On Thu, 1 Jan 2026 21:49:34 -0500, Joseph Reichman wrote:
>    ...
>Since most snap DCB goes to DASD why have RECFM=VBA     VB would be good
>
The principle is "I/O abstraction".  The application (e.g. SNAP)
needn't care and shouldn't know whether a DD statement 
allocates a data set to DASD, printer, or tape.  The code is
the same.

(z/OS does this relatively well; CMS very poorly.)

-- 
gil

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