W dniu 2012-08-08 16:00, Paul Gilmartin pisze: > On Aug 8, 2012, at 06:06, R.S. wrote: >> >> .... BTW: your allocation request was >> illogical - you wanted to have 80-byte records and requested 1 byte. >> Such request has to be re-interpreted or canceled. ;-) >> > I believe the block specification is an average. As such, it's > not required to be a multiple of LRECL. If half the blocks are > 80 bytes and half are 160, an average of 120 is possible. > Granted, 1 can never occur, not even as an average. I suppose > allocation simply calculates the tracks necessary to hold the > requested number of 1-byte blocks plus gaps. It might be a > courtesy for allocation to issue a warning, but how much > validity checking should it be expected to perform? > > What about RECFM=VB? What's the smallest valid block? 9? > 8? 4? (That would be a BDW with no records.) Does "Using > Data Sets" allow this? I bet I could write one with BSAM; > I wonder how QSAM would handle reading it?
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