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

VARY (Real Device)
VARY (Real Device)
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VARY
Authorization
Purpose
Operands
ONline
OFFline
Usage Notes
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rdev
rdev1-rdev2
rdev
rdev1-rdev2
Privilege Class: B
1710 z/VM: CP Commands and Utilities Reference
NOASSIGN
ASSIGN
FORCE
TEST
Use VARY (real device) to do the following:
v Enable or disable a device for the control program (CP)
v Enable or disable a device for the user.
ONline
OFFline
enables or disables the logical connection.
rdev
rdev1-rdev2
is the number of the real device to be varied online or offline. You may specify a
list or range of devices. If you specify a range of real device numbers, all valid
devices in the range, including the first and last devices you specify, are varied
online or offline. The maximum number of devices allowed in a range is 256.
NOASSIGN
ASSIGN
tells CP to try to ASSIGN or UNASSIGN the device to CP at vary on time. If the
ASSIGN fails, the device is not varied online.
FORCE
specifies that an attempt be made to bring the device online even if another
function has prevented the device from coming online.
TEST
specifies that CP bring the device online even if conditions exist that would
normally prevent the device from successfully being brought online.
1. If you specify a list or range of devices, an attempt is made to vary them online
or offline regardless of whether an error is encountered with any one of the
specified devices. An error message is issued for every device that cannot be
varied online or offline. A summary message is issued to indicate the number of
devices successfully varied online or offline.
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