Answer / guest

Datasets must be of the same type (disk or tape), All
datasets must have the same logical record length, The
dataset with the largest blocksize must be listed first.

Answer / sandy lofton

1. The dataset with the largest blocksize must be listed
first.
2. If concatenated datasets are libraries and contain same
name members, the first one found will be used.
3. Order is important: Disk first, tape second, cards
third.

Answer / muttaiah

1) The dataset should be of same type meaning if you are
concatenating a PDS then other ds should be pds only & ps-
Ps)
2) They should have same format and LRECL
3) If the dataset's have diff blocksize then the dataset
with Largest block size should be coded first
4) All the datasets should reside on the same unit(device).
however the volume serial number can differ
5) we can concatenate 16 PDS & 255 PS files

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