Example 6

CHPID PCHID=100,PATH=(CSS(0,1),40),TYPE=FC,SWITCH=25 

CNTLUNIT CUNUMBR=280,UNIT=2105,UNITADD=((00,256)),CUADD=01,           X
              PATH=((CSS(0),40),(CSS(1),40)),                         X    
              LINK=((CSS(0),D0),(CSS(1),D0))                             

The preceding statement performs the following actions:

• Define a spanned FC channel path.
• Assigns 280 as the control unit number of the IBM 2105 Enterprise Storage Server.
• Defines unit addresses 00-FF for the logical control unit.
• Defines logical address 01 for the logical control unit.
• Assigns the control unit to channel path 40 in CSSs 0 and 1.
• Assigns the same link address D0 to channel path 40 in both CSSs.

When configuring a spanned channel path to use the same link address in its CSSs for the same control unit logical address (CUADD), define a single control unit containing all the CSSs for the channel path. Do not define separate control units for each CSS for the channel path. Doing so would violate the rule that the path combination pchid.link.cuadd can occur only once in the configuration. For example, control unit 280 in the preceding example could not be defined as follows:

CNTLUNIT CUNUMBR=280,UNIT=2105,UNITADD=((00,256)),CUADD=01,           X
              PATH=((CSS(0),40)),LINK=((CSS(0),D0)) 
CNTLUNIT CUNUMBR=281,UNIT=2105,UNITADD=((00,256)),CUADD=01,           X
              PATH=((CSS(1),40)),LINK=((CSS(1),D0))

See Configuration examples for more CNTLUNIT statement coding examples.