With essentially all z DASD being cached these days, a lot of the efficiency issues no longer apply, leaving space as more dominant.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of Paul Gorlinsky [p...@atsmigrations.com] Sent: Wednesday, November 23, 2022 12:55 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Bytes in a 3390 track Short block more efficient? Elaborate please. Space utilization and efficient are not necessarily the same. Latency issues vary a lot depending on the exact box being used for DASD. DS6K v DS8K. DS8K with rotating v solid-state ... QSAM v BPAM v BSAM v etc... General guidelines ... ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
