At 21:09 -0500 on 10/06/2012, Paul Gilmartin wrote about Re: Zero
length records outlawed! (Again.):
>Note that when you are writing to DASD, the block size is restricted
to however much room is left on the track so the last block on a
track is shorter than the defined Blocksize.
I've been told elsewhere that only Binder (Linkage Editor?) performs
such track balancing. Otherwise access methods will start a new
track whenever there is insufficent space in the current track for
BLKSIZE bytes. This could apply as well for RECFM=VB as for
RECFM=VBS. This provides the rationale for SDB's choice of 32760
when RECFM=U and half track for any other RECFM (3380/3390).
So you are saying that to avoid the need to keep track of the
remaining space on the track the code just wastes space when writing
VBS (and VB) records.
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