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

UTILITY
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UTILITY
Purpose
Operands
DTYPE devno
UTILTAPE ALL
DSF
DDRXA
VTYPE devtype
Use the UTILITY utility to provide occasionally-used installation utility functions:
v Issuing DIAGNOSE code X'24' and X'210' for a virtual device
v Creating a stand-alone service utility tape for either or both ICKDSF and DDRXA.
DTYPE devno
issues a DIAGNOSE code X'24' and X'210' for the specified virtual address,
uses the returned information to look up the DASD type in the $DASD$
CONSTS file, and returns that information to the terminal (if UTILITY DTYPE is
issued from the terminal) or to the program stack (if UTILITY DTYPE is called
by an exec).
The information returned is a single line consisting of three fields:
v DASD type, model, or both
v The capacity of the device in cylinders
v The proper representation of the given DASD model to the CPFMTXA
program.
If the virtual device address is incorrect, nonexistent, or addresses an
unsupported device type, a nonzero return code is displayed.
The UTILITY DTYPE function is intended primarily for use by installation-related
utilities.
UTILTAPE
creates a tape containing either or both of the following stand-alone utility
programs:
DSF: Device Support Facility (ICKDSFSA COREIMAG)
DDRXA:
DASD Dump/Restore program (IPL DDRXA)
UTILITY
on a tape drive at virtual address 181.
The version of DDRXA or ICKDSFSA that occurs first in the minidisk search
order is the version placed on tape.
If ALL is specified, both IPLable programs are written to the same tape file, with
ICKDSFSA being written first. After the last program, two tape marks are
written. When ALL is specified, to IPL the DDRXA program from the tape, you
must IPL twice to bypass ICKDSFSA.
If you do not have a R/W A-disk the tape write operation will complete but no
$MSGLOG will be created.
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Chapter 3. CP Utilities 1885