IEC ISO ISO/EC14776-453 Edition 1.02009-12 INTERNATIONAL STANDARD Information technology - Small computer system interface (ScSl)- Part 453: Primary commands-3 (SPC-3) ISO/IEC14776-453:2009(E) y IHS under without license from IHS Not for Resale THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright @ 2009 ISO/lEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form either IEC or IEC's member National Committee in the country of the requester. If you have any questions about ISo/lEc copyright or have an enquiry about obtaining additional rights to this IEC Central Office 3, rue de Varembé CH-1211Geneva20 Switzerland Email: [email protected] Web: www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendment might have been published. - Catalogue of IEC publications: www.iec.ch/searchpub The IEc on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,..). It also gives information on projects, withdrawn and replaced publications. - IEC Just Published: www.iec.ch/online news/justpub Stay up to date on all new IEc publications. Just Published details twice a month all new publications released. Available on-lineandalsobyemail. - Electropedia: www.electropedia.org The world's leading online dictionary of electronic and electrical terms containing more than 20 o00 terms and definitions in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical Vocabulary online. • Customer Service Centre: www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need further assistance,please visit the Customer Service Centre FAQ or contact us: Email: [email protected] Tel.: +4122919 02 11 Fax:+4122 9190300 Copyright International Organization for Standardization itted without license from IHS Not for Resale IEC ISO ISO/IEC14776-453 Edition 1.02009-12 INTERNATIONAL STANDARD Information technology - Small computer system interface (Scsl) - Part 453: Primary commands-3 (SPC-3) INTERNATIONAL ELECTROTECHNICAL COMMISSION PRICE CODE XK ICS 35.200 ISBN 2-8318-1070-9 by IHS under lo r Not for Resale aadizao No reproductic neworkingmitedwithout licenefrmH Not for Resale - 3 - 14776-453 @ ISO/IEC:2009(E) Contents Page Introduction 23 1Scope. 24 2 Normative references... .25 2.1 General..... 2.2 Approved references 25 2.3 IETF References ... 27 3 Terms and definitions, symbols, abbreviations and conventions... 28 3.1 Terms and definitions . 28 3.2 Acronyms.... .39 3.3 Keywords.... 40 3.4Conventions. 41 3.5 Bit and byte ordering . 42 3.6 Notation conventions . .43 3.6.1 Notation for byte encoded character strings 43 3.2 Notation for procedure calls......... 44 3.6.3 Notation for state diagrams 45 3.6.4 Notation for binary power multipliers . 45 4 General Concepts .. 46 4.1 Introduction... .46 4.2 The request-response model.. 46 .46 4.3.1 CDB usage and structure ... 46 4.3.2 The fixed length CDB formats 47 4.3.3 The variable length CDB formats . 49 4.3.4 Common CDB fields. 50 4.3.4.1 Operation code ... .50 4.3.4.2 Service action .... 51 4.3.4.3 Logical block address ..... 51 4.3.4.4 Transfer length 51 4.3.4.5 Parameter list length.... 52 4.3.4.6 Allocation length ..... 52 4.3.4.7 Control... 52 4.4 Data field requirements ... 52 4.4.1 AsCll data field requirements.... 52 4.4.2 Null data field termination and zero padding requirements 52 4.5 Sense data.. 53 4.5.1 Sense data introduction.. 53 4.5.2 Descriptor format sense data .. 54 4.5.2.1 Descriptor format sense data overview .. 54 4.5.2.3 Command-specific infor