> -----Original Message-----
> From: IBM Mainframe Discussion List On Behalf Of Paul Gilmartin
>
> On Fri, 12 Sep 2008 10:18:08 -0500, Chase, John wrote:
> >
> >In V(B) records the RDW (Record Descriptor Word) is a part of the
> >record, so its length is a part of the record length. You
> can actually
> >put any value in there from 5 (one data byte) through 32756
> (32752 data
> >bytes), ...
>
> 3.1.3.1.2 "z/OS V1R7.0 DFSMS Using Data Sets"
>
> 3.1.3.1.2 Record Descriptor Word (RDW)
>
>
>
> A variable-length logical record consists of a record
> descriptor word (RDW
> ) followed by the data. The record descriptor word is a 4
> byte field describing the
> record. The first 2 bytes contain the length (LL) of the
> logical record (including the
> 4 byte RDW). The length can be from 4 to 32 760.
>
> I believe the minimum is 4, but I believe you are correct about 32756.
> Is it RCF time? Or is there some format that permits blocks
> >32760, or that lacks a BDW?
You can specify lrecl=32760 in RECFM=V or RECFM=VBS datasets, but for VB
it's 32756 because you have to leave 4 bytes for the BDW.
-jc-
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