On Fri, 18 Jul 2014 13:27:59 +0200, Peter Hunkeler wrote: >> Remember the merge order for OPEN is program, DD Statement, and DSCB. > >If memory serves me right, the JFCB is built by allocation long before OPEN. >It contains a) the dcb parms from the DD (or SVC 99), and b) data from the >DSCB for all fields not specified on the DD. b) happens only for existing data >sets, of course. > When is the JFCB populated for an SL tape with the DEFER option, but attributes not specified in JCL or SVC 99?
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