Brocade Mainframe Connectivity Solutions
PART 1: BROCADE MAINFRAME CHAPTER 2 CONNECTIVITY SOLUTIONS The modern IBM mainframe, also known as IBM zEnterprise, has a distinguished 50-year history BROCADEMainframe I/O and as the leading platform for reliability, availability, serviceability, and scalability. It has transformed Storage Basics business and delivered innovative, game-changing technology that makes the extraordinary possible, and has improved the way the world works. For over 25 of those years, Brocade, MAINFRAME the leading networking company in the IBM mainframe ecosystem, has provided non-stop The primary purpose of any computing system is to networks for IBM mainframe customers. From parallel channel extension to ESCON, FICON, process data obtained from Input/Output devices. long-distance FCIP connectivity, SNA/IP, and IP connectivity, Brocade has been there with IBM CONNECTIVITY and our mutual customers. Input and Output are terms used to describe the SOLUTIONStransfer of data between devices such as Direct This book, written by leading mainframe industry and technology experts from Brocade, discusses Access Storage Device (DASD) arrays and main mainframe SAN and network technology, best practices, and how to apply this technology in your storage in a mainframe. Input and Output operations mainframe environment. are typically referred to as I/O operations, abbreviated as I/O. The facilities that control I/O operations are collectively referred to as the mainframe’s channel subsystem. This chapter provides a description of the components, functionality, and operations of the channel subsystem, mainframe I/O operations, mainframe storage basics, and the IBM System z FICON qualification process. STEVE GUENDERT DAVE LYTLE FRED SMIT Brocade Bookshelf www.brocade.com/bookshelf i BROCADE MAINFRAME CONNECTIVITY SOLUTIONS STEVE GUENDERT DAVE LYTLE FRED SMIT BROCADE MAINFRAME CONNECTIVITY SOLUTIONS ii © 2014 Brocade Communications Systems, Inc.
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