[Info-vax] question on HBVS and SHOW DEVICE

[Phillip Helbig---undress to reply]

In article <4debf051-43ec-4fb5-bfa2-24017608ca8b at googlegroups.com>, Ken
Fairfield <ken.fairfield at gmail.com> writes: 

> > Correction: "shadow set virtual unit" appears for the last 2 disks 
> > listed but not the first.  The first disk is "served to cluster via MSCP 
> > Server" which implies that there is a direct path from the host to the 
> > second and third disks but the first is physically connected to another 
> > system and is visible via MSCP.
> 
> Almost, Paul.  The 2nd and 3rd units, alloclass $150$ and $170$,
> are MSCP-served to the host doing the SHOW DEVICE.  That's why
> their output includes a "Host name" line.   

Right.

> The key here is that the output varies depending upon whether
> the disk in question is locally attached or accessed via MCSP.

Right.

> The choice of what particular text gets displayed was simply a
> decision of the VMS Engineers who wrote the code, eh?  

Yes, but a bit confusing.  Why should "shadow set virtual unit" appear 
for disks with no direct connection?

> I would
> have thought Phillip would have figured that out pretty quickly 
> since he's intimately familiar with his cluster...

I think I did figure it out after I posted the original question.  :-|

Presumably, the output has always been this way, but I had never noticed 
the difference.