hunch, I changed my simh device type from RRD40 to RA60 (~200MB removable 
> disk pack) and attached the *same* 5.5-2 cd rip (readonly) to that. Voila! Now 
> VMS happily mounts it on simh-vax. 

... mounting these disk images _read-only_ and as an "RAUSER" disk;
AFAIR I had to specify the actual size when mounting this "container" file.

> [...]

Michael


[1] <http://www.stromasys.ch/charon-vax/Tools_and_tips.htm>