Front cover ABCs of IBM z/OS System Programming Volume 3 Jose Gilberto Biondo Jr. Redbooks International Technical Support Organization ABCs of IBM z/OS System Programming Volume 3 January 2018 SG24-6983-04 Note: Before using this information and the product it supports, read the information in “Notices” on page ix. Fifth Edition (January 2018) This edition applies to version 2 release 3 of IBM z/OS (product number 5650-ZOS) and to all subsequent releases and modifications until otherwise indicated in new editions. © Copyright International Business Machines Corporation 2004, 2018. All rights reserved. Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Notices . ix Trademarks . .x Preface . xi The team who wrote this book . xi Now you can become a published author, too! . xii Comments welcome. xii Stay connected to IBM Redbooks . xiii Chapter 1. DFSMS introduction . 1 1.1 Introduction to DFSMS . 2 1.1.1 DFSMS components. 2 1.2 DFSMSdfp base element . 3 1.2.1 Managing storage . 3 1.3 DFSMSdss optional feature . 5 1.4 DFSMSrmm optional feature. 5 1.4.1 Library management . 5 1.4.2 Shelf management . 6 1.4.3 Volume management . 6 1.4.4 Data set management. 6 1.5 DFSMShsm optional feature . 6 1.5.1 Storage and space management . 6 1.5.2 Tape mount management. 7 1.5.3 Availability management . 7 1.6 DFSMStvs optional feature . 7 1.6.1 VSAM record-level sharing . 7 1.6.2 Recoverable resource management services. 8 Chapter 2. Data set basics . 9 2.1 Data sets on storage devices . 10 2.1.1 Storage devices . 10 2.1.2 DASD volumes . 10 2.1.3 Tape volumes . 10 2.2 Data set types . 11 2.2.1 Non-VSAM data sets . 11 2.2.2 VSAM data sets . 12 2.2.3 z/OS UNIX files . 13 2.2.4 Object data sets . 14 2.2.5 Other data set attributes . 15 2.3 Data set striping . 17 2.3.1 Physical sequential and VSAM data sets . 18 2.4 Accessing your data sets . 19 2.4.1 Accessing cataloged data sets . 20 2.4.2 Accessing uncataloged data sets . 21 2.5 VTOC and DSCBs . 21 2.5.1 Data set control block . 21 2.5.2 VTOC index . 21 2.5.3 Creating VTOC and VTOC Index . 22 © Copyright IBM Corp. 2004, 2018. All rights reserved. iii Chapter 3. Extended address volumes . 23 3.1 Traditional DASD capacity . 24 3.1.1 Serialization granularity. 24 3.1.2 DASD virtual visibility . 25 3.1.3 Multiple allegiance . 25 3.1.4 Parallel access volume . 25 3.1.5 HyperPAV feature . 26 3.2 Extended access volumes . 27 3.2.1 3390 Model A . 27 3.2.2 EAV volumes architecture. 28 3.2.3 EAS eligible data sets . 29 3.2.4 EAS non-eligible data sets . 30 3.2.5 Dynamic volume expansion . 30 3.3 EAV and IGDSMSxx parmlib member . 31 3.3.1 IGDSMSxx USEEAV parm . 31 3.3.2 IGDSMSxx BreakPointValue. 31 3.4 EATTR attribute . 32 3.5 Migration assistance tracker . 33 Chapter 4. Storage management software . 35 4.1 Overview of DFSMSdfp utilities. 36 4.1.1 System utility programs. 36 4.1.2 Data set utility programs . 36 4.2 DFSMSdfp access methods . ..