I am in error. I confused the data lenfgth field and key length fields
in my explanation. The field lengths are the same, but I reversed the order.
Also, in Dave's post I interpreted "lst" as "first", rather than "last".
Spent too many years typing on a real typewriter, which normally has no
digit for one.
(Eating humble pie) :-)
Rick
-------------------------------------------------------------------------
Rick Fochtman wrote:
------------------------------------<snip>-----------------------------------
Determine what track the dataset was allocated to then run this
utility specifying the first track of the dataset.
//DFDSS EXEC PGM=ADRDSSU //volume DD
VOL=SER=volume,UNIT=3390,DISP=SHR //SYSPRINT DD
SYSOUT=* //SYSIN DD
* PRINT
TRACKS(X'00xxx',X'0000',X'00xxx',X'0000') -
INDDNAME(volume)
Here is sample:
ADR006I (001)-STEND(01), 2010.288 14:52:47 EXECUTION BEGINS ***
TRACK(CCHH) 000D0000 R0 DATA 0000000000000000 COUNT
000D000001000000 ADR006I
(001)-STEND(02), 2010.288 14:52:47 EXECUTION ENDS
Note the lst 4 digits of COUNT are zero indicating a zero length block.
-------------------------------------------<unsnip>----------------------------------
Dave, your illustration is somewhat ambiguous. That count field should
be broken down to more detail. The fields are, from left to right:
Cylinder 000D
Track 0000
Record 01
Data length 0000
Key length 00
The data length of zero denotes the EOF mark. And if data length is
zero, the key length is irrelevant.
The EOF mark is signalled back through the interrupt hardware and
software as a UNIT EXCEPTION.
Rick
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