CVOL had the restriction that if you have a DSN=HLQ.Q2 you can't create DSN=HLQ.Q2.Q3.
On Sat, May 14, 2022 at 5:59 AM Leonard D Woren <[email protected]> wrote: > > BRODCAST with its 1 byte keys is probably the only data set using > non-unique hardware keys. > > IIRC, the key values have the following meanings: > * (I think) header with pointers to the first system notice and the > first user directory blocks > * free (available) record > * system notice - operator SEND with SAVE > * user directory > * user mail - TSO SEND with SAVE > > Decades ago I heard that SYSCTLG/CVOL and PDS directories both had 256 > byte blocks with 8 byte keys because they used the same code for > processing. I have no idea whether that was true. > > /Leonard > > Seymour J Metz wrote on 5/13/2022 5:43 AM: > > * BDAM > > * ISAM > > * PASSWORD > > * PDS directory > > * SYSCTLG/CVOL > > * SYS1.BRODCAST > > * VTOC > > > > What about QTAM and TCAM message queues? > > > > > > -- > > Shmuel (Seymour J.) Metz > > http://mason.gmu.edu/~smetz3 > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
