Shared devices using shared channels

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MIF allows you to use shared channels when defining shared devices. Using shared channels reduces the number of channels required, allows for increased channel utilization, and reduces the complexity of your IOCP input.

Note: You cannot mix shared and unshared channel paths to the same control unit or device.

Following is an example of an IOCDS with a shared device.

Figure 1. Shared devices using shared FICON channels

Following is the IOCP coding for Figure 1.

CHPID PATH=(30),TYPE=FC,SWITCH=03,SHARED . . .
CHPID PATH=(34),TYPE=FC,SWITCH=03,SHARED . . .
CNTLUNIT CUNUMBR=000,PATH=(30,34),UNITADD=((90)),LINK=(E0,E0),UNIT=xxx . . .
IODEVICE ADDRESS=(190),CUNUMBR=000,UNIT=xxx . . .