z/VM: CP Commands and Utilities Reference - z/VM - IBM

DEFSYS
Examples
Messages
13. If you do not specify the MACHMODE parameter, the NSS can be saved
(through the SAVESYS command) when the virtual machine is in any
architecture mode, but the NSS can be IPLed only when the virtual machine is
in the architecture mode in effect at the time the NSS was saved.
If you specify the MACHMODE parameter, the NSS can be saved and IPLed
only when the virtual machine is in an architecture mode specified on the
MACHMODE parameter.
14. Virtual machines that are designated as XA virtual machines (for example, by
SET MACHINE XA) and virtual machines that are designated as ESA virtual
machines are equivalent. Both designations cause the virtual machines to
operate as ESA virtual machines. The virtual machine mode designations XA
and ESA can be considered synonyms. Because of this, NSSs that are defined
specifying MACHMODE ESA can also be saved when a virtual machine has
been designated as an XA virtual machine, and the reverse. Similarly, an NSS
that can be IPLed when a virtual machine has been defined as an ESA virtual
machine can also be IPLed when a virtual machine has been defined as an
XA virtual machine, and the reverse.
Security Notes:
HCP002E Invalid operand - operand
HCP009E Invalid range - range
1. When RSTD is specified, only those users whose directory entries contain a
NAMESAVE statement specifying the same name as the DEFSYS operand are
allowed to IPL the NSS. This allows the installation to ensure data integrity by
restricting access to NSSs that contain shared writable storage (defined with the
SW and SN page descriptor codes), or to a CP NSS (defined with the SC page
descriptor code), which may contain sensitive data.
2. Virtual machines that share read/write pages, defined with the SW and SN page
descriptor codes, are responsible for the integrity of the shared data. The
operating system that uses these shared writable pages should ensure that
these virtual machines are properly protected from one another.
CP DEFSYS CMS 0-D EW 20-23 EW F00-13FF SR MINSIZE=3M
MACHMODE XA,ESA,XC PARMREGS=0-15
defsys wss 0-8 ew 300-5ff sw 600-fff sn minsize=4m rstd
defsys newsys 0-4 ew e-21 ew 800-86f sr minsize=256k parmregs=0-15
machmode esa,xc
HCP263E Too many operands were supplied for
this command.
HCP299E The Named Saved System (NSS) name
could not be defined because a class S
file with the same name already exists.
216 z/VM: CP Commands and Utilities Reference
HCP339E The command processing cannot
complete because the page descriptor
code invalid-code for the page range
nnnnn-nnnnn should be exclusive.
HCP422E The same option was specified twice.
HCP423E The function requested is incompatible
with a previously specified operand.
HCP427E type {rdev|vdev|name[.userid]} system
spool space full; file
{closed|held|purged}