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

Responses
user PROFILE EXEC is invoked after the SYSPROF EXEC. You can bypass the
SYSPROF EXEC by specifying the NOSPROF parameter on the IPL command.
5. If you have defined disks with virtual device numbers 190 and 19E in the
system directory, or if they are defined before you IPL CMS, these disks are
accessed as the S- and Y-disks, respectively. After you IPL CMS, you must
enter explicit ACCESS commands to access other disks. Ordinarily, you have
access only to files with a file mode number of 2 on the system disk.
If you have defined disk address 191 and the FILEPOOL parameter is omitted,
the 191 disk is accessed as file mode A. However, if the FILEPOOL parameter
is specified, your top directory in the identified file pool is accessed as file mode
A, even if you also have a 191 minidisk defined. If the access of the top
directory fails (perhaps because the file pool is unavailable), the 191 minidisk is
accessed. If there is no 191 minidisk, nothing is accessed as file mode A.
When ACCESS is the first command issued after an IPL of the CMS system, file
mode A is not automatically defined. Another ACCESS command must be
issued to define file mode A.
For more information on the CMS ACCESS command, see z/VM: CMS
Commands and Utilities Reference.
6. If you have a disk defined as virtual device number 192, the following special
rules apply when CMS is IPLed:
v If 192 is an unformatted temporary minidisk or virtual disk in storage, CMS
formats it and accesses it as file mode D.
v If 192 is a CP-formatted temporary minidisk or virtual disk in storage, CMS
reformats it for CMS use and accesses it as file mode D.
v If 192 is a CMS-formatted temporary minidisk, virtual disk in storage, or
permanent minidisk that is accessed as a file mode other than D, CMS
reaccesses it as file mode D.
v If 192 is an unformatted or CP-formatted permanent minidisk, CMS does not
automatically format, reformat, access, or reaccess it.
When CMS accesses a 192 minidisk as file mode D, any minidisk or SFS
directory already accessed as D is released.
Usually, after a successful IPL, any responses you receive are those from the
operating system that was loaded and initialized.
Response 1:
Trace active at IPL
is issued when tracing is active.
Response 2:
Trace active at IPL
This may cause some architectured facilities to
not be available at your virtual machine. Turn Trace
off and re-IPL to recover use of these facilities.
is issued when a trace set is found during the IPL of a preferred guest. This will
result in the disablement of assists which interpret the SIE instruction. These assists
can only be used when TRACE is not in effect for a guest.
Response 3:
IPL stop at xxxxxxxx
IPL
Chapter 2. CP Commands 507