IBM Z9, Руководство по планированию

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The configuration can be activated by performing a POR or by performing a
dynamic I/O configuration.
In Figure 2-17 (shared device), ZOSTEST can access device 180 through
CHP 04 and CHP 10 if CHP 04 is defined to ZOSTEST in the IOCDS.
In Figure 2-17 (unshared device), ZOSTEST can access either device 180
(unshared device) if one or both of the devices are assigned a new device
number in the IOCDS.
When a device number conflict exists, logical partitions will fail to activate. This will
happen when one of the following occurs:
v
The receiving logical partition was deactivated when a channel path is
reassigned
v The receiving logical partition is deactivated after a channel path is reassigned
Failure to activate can result if options A or B are used. If a logical partition fails to
activate, use option B or C to resolve the conflict and to activate the logical
partition.
In Figure 2-17, if ZOSTEST is not active when CHP 04 is reassigned, or ZOSTEST
is deactivated and then activated after CHP 04 is reassigned, ZOSTEST does not
activate until the conflict over device 180 is resolved.
If you resolve the conflict by using option&rbl.B do the following steps:
1. Establish the correct configuration by configuring offline one of the channel
paths (CHP 04 or CHP 10)
2. Configure offline and then online the other channel path
If it’s necessary to have access to other devices on the first channel path, the
operator can configure online the first channel path while the LP is active. Ignore
the messages issued at the hardware console.
The following IOCP statement example shows coding that removes duplicate device
number conflicts for shared devices.
CHPID PATH=(00),PARTITION=(ZOSPROD,REC), . . .
CHPID PATH=(04),PARTITION=(ZOSPROD,REC), . . .
CHPID PATH=(10),PARTITION=(ZOSTEST), . . .
CNTLUNIT CUNUMBR=0001,PATH=(00,04),UNITADD=80
CNTLUNIT CUNUMBR=0002,PATH=(10),UNITADD=80
IODEVICE ADDRESS=180,CUNUMBR=(0001,0002)
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PR/SM Planning Guide