You listed the only two things supported by IBM in its operating system. There is also an unknown number of user applications with files that have keys, which could be BSAM, BDAM, or BPAM (PDS with keys in its members and not just in its directory). IBM no longer supports ISAM, but there may still be some ISAM files that are being used somehow. And long, long ago the operating system used a dataset named PASSWORD that was unblocked with keys. The ancient system catalog structure with 8-byte keys has been replaced by VSAM structures.
Bill Fairchild -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of R.S. Sent: Tuesday, February 07, 2012 3:49 PM To: [email protected] Subject: Re: Why can't the track format be changed? (was: Physical record size query) Well... The only supported things that still use K from CKD are: 1. PDS (not PDSE) directory blocks. As documentation says PDS dir block is 256 bytes long, but there is also 8-byte KEY. 2. VTOC. AFAIR 44-byte KEY is part of 140-byte VTOC record. AND NOTHING ELSE! -- Radoslaw Skorupka ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
