On Mon, 17 Jun 2024 01:19:27 +0000, Seymour J Metz wrote:

>If you have to unload to 3330, then use BLKSIZE=13030 for SYSLMOD; IEBCOPY 
>doesn't support COPYMOD reblocking for load/unload.
> 
Has everyone noticed what a grievous design/philosophical blunder IBM
committed by exposing device characteristics to users?  The data should
appear identical to the user whether they are on a 3330, 339o, 3420-6,
cards, ... and it should be up to the OS to decide how to put them there.
OK.  You can't backspace a card punch, but most restrictions beyond
that are gratuitous.

-- 
gil

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