John, I'm not sure what you mean by "general use."
For HDS Business Continuity Manager software some customers will allocate a small volume for the command devices (let's say 10 cyls), often using the odd cyls left over on a Parity Group after formatting a bunch of common sized volumes (-3, -9, -27, etc). They are also handy for JES2 Checkpoints, RACF Primary/Secondary, etc. EMC pushed the idea decades ago with the hypervolume concept. The various vendor thin provisioning capabilities may be reducing the frequency of this approach, as you can use the whole Parity Group for the pool, allocate a 3390-A in the pool, and then just use a few Cyls for your JES2 Checkpoint. Iceberg/RVA users will be familiar with this. Ron -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Steve Beaver Sent: Tuesday, June 28, 2016 6:37 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: [Bulk] Re: [IBM-MAIN] Minimum Volume Sizes in the Wild The smallest I've seen is a MOD3. And that is just because it had a CAT on it Steve -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Al Loeffler Sent: Tuesday, June 28, 2016 8:32 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Minimum Volume Sizes in the Wild I use 3390-27 for z/OS and other software installation, but I also use other sizes (3390-1, 3390-3, 3390-9, 3390-54) for operational and user datasets. Al Loeffler -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of John Eells Sent: Tuesday, June 28, 2016 9:19 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Minimum Volume Sizes in the Wild What is the *smallest* volume size everyone sees in general use? For example, will we create any problems if we assume that "everyone" has or can define at least a 3390-9 size volume these days? What if we chose 3390-27? -- John Eells IBM Poughkeepsie ee...@us.ibm.com ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
