On Aug 29, 2014, at 11:43 PM, retired mainframer wrote:
The ACS routines once existed in source somewhere. When they are
compiled into an SCDS the DSN and member names are saved in the
SCDS also. However, nothing prevents them from being modified
after compilation. (This is no different than any other source
library. It is a management responsibility, not the "compiler's",
to insure that a copy of the source corresponding to the current
"object" module is available for reference and future modification.)
If your sysprog is doing his job, he can tell you where the current
source modules are or give you a copy. Since your dataset is not
SMS managed, only the DATACLAS routine has significance. Once you
know which data class was assigned, you will need to get the
attributes specified by that class (probably also from your
sysprog). If you have the proper authority, you can acquire this
information for yourself from ISMF.
I answered off the top of my head and it may be incorrect.
I understood Paul's question to be why the blocksize and the
secondary question why did the system allocate the space it did.
Somewhere in my past memories (and its been discussed on here a
little) was a default geometry of 3380 NOT 3390 as you would expect.
My memory is going here but IIRC its an easy fix but where to find it
is another matter.
The issue (larger) may be if it were to change would it screw up
"other" allocations and I think IBM thinks so or they would have
changed the default a few years ago.
I would have expected them to do it in 2.1 as it was a major release
but I suspect that its buried so well even IBM forgot about it.
Ed
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