W dniu 2013-09-19 10:33, [email protected] pisze:
// EXEC PGM=IEFBR14
//DD1 DD DISP=(,CATLG),DSN=TEST,
// SPACE=(TRK,(1,0,0)),RECFM=F,LRECL=20,DSORG=PO
My output:
Organization . . . : PO
Record format . . . : F
Record length . . . : 20
Block size . . . . : 20
1st extent tracks . : 10000
Secondary tracks . : 0
Data set name type : PDS
Current Allocation
Allocated tracks . : 10,000
Allocated extents . : 1
Maximum dir. blocks : 0 *
Current Utilization
Used tracks . . . . : 0
Used extents . . . : 0
Used dir. blocks . : 0 *
Number of members . : 0 *
* Information is unavailable.
What's interesting is ISPF/PDF behavior. For allocations Pri>=10000 it always display the
information as above. For smaller allocations it ends with "I/O error" - "An I/O error
occurred while reading the PDS directory."
Interesting case:
9000,0 gives I/O error (but more than 1 extent is used)
9000,10 gives no error
9000,0 + CONTIG gives no error
8000,0 + CONTIG gives no error
7000,0 + CONTIG gives no error
6500,0 + CONTIG gives no error
6400,0 + CONTIG gives no error
...
6050,0 + CONTIG gives no error
6025,0 + CONTIG gives no error
6024,0 + CONTIG gives no error
6023,0 + CONTIG gives no error
stop here
6022,0 + CONTIG gives I/O error
6021 and less gives same error as well.
What's magic in 6022/6023 TRK ? I don't know.
Side note: Usually I'm trying to use PDSes with non-zero directory, as
they are more usable. ;-)))
--
Radoslaw Skorupka
Lodz, Poland
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