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

Responses
7. You cannot detach volumes in the SYSCPVOL list that are in use by the
system, shared by another system in a CSE complex, or devices containing
minidisks to which users are linked.
8. If a tape device being detached was transferred to a user with the GIVE (Real
Device) command, the LEAVE or UNLOAD option specified on the DETACH
command overrides any option that was set when the GIVE command was
issued. If LEAVE or UNLOAD is not specifically requested on the DETACH
command, the option specified when GIVE was issued is processed. If no
option was specified on either GIVE or DETACH, the tape is rewound and
unloaded.
9. If a device was attached using the CP ATTACH command and later detached,
the system operator receives a response saying that the device was detached.
10. For more information, see “Usage Notes” on page 232.
11. When the primary or the secondary volume of a duplex pair is detached from a
virtual machine, the response generated will indicate that the volume was
either the primary duplex volume or the secondary duplex volume of the duplex
pair. When the primary of a duplex pair is detached from the system, the
response generated will indicate that the volume was the primary duplex
volume of the duplex pair.
12. A tape device attached with the SINGLEUSER option (the default) will
automatically be unassigned by CP when the device is detached, unless the
LEAVE option is specified on DETACH or the tape was attached with the
NOASSIGN option.
A tape device attached with both the SINGLEUSER and NOASSIGN options
will not be unassigned by CP when the device is detached, regardless of
whether the tape is currently assigned by a guest. In other words, CP will not
change the ASSIGNED or UNASSIGNED status of the drive. It is the
responsibility of the guest to issue the ASSIGN CCW when it needs the tape
drive and to issue the UNASSIGN CCW when it is finished using the drive.
13. A tape device attached with the MULTIUSER option will be unassigned by CP
when the device is detached, even though MULTIUSER implies NOASSIGN.
This prevents one user from unexpectedly locking out many other users from
the drive.
The user who currently owns the device (if different from the primary system
operator), the user who issues the DETACH (real device) command (if different from
the owner of the device), and the primary system operator (if different from the user
who issued the command) each receive messages indicating that the DETACH (real
device) is successful.
Note: The type variable in the following responses is omitted when a range of
device numbers or multiple device numbers are being reflected in the
response.
In the responses below, the term type is one of the following:
Type Meaning
CTCA Channel-to-channel adapter
CTLR 37xx Communications Controller
DASD Direct access storage device
FCP SCSI device adapter
GRAF Display device
MSC Mass Storage Controller
DETACH (Real Device)
Chapter 2. CP Commands 247