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

VARY VECTOR
VARY VECTOR
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VARY
Authorization
Purpose
Operands
Usage Notes
Responses
ONline
OFFline
VECtor
nn
Privilege Class: B
Use VARY VECTOR to specify the vector to be varied online or offline. VARY
VECTOR does not change the status (online or offline) of the processor associated
with the vector, and VARY PROCessor nn does not change the connection status of
the Vector Facility.
Note: In order to be varied, the Vector Facility must be attached to a configured
and online processor.
ONline
OFFline
enables or disables the logical connection.
VECtor nn
identifies the Vector Facility associated with processor nn.
1. A Vector Facility is permanently associated with a single CPU and can be used
only by the associated CPU. The address of the Vector Facility is the same as
that of the associated CPU.
2. A Vector Facility that is connected to a real dedicated processor may be varied
offline. If the virtual CPU dedicated to the processor with the varied offline VF
already has a virtual VF, later use of the virtual VF results in virtual VF failure
machine checks. If an attempt is made to vary off a dedicated VF, the system
issues an error message.
3. If the last undedicated Vector Facility is being taken by a VARY OFFLINE
command, the system issues a warning message. Any V=V guest that has a
virtual VF defined when the last real Vector Facility becomes unavailable
receives a Vector Facility failure machine check if it issues any vector
instructions. V=V guests that define virtual vector facilities after the last real
vector has gone away receive a warning message.
Response 1:
VECTOR FACILITY nn OFFLINE
indicates that the Vector Facility is now unavailable.
Response 2:
VECTOR FACILITY ONLINE
1716 z/VM: CP Commands and Utilities Reference
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