HAVAIL

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   .-HAVAIL--=--NO------.   
>>-+--------------------+--------------------------------------><
   |            .-NO--. |   
   '-HAVAIL--=--+-----+-'   
                '-YES-'     

Determines whether the application can support extended recovery facility (XRF) sessions.
HAVAIL=NO
Specifies that this application program cannot have an XRF session.
HAVAIL=YES
Specifies that this application program can have an XRF session, can initiate an XRF session, or can be the primary logical unit in an XRF session that is initiated by a secondary logical unit.