StorageTek 6 manual VM Environment, VM Operating System CP and CMS

VM Environment

The VM version of the HSC product is the implementation of the ACS Host Software Component (HSC) product on VM. The principal interfaces and components under VM are:

•VM Operating System (CP and CMS)

•The System Control Program (SCP)

•The Host Software Component (HSC)

•The tape management system (TMS)

•Operators and utility users.

VM Operating System (CP and CMS)

VM HSC requires relatively few system services. The VM system services that are used are:

•Spool files

•Inter-User Communications Vehicle (IUCV)

•IUCV-based services *MSG and *BLOCKIO

•Diagnose

•RSCS

•VMDUMP Storage Dumps

•Interactive Problem Control System (IPCS) for VM/SP, or Dump Viewing Facility for VM/XA and VM/ESA

•CMS (at initialization only).

CMS

The first portion of the SCP initialization process is executed under CMS. During this time various files are read and some control data set locations are noted for reference. After the program modules have been loaded into storage and the major control blocks have been created, CMS is replaced by the SCP.

6VM/HSC 6.0 System Programmer’s Guide

1st ed., 6/30/04 - 312579601