It also says:

3. If the BLKSIZE value is omitted or invalid, SMP/E uses a default of 3200.

So I would assume that it is looking at the blocksize prior to open time to verify that it is a valid size. Since 0 is sort of not really valid, it should default to 3200.

But you would have to figure after over a decade of SDB that somebody could have easily added a check for 0 and use that. Could be that the SMP/E developers don't beleive that SDB will generate a valid block size for FB/80?

[EMAIL PROTECTED] wrote:
I read:

# 4.41 "SMP/E V3R4.0 Reference" ___________________________________________________________________

4.41 SMPWRK1

   Notes:

   2. Do not specify BLKSIZE=0. SMP/E does not support system-determined
      block size (SDB) for this data set.

Why?  Would it be any better if the programmer specified explicitly
the same value that SDB would happen to choose?

-- gil

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