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

This means that the magnetic tape drive at the address 0102 is attached to
RALPH’s virtual machine as the virtual device number 0236. R/W means that the
user RALPH has read-write access to the tape drive. R/W might also read R/O,
which means the user has read-only access.
If the tape drive is assigned to receive system dumps, you see something like this:
TAPE 0238 ASSIGNED SYSTEM DUMP
If the tape drive is currently being used by the TRSAVE command, you see
something like this:
TAPE 0242 ASSIGNED SYSTEM TRSAVE
If a tape that is not dedicated to a user is not available (boxed), you see something
like this:
TAPE 0244 BOXED
If a tape drive has been attached MULTIUSER to one or more users, you see
something like this:
TAPE 2100 ATTACHED TO USER1 0181 R/W NOASSIGN MULTIUSER
TAPE 2100 ATTACHED TO USER2 0181 R/W NOASSIGN MULTIUSER
This means that the tape drive at real address 2100 is attached to USER1 and
USER2 at virtual device address 0181. MULTIUSER indicates that the tape drive is
shared by both users, and NOASSIGN states that the users must manage the
assignment of the tape drive by using assign and unassign I/O.
Responses for free or offline tape drives will be in the same format.
Responses from Real Unit Record Devices:
If a unit record device is dedicated to a user, you see something like this:
RDR 000C ATTACHED TO JAMES 02F0
This response means that the real card reader at the device number 000C is
dedicated to JAMES’s virtual machine at the virtual device number 02F0. RDR
might be replaced by PRT or PUN, depending on the kind of unit record device.
ATTACHED might be replaced by BOX/ATTC, which indicates that the device is
attached to the virtual machine but is unavailable (usually because of a hardware
problem).
Responses from Active Readers:
If a reader is assigned to the system for spooling activity and it is currently active
with a spool file, you see a message like this:
RDR 000C STARTED SYSTEM
RDR 000C READING PERCY FILE 0021
QUERY ALL
000C is the real device number of the card reader. STARTED indicates the device
is available for spooling activity. SYSTEM means the device is available for input
with user identification cards. STARTED might be replaced by any of the following:
v DRAINING, which means the device would be unavailable for spooling activity as
soon as it finished processing the current file.
v DRAINED, which means the device was unavailable for spooling activity. You
could enter the CP START command to restart it.
Chapter 2. CP Commands 677