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

Responses
4. Temporary disks created with this command have cache access if they are on a
cached control unit.
5. If you define a temporary disk as virtual device number 192, the following
special rules apply when you IPL CMS:
v If 192 is unformatted, CMS formats it and accesses it as file mode D.
v If 192 is CP-formatted, CMS reformats it for CMS use and accesses it as file
mode D.
v If 192 is CMS-formatted and accessed as a file mode other than D, CMS
reaccesses it as file mode D.
When CMS accesses a 192 minidisk as file mode D, any minidisk or SFS
directory already accessed as D is released.
6. For more information, see “Usage Notes” on page 113.
DASD vdev DEFINED
confirms the definition of the temporary disk.
DEFINE (Temporary Disk)
Chapter 2. CP Commands 191