character (normally, the ¢ symbol) or press the CANCEL key (or its
equivalent). The CANCEL key on the 3215 cannot cancel lines of input until you
finish defining the V8/370 system during system generation. Also, the PAZ key or the CANCEL key on the 3270 and 3066 cannot cancel input
lines. --
For details on supported V8/370 typewriter terminal consoles, display
terminal consoles and the associated keys that manage the display
screen, signal attention, and process line 'records, consult the !IlL;!IQ Operating Procedures CP and C8S, with the exception of the special CP service programs and
certain frequently used CP functions, get all of their system functions from disk. Each of the disks mayor may not be labeled. If the disks
are for C8S file residence, or CP paging and sFooling (temporary use),
you must label each pack with a six-character label in real cylinder 0 track 0 record 3 by using the CP Format/Allocate program.
The V8/370 system is device-independent; each of the volumes that
have CP labels can reside on any available and defined 2314, 2319, 3330, 3333, 3340, 3344, 3350 or 2305 direct access storage device. This
definition occurs at system generation time. The CP system residence (SYSRES) volume must be mounted on an available IPt device; then with
the load switches dialed to that DASD device pressing the LOAD button viII bring up the system. CP-owned volumes (cne each for paging and
spooling) must be mounted and ready. All other resident volumes should
be mounted and ready when the system is started, although they can be
added later (via the CP ATTACH command) to the system, while it is in
operation. AFFINITY, SASSIST, CPASSIST, RESERVE, commands): These can be assigned only
class A. !2 (FAVORED, PRIORITY, LOCK, and UNLOCK by an operator with privilege j!andli.ng of I.nEut QY!:Eut: Card decks for users must be fed
into the real card reader, printed and punched output properly
distributed, and the unit record equipment and spool data files
controlled. The control functions for the system's unit record equipment and spool data files can be performed only by a class D
operator. !1l.9 Deta£!!ing of and Volume2: Devices used by
virtual machines in dedicated mode must be attached and detached as
appropriate. Control over the real system/370 computing system's I/O can be performed by an operator with privilege class B.
Operators with these privilege classes must be logged on to perform these functions. Below is a directory entry for an operator to perform all of these functions: USER OPERATOR OPASS 512 18 ABDG
The system and spooling operators do not require virtual devices or
options in their VM/370 directory entries unless CMS is used. Kultiple virtual machines for operators may be set up, each with all or some of
8 YK/370 Operator's Guide
the associated privilege classes. The primary system operator must have
class A assigned in the directory to properly initiate V8/370 operation. SYSTE8 DEFINITION If you intend to define or attach more than 64 virtual devices for a
single virtual machine, be aware that any single request for free
storage in excess of 512 doublewords (a full page) may cause the V8/370 system to issue an appropriate error message if the extra storage is not
available on a contiguous page. Therefore, two contiguous page frames of free storage must be available in order to log on to a virtual machine with more than 64 virtual devices (three contiguous page frames for a virtual machine with more than 128 virtual devices, etc,.).
Contiguous page frames of free storage are sure to be available only immediately after IPL, before other virtual machines have logged on.
Therefore, as a system operator you can inhibit the logon of many virtual machines until the virtual machine or machines with many I/O devices have accomplished logon and are operating. SYSTEM INITIALIZATION Successful V8/370 system initialization starts with the initial program
loading of the CP system residence (SYSRES) pack. Whether performing a
cold, warm, or checkpoint start, the following ccnditions must be met: The processor, processor storage and all necessary devices (and disk volumes) for a minimum V8/370 system, system residence, paging, and
spooling requirements must be powered up and ready. No unrecoverable catastrophic hardware errors are encountered in the
initialization and startup phase of bringing the VM/370 system online. There must be a matching compatibility between the generated V8/370 SCP and the System/370 hardware and its attached features. Failure
of matching compatibility can result in an error message as well as VM/370 performance degradation (for example, refer to the V8/11Q and the message D8KCPI185E). System startup involves CP initialization; checkpoint functions; and
subsequent warm start, checkpoint, or cold start procedures. When you turn system power on, you may have to run a CS (control storage) patch
routine. This is a System/370 operating procedure and this book
discusses it nd further. System initialization establishes and maintains the integrity of V!/370 even as it is being started. Checkpoint operations provide
continuity for certain CP functions that are carried over from a previous V8/370 session. Checkpoint is invoked at initialization,
shutdown, and after a system dump. Warm start procedures allow the
operator to bring the V8/370 system up after a previous abnormal termination with certain controls saved from the previous system's session that will be used after the current system initialization is complete. The operator begins cold start if previously captured V8/370 session data or controls were destroyed or are invalid.
To initiate the operation of the V8/370 system, load the CP system residence volume. Section 2. Initiating V8/370 Operation 9
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