IEC ISO ISO/EC17760-102 Edition 1.02016-03 INTERNATIONAL STANDARD colour inside Information technology - AT Attachment Part 102: ATA/ATAPI Command Set - 2 (ACS-2) ISO/IEC 17760-102:2016-03(en International Organization for Standardization vided by IHS u No reproductin working pen mitted without license from IHS THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright @ 2016 ISO/IEC, Geneva, Switzerland or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IEC's member National Committee in the country of the requester. If you have any questions about below oryourlocal IEC memberNational Committeeforfurther information. IEC Central Office Tel.: +41 22 919 02 11 3, rue de Varembé Fax:+41229190300 CH-1211 Geneva 20 [email protected] Switzerland www.iec.ch Aboutthe IEC 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 IECCatalogue-webstore.iec.ch/catalogue Electropedia-www.electropedia.org The stand-alone application for consulting theentire The world's leading online dictionary of electronic and bibliographical information on IEC International Standards, electrical terms containing 20 o00 terms and definitions in Technical Specifications, Technical Reports andother English and French, with equivalent terms in 15 additional documents. Available for PC, Mac OS, Android Tablets and languages.Also known as the International Electrotechnical iPad. Vocabulary (IEV)online. IECpublicationssearch-www.iec.ch/searchpub IECGlossary-std.iec.ch/glossary The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and varietyof criteria (referencenumber, text, technical French extracted from the Terms and Definitions clause of committee,...). It also gives information on projects, replaced IEC publications issued since 2002.Some entries have been andwithdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and CISPR. IEC Just Published - webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published IEC Customer Service Centre - webstore.iec.ch/csc details all new publications released. Available online and If you wish to give us your feedback on this publication or also once a month by email. need further assistance,pleasecontact the CustomerService Centre: [email protected]. International Organization for Standardization Licensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS under lic No reproduction or networking permitted without license from IHS IEC ISO SO/EC 17760-102 Edition 1.02016-03 INTERNATIONAL STANDARD colour inside Information technology - AT Attachment - Part 102: ATA/ATAPI Command Set - 2 (ACS-2) INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 35.200 ISBN 978-2-8322-3214-9 Warning! Make sure that you obtained this publication from an authorized distributor. International Organization for Standardization Licensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 ited without license from IHS ISO/IEC17760-102:2016@ISO/IEC2016 -2- Contents FOREWORD. 15 INTRODUCTION 1 Scope 2 Normative references .. .19 3 Terms, definitions, abbreviations, and conventions .20 3.2 Symbols and abbreviations ..28 3.2.1 Abbreviations ..28 3.2.2 Units.. 3.2.3 Symbols 30 3.2.4 Mathematical operators 3.3 Conventions ... ..30 3.3.1Overview 30 3.3.2 Precedence .31 .31 3.3.4 Keywords . ..32 3.3.5 Numbering 33 3.3.7 Number range convention 34 3.3.8 State diagram conventions .34 3.3.9 Byte, word, DWord, and QWord Relationships .35 3.3.10 ATA string convention . ..36 3.3.11 Offset Convention ..37 4 Feature set definitions .... 4.1Overview. ..38 4.2Generalfeatureset ..38 4.3 The PACKET feature set . ..39 4.3.1 Overview .. 39 4.3.2 Identification of PACKET feature set devices 4.3.3 Signature for ATAPI devices .39 4.3.4 The PACKET comman