<snip> ... I think PDSE on LNKLST *may have* secondary extents and it is NOT bad practise like in case of PDS. </snip>
A PDSE counts as having only one extent. That correlates to the DEB for the opened concatenation having only one extent entry for a PDSE. I conclude that the information about other extents is "elsewhere". <snip> What happens when a program reads a member with pages in an extent not reported in an outdated DEB? </snip> Perhaps this translates to ...with pages in an extent not reported in an outdated "elsewhere". If there can be such outdated data for PDSE, then one would guess that the answer is the same thing that happens for a PDS. I don't know if there can or cannot be. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
