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[Phantom]

What is the difference b/w the DCB which is available in JFCB control block and that available in the DEB control block. I recently downloaded a COBOL program to read the job information (Jobname, step,...,LRECL, BLKSIZE, VOL, RECFM, DSORG...). The author had adopted the following procedure to retrieve the RECFM, LRECL, BLKSIZE, DSORG... for all the datasets.

PSA -> TCB -> TIOT -> JFCB -> DEB -> DCB.

When the DCB (DSNAME, DSORG, RECFM, LRECL, BLKSIZE, VOL...) is already available in JFCB control block why should we take the overhead of reading the DEB control block and then access the DCB from there ? What is the reason for this redundancy ? Does the DEB block contain some additional information that is not available in JFCB ?

Also, could someone please provide me the layout for DEB control block ? (The DEB Map). I searched the Data Area manuals for the DEB control block but didn't find the information that I was looking for.

Thanks a lot,
Phantom

[kolusu]

Phantom,

Check this link for Data Extent Block (DEB) Fields

Hope this helps...

Cheers

Kolusu
_________________
Kolusu
www.linkedin.com/in/kolusu

[Phantom]

Thanks for the immediate response Kolusu,

I will look at the document and get back to you,

Thanks a lot,

Phantom

[bablack]