Channel-set Switching
The
Attached Processor provides increased processor availability and
recoverability on this system.
The Channel-set
be taken offline (via the
uniprocessor mode with the
processor, thus increasing system availability during main processor
preventive maintenance.
Also, the Channel-set Switching feature allows
Automatic Processor Recovery in the case of a Time-of-Day clock error on
the main processor (provided the main processor was in problem state at
the time of the failure). The system converts to uniprocessor mode and
continues to run with the Channel-set connected to the attached
processor. This increases system recoverability and availability over a
main processor failure and servicing.
For a more detailed discussion, refer to
Channel-set.
At initialization time,
instruction. If the instruction executes successfully the feature is
available.
with the address of the Channel-set of the initiated device.
this bit before attempting to
attempting to recover from a hardware failure on the main processor.
ins tructions.
Note: An '016' disabled wait state will be loaded when the disconnect or
connect Channel-set instruction does not work. If this wait state
occurs, contact your
t
Channel
GC2o-1801 Planning and
GC20-1806 Operator's Guide
GC20-1808