Years of rules enforced by tape management systems, extensive GDG use and "If you don't use catalog control, you get what you deserve" made this possible. I don't remember the SMS rules, but I'm pretty sure they required SL and catalog control. First passes didn't get all of them, but tape mount hate weeded out the rest quickly.
-----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Joel C. Ewing Sent: Tuesday, December 4, 2018 9:30 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Another IBM tape not for z/OS On 12/02/2018 07:55 PM, Rugen, Len wrote: > Batch tape should be dead, even if batch JCL still looks like tape is used. > One of my last SMS projects was to manage tape, redirecting almost all to SMS > disk. > > > Before employing any technique to convert all tape data sets to DASD, one should I hope first consider whether replacing a tape data set with a DASD data set is a reasonable act based on the application design. The one logical capability of a tape data set, even one using virtual tape, that is not normally associated with a DASD data set is the innate ability to continue to exist for hours, days, or even longer after a new data set with identical name has been created, depending on how tapes volumes are scratched. The use of tape could mean the application is depending on that retention as an implicit and essential part of recovery should programming errors or other disasters occur during application processing, especially if the problem is a subtle one that isn't caught immediately. Throwing out that capability without providing a suitable substitute is something you may live to regret. Joel C. Ewing -- Joel C. Ewing ---------------------------------------------------------------------- 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
