This IBMfi Redbooksfi publication is a detailed technical guide to the IBM System Storagefi  SAN Volume Controller (SVC), which is powered by IBM Spectrum™ Virtualize V8.2.1. IBM SAN Volume Controller is a virtualization appliance solution that maps virtualized  volumes that are visible to hosts and applications to physical volumes on storage devices.  Each server within the storage area network (SAN) has its own set of virtual storage  addresses that are mapped to physical addresses. If the physical addresses change, the  server continues running by using the same virtual addresses that it had before. Therefore,  volumes or storage can be added or moved while the server is still running. The IBM virtualization technology improves the management of information at the  block  level  in a network, which enables applications and servers to share storage devices on a network.  Jon Tate  is a Project Manager for IBM System Storage SAN  Solutions at the ITSO, San Jose Center. Before joining the  ITSO in 1999, he worked in the IBM Technical Support Center,  providing Level 2/3 support for IBM mainframe storage  products. Jon has 33 years of experience in storage software  and management, services, and support. He is an IBM  Certified IT Specialist, an IBM SAN Certified Specialist, and is  Project Management Professional (PMP) certified. He is also  the UK Chairman of the Storage Networking Industry  Association (SNIA). Jack Armstrong  is a Storage Support Specialist for IBM  Systems Group based in Hursley, UK. He joined IBM as part of  the Apprenticeship Scheme in 2012 and has built up 6 years of  experience working with Storage, providing support to  thousands of customers across Europe and beyond. He also  provides value-add work for IBM Enhanced Technical Support  Services, helping clients to expand and improve their storage  environments. Tiago Bastos  is a SAN and Storage Disk specialist for IBM  Brazil. He has over 17 years of experience in the IT arena, and  is an IBM Certified Master IT Specialist, as well as certified on  the IBM Storwizefi portfolio. He works on Storage as a Service  (SaaS) implementation projects, and his areas of expertise  include planning, configuring, and troubleshooting IBM System  Storage DS8000fi, Storwize V5000 and V7000, IBM  FlashSystemfi 900, SVC, and IBM XIVfi. ' Copyright IBM Corp. 2011, 2019. All rights reserved. xv This book was produced by a team of specialists from around the world working at the  International Technical Support Organization (ITSO), San Jose Center. Authors Preface