Front cover IBM i and Midrange External Storage Learn the architecture of Midrange Storage for IBM i as a client of VIOS Plan for the best performance of Midrange Storage for IBM i Implement Midrange Storage with Copy Services Hernando Bedoya Ingo Dimmer Jana Jamsek Thomas Penzkofer ibm.com/redbooks International Technical Support Organization IBM i and Midrange External Storage January 2009 SG24-7668-00 Note: Before using this information and the product it supports, read the information in “Notices” on page vii. First Edition (January 2009) This edition applies to IBM i 6.1. © Copyright International Business Machines Corporation 2009. 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 . vii Trademarks . viii Preface . ix The team that wrote this book . ix Become a published author . xi Comments welcome. xii Chapter 1. Introduction. 1 1.1 What is new. 2 1.2 Virtual I/O Server concepts . 3 1.2.1 VIOS virtual SCSI support . 4 1.2.2 Virtual Ethernet support . 5 Chapter 2. Midrange Storage architecture . 9 2.1 IBM DS3400 models and features . 10 2.1.1 DS3400 model types and specifications . 10 2.1.2 DS3400 optional features . 12 2.1.3 DS3400 architecture . 12 2.2 IBM DS4000 models and features . 14 2.2.1 IBM DS4700 models and features . 14 2.2.2 IBM DS4800 models and features . 20 2.3 IBM DS5000 models and features . 26 2.4 Positioning Midrange Storage . 32 2.5 RAID technology and spare drives . 36 2.6 User interfaces . 45 2.6.1 Storage Manager . 45 2.6.2 Script Editor . 49 2.6.3 SMcli . 50 2.7 Remote Support Manager. 54 2.7.1 RSM and Alert Manager . 54 2.7.2 Hardware and software requirements. 55 2.7.3 How RSM for Storage works. 56 2.7.4 RSM management interface . 58 2.7.5 RSM security considerations. 59 2.8 Logical storage architecture . 64 2.8.1 Arrays and logical drives. 64 2.8.2 Storage partitioning. 67 2.8.3 Controller ownership . 69 2.8.4 FlashCopy and Volume Copy . 70 2.8.5 Enhanced Remote Mirroring . 77 Chapter 3. IBM i Midrange Storage solution examples . 83 3.1 VIOS on IBM internal Drives . 84 3.2 VIOS on SAN Storage. 85 3.3 Dual VIOS with IBM i Mirroring . 86 3.4 Disaster Recovery with Enhanced Remote Mirroring . 87 Chapter 4. Planning for Midrange Storage . 89 © Copyright IBM Corp. 2009. All rights reserved. iii 4.1 Planning for IBM Midrange Storage series and models . 90 4.2 Planning for VIOS . 90 4.3 Planning for SAN connectivity. 91 4.3.1 Adapters, Fibre Channel protocols, distance . 91 4.3.2 Cables and connectors . 92 4.3.3 Switches and zoning . 92 4.3.4 Multipath . 93 4.4 Planning for capacity. 94 4.4.1 Disk drive capacities and spares. 95 4.4.2 RAID levels . 95 4.4.3 DACstore . 96 4.4.4 Usable capacity in Storage System . 96 4.4.5 Available capacity to IBM i partition . 97 4.5 Planning considerations for performance . 97 4.5.1 Disk drives in Midrange Storage . 97 4.5.2 RAID arrays . 98 4.5.3 Sector sizes . 98 4.5.4 Logical drives . 98 4.5.5 Adapters in VIOS and IBM i client. 100 4.6 Planning for backup and recovery. 100 4.6.1 Back up to physical tape drive in IBM i client partition . 100 4.6.2 Back up to virtual optical volume in VIOS . 101 4.6.3 Back up to virtual tape in System i partition . 102 4.7 Planning for Copy Services. 102 4.7.1 FlashCopy. 102 4.7.2 Enhanced Remote Mirroring . 104 4.7.3 Volume Copy . ..