What is the difference between sb37,se37,sd37 each?

Answer Posted / reddy

Assume that Space(Cyl,(15,15),Rlse)

SB37 - If JES try to allocate 15 Cyl primary space if it
fails to allocate then it will throw B37 error.

SE37 - Once JES allocates 15 CYL of primary space start the
process of writing data then Primary is full then it will
allocate 15 extens of seconday. 15 extents of secondary is
not sufficient then it will throw that extents are full,E37
error.

SD37 - I am not sure about this but my assuption is D37
occurs because you ran out of your primary space allocation
and didn't specify a secondary amount

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