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Re: Can a VM machine ...

 

Yup!

When I added STK4400 support to the Cray VM Station, worked with the MVS group, and the Cray side, I had to add IUCV to the VM Station.? Upto that point in time we had been using VMCF.?

The VM Station was its own unique OS (like RSCS, VS1, or MVS).? We did it all up to and including our own CCW programming.

On Sun, Nov 20, 2022, 08:52 laddiehanus via <laddiehanus=[email protected]> wrote:
I worked at StorageTek on tape libraries and virtual tape from 1984 to 2017 with a 6 year vacation. The 4400 and newer tape libraries under worked on vm by using IUCV for sending a command to a service machine that ran a modified version of HSC which was the MVS Host Software Component that controlled the tape library. The tape library had a 3270 connection that was used by HSC to communicate with the library.? I don¡¯t remember?the data shipped along the 3270 connection?. Suffice it to say that the was a mount command and unmount?command. It also required VM/SP so I don¡¯t know if something similar could be done on older releases of VM. This is what the customer saw so I can share this. What I know about the internals I can¡¯t share due to my employment contract that I signed when I started there. And I respect that. Every little bit?is left of STK is owned by Oracle who bought Sun. Which bought STK


As for diag 8 hercules will process it and will do the devinit to mount. The issue is what will CP will do when the status is presented to it by hercules.

And diag 8 option is documented on the website for hercules go read it how it is enabled in other words RTFM.

Next?Hercules has implemented a CCW that came from the p/390 and still exists in z/PDT I believe. Grab the source zip file from SDL hercules and there should be a readme on it and a sample program. Caution: writing a channel program you need to know about how I/O works and can be very difficult to debug. I can¡¯t help you due to my employment contract with my current employer?

Have a great day

Laddie Hanus









On Saturday, November 19, 2022, 11:34 AM, Bertram Moshier <herc370390vm@...> wrote:

Dave,

No, I'm talking about something like the STK4400.? I was the lead programmer at Cray and also the VM programmer for making a STK4400 talk to both the Cray and IBM system.? In the end, we supported both MVS and VM.
Thank you.

On Sat, Nov 19, 2022, 11:28 Dave McGuire <mcguire@...> wrote:
On 11/19/22 12:06, Bertram Moshier wrote:
> I know this would not be possible with real iron, but might be with
> emulation

? ?Many 3480/3490/etc drives ("square tapes" to you IBMers ;)) have
media changers on them.? We have several of those at LSSM.? I'm pretty
sure they can change media under host control.

? ?Unless you're talking about something different..

? ? ? ? ? ? ?-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
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