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

RESET
RESET
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RESET
Authorization
Purpose
Operands
vdev
Usage Notes
RESERVE
ASSIGN
rdev
Privilege Class: B, G
1168 z/VM: CP Commands and Utilities Reference
ON
Use RESET to clear all pending interrupts from a specified virtual device.
vdev
is the virtual device number of the device to be reset.
RESERVE ON
releases the RESERVE status of a system shared DASD. The ON operand is
optional.
ASSIGN ON
unassigns a tape drive. The ON operand is optional.
rdev
is the real device number of the device to be released.
1. CAUTION:
If you must release a device that is being reserved by CP for some user,
you can use the RESET RESERVE command. You should use this
command only when you know that the user for whom CP is holding the
reserve is hung or is holding the reserve for too long and preventing
access to the device by other users.
2. In addition to clearing all pending interrupts, all virtual sense bytes and error
conditions occurring as a result of unit checks are reset.
3. The operator of a virtual system can issue the RESET command to return to CP
any local displays that were connected to the virtual system using the DIAL
command.
4. The reserve status of system DASD may be determined by issuing the Class B
QUERY DASD RESERVE command.
5. When RESET RESERVE is issued to a device, that device immediately
becomes available to the other sharing system.
6. If the specified tape drive is in a GIVEN state the issuer must be the user ID to
whom the tape drive was given, or the command is not performed.
7. The RESET RESERVE command can, in some cases, be used to reset a
device that is RESERVED BY SYSTEM. Normally a device in this state is in
transition, and a subsequent query will indicate the device is reserved by a user,
or not reserved. However, if querying the device consistently returns
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