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

SET LKFACR
►►
Set
Authorization
Purpose
LKFACR
Operands
Usage Notes
Responses
ON
OFF
▼
Privilege Class: G
Use SET LKFACR to control whether a full-pack minidisk is to use the real
multi-path lock facility (MPLF) of a 3990 model 6 control unit.
ON
indicates that the device will use the real MPLF facility
OFF
indicates that the device will not use the real MPLF facility.
vdev
vdev1-vdev2
is the virtual device number or range of virtual device numbers of the devices to
be enabled or disabled for real MPLF.
1. Attention: SET LKFACR ON causes a SYSTEM RESET of your virtual
machine whenever one or more of the specified virtual devices have been
enabled for MPLF simulation through the SET LKFAC command. Use the
QUERY LKFAC command just before issuing SET LKFACR ON to see a current
list of the virtual devices that would cause such a SYSTEM RESET of your
virtual machine.
2. SET LKFACR ON will prevent the virtual device from using simulated MPLF
until the next SYSTEM RESET.
3. The virtual machine must have lock facility authorization in order to use the real
MPLF facility. See directory OPTION LKFAC in the z/VM: CP Planning and
Administration.
4. SET LKFACR ON is only valid for full-pack minidisks. Non-full-pack minidisks
can only use the simulated MPLF facility. For more information, see “SET
LKFAC” on page 1271. Dedicated DASD always use the real MPLF facility,
provided that the virtual machine has the proper authorization. See directory
OPTION LKFAC in the z/VM: CP Planning and Administration.
Response 1:
vdev
vdev1-vdev2
Real MPLF is {enabled } for DASD vdev
{disabled}
is issued when the command completes successfully.
SET LKFACR
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Chapter 2. CP Commands 1273