ANSI-INCITS-329-2000.pdf

ANSI INCITS 329-2000 (formerly ANSI NCITS 329-2000) for Information Technology Magnetic Tape Cartridge for Information Interchange 0.50 in (12.65 mm), Serial Serpentine, 208-Track, 85 938 bpi (3383 bpmm) DLT5 Format Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 04/29/2007 19:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 04/29/2007 19:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI NCITS 329-2000 American National Standard for Information Technology Magnetic Tape Cartridge for Information Interchange 0.50 in (12.65 mm), Serial Serpentine, 208-Track, 85 938 bpi (3383 bpmm) DLT5 Format Secretariat Information Technology Industry Council Approved March 15, 2000 American National Standards Institute, Inc. ® Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 04/29/2007 19:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgement of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made towards their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. American National Standard Published by American National Standards Institute, Inc. 11 West 42nd Street, New York, NY 10036 Copyright © 2000 by Information Technology Industry Council (ITI) All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of ITI, 1250 Eye Street NW, Washington, DC 20005. Printed in the United States of America CAUTION: The developers of this standard have requested that holders of patents that may be re- quired for the implementation of the standard disclose such patents to the publisher. However, nei- ther the developers nor the publisher have undertaken a patent search in order to identify which, if any, patents may apply to this standard. As of the date of publication of this standard, following calls for the identification of patents that may be required for the implementation of the standard, notice of one or more such claims has been received. By publication of this standard, no position is taken with respect to the validity of this claim or of any rights in connection therewith. The known patent holder(s) has (have), however, filed a statement of willingness to grant a license under these rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to ob- tain such a license. Details may be obtained from the publisher. No further patent search is con- ducted by the developer or publisher in respect to any standard it processes. No representation is made or implied that this is the only license that may be required to avoid infringement in the use of this standard. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 04/29/2007 19:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- i Contents Page FOREWORD.vi 1INTRODUCTION 1 1.1Scope. 1 1.2Purpose 1 1.3Conformance 2 1.4Dimensions 2 2NORMATIVE REFERENCES 2 3DEFINITIONS 2 4ENVIRONMENT AND SAFETY. 5 4.1Cartridge and Tape Testing Environment 5 4.2Cartridge Operating Environment 5 4.3Cartridge Storage Environment 6 4.4Transportation 6 4.5Safety. 6 4.5.1Safeness 6 4.5.2Flammability. 6 5TAPE MECHANICAL, ELECTRICAL AND MAGNETIC REQUIREMENTS 6 5.1Material 6 5.2Tape length 6 5.3Width 6 5.4Total thickness . 7 5.5Discontinuity. 7 5.6Longitudinal Curvature. 7 5.6.1Requirement. 7 5.6.2Procedure. 7 5.7Out-Of-Plane Distortions 7 5.8Cupping 7 5.8.1Requirement. 7 5.8.2Procedure. 7 5.9Coating Surface Roughness 8 5.9.1Back Coating Surface Roughness . 8 5.9.2Magnetic Coating Surface Roughness. 8 5.10Coating Adhesion. 8 5.10.1Requirement. 8 5.10.2Procedure. 8 5.11Layer-to-Layer Adhesion 8 5.11.1Requirements. 8 5.11.2Procedure. 8 5.12Youngs Modulus 9 5.12.1Requirement. 9 5.12.2Procedure. 9 5.13Flexural Rigidity 9 5.13.1Requirement. 9 5.13.2Procedure. 9 5.14Tensile Yield Force 10 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 04/29/2007 19:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- ii Page 5.14.1Requirement. 10 5.14.2Procedure. 10 5.15Electrical Resistance of the Recording Surface. 10 5.15.1Requirement. 10 5.15.2Procedure. 10 5.16Electrical Resistance of the Back Surface . 10 5.16.1Requirement. 10 5.16.2Procedure. 10 5.17Inhibitor Tape. 11 5.18Abrasivity 11 5.18.1Requirement. 11 5.18.2Procedure. 11 5.19Tape and Leader Opacity. 11 5.19.1Requirements. 11 5.19.2Procedure. 11 5.20Friction Coefficient . 12 5.20.1Requirement. 12 5.20.2Procedure. 12 5.21Pre-Record Condition. 12 6TAPE MAGNETIC-RECORDING PERFORMANCE 12 6.1Typical Field. 13 6.2Signal Amplitude 13 6.3Resolution 13 6.4Overwrite 13 6.4.1Requirement. 13 6.4.2Procedure. 13 6.5Peak Shift. 13 6.5.1Requirement. 14 6.5.2Procedure. 14 6.6Self Erasure . 14 7TAPE QUALITY . 14 7.1Missing pulses 14 7.1.1Requirement. 14 7.2Missing pulse zone. 14 7.2.1Requirement. 14 8MECHANICAL SPECIFICATIONS OF THE TAPE CARTRIDGE 14 8.1Cartridge Case Label Areas. 15 8.2Cartridge Positioning Planes 15 8.2.1Cartridge Positioning Features. 15 8.2.2Operating Position 15 8.2.3Reel to Drive Hub Interface 15 8.3Tape Cartridge Case Material 15 8.4File-Protect Mechanism . 15 8.5Reel Lock Mechanism 16 8.6Tape Winding. 16 8.7Winding Tension 16 8.8Tape-Reel Diameter. 16 8.9Tape-Reel Moment of Inertia . 16 8.10Leader Attachment. 16 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 04/29/2007 19:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- iii Page 8.11Cartridge Leader Position.16 8.12Leader Retract Velocity16 8.13Tape Exit Angles 16 8.14Tape Access Door17 8.15Tape Position Holes .17 9RECORDING17 9.1Method of Recording17 9.2Code Conversion17 9.3Physical Recording Density17 9.4Bit-Cell Length17 9.4.1Average Bit-Cell Length17 9.4.2Long-Term Average Bit-Cell Length.17 9.4.3Short-Term Average Bit-Cell Length 17 9.5Read Signal Amplitude.17 9.6Azimuth.17 9.7Channel Skew 18 10TAPE FORMAT18 10.1Reference Edge of Tape 18 10.2Direction of recording .18 10.3Tape layout.18 10.4Calibration/Directory Area 18 10.4.1Scratch Area.18 10.4.2Guard Band Areas18 10.4.3Guard Band Area G118 10.4.4Calibration Tracks Area18 10.4.5Guard band area G2.19 10.4.6Tape Directory Area .19 10.4.7Guard band area G3.20 10.5Data Area .20 10.5.1Physical Tracks 20 10.5.2Logical Tracks 20 10.5.3References of Track Base20 10.5.4Width of Tracks.20 10.5.5Forward Tracks.20 10.5.6Reverse tracks21 11FORMAT OF DATA21 11.1General.21 11.2Data Bytes21 11.2.1User Bytes21 11.2.2Pad Bytes.21 11.2.3Map Entry Bytes.22 11.3Blocks:22 11.3.1Block Types:.22 11.3.2Data Blocks: .22 11.3.3Filler Blocks22 11.3.4End of Track Blocks (EOTR)22 11.3.5End of Data Blocks (EOD)22 11.3.6ECC Blocks: .23 11.4Entity.23 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 04/29/2007 19:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- iv Page 11.5Envelope 23 12FORMAT AND CONTENT OF BLOCK STRUCTURES 23 12.1Preamble 23 12.2Sync. 23 12.3Data Field. 23 12.3.1Page Layout. 24 12.3.2Pad Bytes. 24 12.3.3MAP Entries. 24 12.3.4Block Format 24 12.4EDC 24 12.5Control Field 1 25 12.5.1Reserved 25 12.5.2Format 25 12.5.3Tape Mark 25 12.5.4Compression 25 12.5.5Sequential number of the record blocks. 25 12.5.6Object Number. 25 12.5.7Sequential File Mark Number. 25 12.5.8Sequential File Mark Offset 26 12.5.9Block Type . 26 12.5.10 Early Warning. 26 12.5.11 Envelope size 26 12.5.12 Envelope BackLink. 26 12.6Control Field 2 26 12.6.1 Entity Offset 26 12.6.2 Envelope first object number 26 12.6.3 Block Offset 26 12.6.4Entity Size 27 12.6.5First block of a record 27 12.6.6Entity Number 27 12.6.7Envelope number. 27 12.6.8Random Tag 27 12.6.9K Bit 27 12.6.10 Logical Track Number 27 12.7Cyclical Redundancy Check (CRC). 27 12.7.1 Page CRC 27 12.7.2 Block CRC 27 12.8Postamble 28 13FORMAT OF ENTITY 28 14FORMAT OF ENVELOPE 28 15ERROR HANDLING. 29 Tables 1RLL CODE CONVERSION 30 2DIMENSIONS (CUSTOMARY AND SI) FOR FIGURES . 31 3NOMINAL LOCATION OF PHYSICAL TRACKS CENTERLINES. 35 4BLOCK FORMAT. 36 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 04/29/2007 19:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- v Page 5CONTENTS OF MAP ENTRIES 37 6CONTROL FIELD 1 CONFIGURATION.38 7CONTROL FIELD 2 CONFIGURATION.39 Figures 1TAPE RESISTANCE MEASUREMENT ELECTRODES40 2TAPE RESISTANCE MEASUREMENT CIRCUIT41 3WAVEFORM OF PEAKSHIFT .42 4MEASUREMENT OF ABRASIVITY .43 5DRAWING COORDINATE SYSTEM .44 6TAPE CARTRIDGE45 7CARTRIDGE - BOTTOM VIEW46 8REEL LOCKS AND NOTCHES47 9CARTRIDGE - OPERATING POSITION48 10CARTRIDGE - SIDE VIEW.49 11CARTRIDGE - CROSS SECTION .50 12CARTRIDGE REEL ASSEMBLY51 13CARTRIDGE LEADER.52 14POSITION OF CARTRIDGE LEADER.53 15TAPE/LEADER EXIT ANGLES54 16FORMAT OF CALIBRATION AREA.55 17CALIBRATION TRACK POSITION56 18FORMAT OF DATA AREA.57 19ECC BLOCKS 58 Annexes APRE-RECORD CONDITION AND MAGNETIC MOMENT MEASUREMENT60 BRECOMMENDATIONS FOR TRANSPORTATION .61 CTAPE CARTRIDGE HANDLING GUIDELINES63 DRECOMMENDATIONS ON TAPE DURABILITY.64 EBIBLIOGRAPHY.65 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 04/29/2007 19:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- vi Foreword(This foreword is not part of American National Standard ANSI NCITS 329-2000.) This standard presents the minimum requirements for the organization and location of magnetically encoded data on a 0.50 inch (12.65 mm) wide magnetic tape car- tridge to allow parties that comply with these requirements to interchange information reliably. The standard applies to 208-track, 85 938 bpi (3 383 bpmm), serial serpen- tine, 2,7 RLL recording mode tape drives that operate in the streaming mode. This format is called the DLT5. The advantage of using the format described in this standard is that it provides more than 3.5 times the data capacity when compared to American National Standard for Information Technology Magnetic Tape Cartridge for Information Interchange, 0.50 in (12.65 mm), Serial Serpentine, 128-Track, 62 500 bpi (2 460 bpmm), DLT3 For- mat, ANSI X3.282-1996; 6 times the capacity of American National Standard for In- formation Technology Magnetic Tape Cartridge for Information Interchange, 0.50 in (12.65 mm), Serial Serpentine, 112-Track, 42 500 bpi (1 673 bpmm) DLT2 Format, ANSI X3.266-1996. The impetus to develop this standard was the requirement for higher capacity tape drives to provide backup for the increasingly greater capacities of the fixed media disk drives being used with information processing systems. Technical Committee NCITS B5 on Digital Magnetic Tape developed this standard. This group consists of experienced and qualified specialists on the recording of digi- tal information on magnetic tape. In the development of this standard, careful consid- eration was given to current practices, existing equipment and supplies, achieving the broadest possible acceptance, and providing a basis for future improvement in the use of the medium. This standard contains five annexes. Annex A is part of this standard and is norma- tive. Annexes B, C, D and E are informative and are not considered part of this stan- dard. Requests for interpretation, suggestions for improvement or addenda, or defect re- ports are welcome. They should be sent to National Committe for Information Tech- nology Standards (NCITS), ITI, 1250 Eye Street, Suite 200, Washington, DC 20005. This standard was processed and approved for submittal to ANSI by NCITS. Com- mittee approval of this standard does not necessarily imply that all committee mem- bers voted for its approval. At the time it approved this standard, NCITS had the following members: Ms. Karen Higgenbottom, Chairman Dave Michael, Vice Chairman Ms. Monica Vago, NCITS Secretary Organization RepresentedName of Representative Apple Computer Inc David Michael Mr. Jerry Kellenbenz (Alt.) Bull HN Information Systems Inc Randall Kilmartin Compaq Computer Corporation . Scott Jameson Stephen Heil (Alt.) Hewlett-Packard Company. Karen Higgin