On VM/CMS systems, two versions of SYSREQ exist. The first requires a CP modification to add a new command plus a diagnose (Diagnose 140). The second version uses IUCV and is enabled by selecting IUCVREQ when installing the package via the PATCHY [5] command +USE,IUCVREQ.
SYSREQ-TCP provides a remote interface to a central SYSREQ server over TCP/IP connections. SYSREQ-TCP is currently only used to provide remote access to the HEPVM Tape Management System (TMS) from nodes at CERN other than CERNVM, where the TMS currently resides. However, the mechanism of passing commands and messages to a server that is already running is of general use and so it is planned to release this code as a separate component that avoids all use of SYSREQ on the IBM system.
Both command line and FORTRAN callable interfaces to SYSREQ exist. The command line interface is shown below.
Using the SYSREQ command line interface
SYSREQ service command e.g. SYSREQ TMS QVOL I29021