IBM DS8880 Version 8 Release 5.3 Introduction and Planning Guide IBM GC27-8525-18 Note Before using this information and the product it supports, read the information in “Safety and environmental notices ” on page 196 and “Notices” on page 195. This edition applies to version 8, release 5, modification 3 of IBM® DS8000® and to all subsequent releases and modifications until otherwise indicated in new editions. This edition replaces GC27-8525-17. © Copyright International Business Machines Corporation 2004, 2019. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents About this book....................................................................................................vii Who should use this book.......................................................................................................................... vii Conventions and terminology.................................................................................................................... vii Publications and related information.........................................................................................................vii IBM Publications Center..............................................................................................................................xi Feedback.....................................................................................................................................................xii Summary of changes .......................................................................................... xiii Chapter 1. Overview.............................................................................................. 1 Machine types.............................................................................................................................................. 3 Hardware......................................................................................................................................................4 System types.......................................................................................................................................... 6 Storage enclosures...............................................................................................................................19 Management console........................................................................................................................... 20 Ethernet switches.................................................................................................................................20 Processor nodes...................................................................................................................................20 I/O enclosures...................................................................................................................................... 21 Power....................................................................................................................................................21 Functions....................................................................................................................................................21 Logical configuration..................................................................................................................................25 Logical configuration with DS8000 Storage Management GUI...........................................................25 Logical configuration with DS CLI........................................................................................................ 26 RAID implementation...........................................................................................................................28 Logical subsystems.............................................................................................................................. 29 Allocation methods.............................................................................................................................. 30 Management interfaces.............................................................................................................................31 DS8000 Storage Management GUI......................................................................................................31 DS command-line interface ................................................................................................................ 31 DS Open Application Programming Interface .................................................................................... 32 RESTful API.......................................................................................................................................... 32 IBM Spectrum Control..........................................................................................................................33 IBM Copy Services Manager................................................................................................................ 33 Supported web browsers...........................................................................................................................34 Chapter 2. Hardware features.............................................................................. 37 Storage complexes.................................................................................................................................... 42 Management console.................................................................................................................................42 Hardware specifics.................................................................................................................................... 42 Storage system structure..................................................................................................................... 43 Disk drives and flash drives..................................................................................................................43 Drive maintenance policy.....................................................................................................................44 Host attachment overview................................................................................................................... 44 I/O load balancing......................................................................................................................................46 Storage consolidation................................................................................................................................ 46 Count key data........................................................................................................................................... 47 Fixed block................................................................................................................................................. 47 T10 DIF support................................................................................................................................... 47 Logical volumes......................................................................................................................................... 48 Allocation, deletion, and modification of volumes..............................................................................48 iii LUN calculation.......................................................................................................................................... 49 Extended address volumes for CKD..........................................................................................................50 Quick initialization......................................................................................................................................50 Chapter 3. Data management features................................................................. 51 Transparent cloud tiering...........................................................................................................................51 Dynamic volume expansion.......................................................................................................................52 Count key data and fixed block volume deletion prevention ...................................................................53 Thin provisioning........................................................................................................................................53 ESE capacity controls for thin provisioning......................................................................................... 53 IBM Easy Tier............................................................................................................................................. 54 VMware vStorage API for Array Integration support ............................................................................... 57 Performance for IBM Z ..............................................................................................................................58 Copy Services.............................................................................................................................................60 Disaster recovery through Copy Services............................................................................................ 67 Resource groups for Copy Services scope limiting............................................................................