Re: creating DASD

Mike Stramba wrote:
> Ivan,
> 
> I forgot that you can logon to CP / VM, without having CMS running ;)
> ... and that you could do an IPL command from CP.  ...
> 
> Even though I've done an IPL  many times ;)
> 
>  (I.e. dropped to a CP prompt for various reasons .. redefining STOR size ..etc)
> 
> Mike
> 

That's right !

As far as CP is concerned, CMS is just yet another operating system!

You just have to make parallels between the 'virtual world' and the 
'real world'..

So logging on into a virtual machine is the virtual equivalent of 
powering on a system (or starting hercules).

The CP commands are the virtual equivalent of the hardware/manual 
controls + devices controls - and hercules panel commands.

... a few examples : (V = CP Command in VM, R = Real World action (S/370 
era), H = Hercules action)

V - LOGON
R - Power on
H - Start hercules

V - CP DEFINE STORAGE 16M
R - Calling your fav IBM rep and fitting your rig with 16MB
H - having a MAINSTOR 16 statement in your hercules config

V - DEFINE GRAF 400
R - Buying a Channel attached 3174, connecting it to the system on 
channel 4 with a CU Address of 00
H - having a '400 3270' statement in your herc config

V - DIAL <vmuser> (from an enabled terminal)
R - Connecting a 3270 terminal to the aforementioned 3174 and powering it on
H - issuing a tn3270 connection to a running instance of hercules

V - SYSTEM RESET
R - The "System Reset" manual control
H - Issuing the "sysreset" command from the hercules panel

V - PURGE RDR 0001 (assuming Spool file id 0001 is at the top)
R - Manually removing a stack of card from a real card reader
H - devinit <cuu> * (where <cuu> is the address of a card reader)

Etc..

--Ivan