1、ANSI INCITS 329-2000(formerly ANSI NCITS 329-2000)for Information Technology Magnetic Tape Cartridge for InformationInterchange 0.50 in (12.65 mm), SerialSerpentine, 208-Track, 85 938 bpi (3383 bpmm)DLT5 FormatCopyright American National Standards Institute Provided by IHS under license with ANSI No
2、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSINCITS 329-2000American National Standardfor
3、Information Technology Magnetic Tape Cartridge for Information Interchange0.50 in (12.65 mm), Serial Serpentine,208-Track, 85 938 bpi (3383 bpmm)DLT5 FormatSecretariatInformation Technology Industry CouncilApproved March 15, 2000American National Standards Institute, Inc.Copyright American National
4、Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Approval of an American National Standard requires review by ANSI that therequirements for due process, consensus, and other criteria for approval havebeen m
5、et by the standards developer.Consensus is established when, in the judgement of the ANSI Board ofStandards Review, substantial agreement has been reached by directly andmaterially affected interests. Substantial agreement means much more thana simple majority, but not necessarily unanimity. Consens
6、us requires that allviews and objections be considered, and that a concerted effort be madetowards their resolution.The use of American National Standards is completely voluntary; theirexistence does not in any respect preclude anyone, whether he has approvedthe standards or not, from manufacturing,
7、 marketing, purchasing, or usingproducts, processes, or procedures not conforming to the standards.The American National Standards Institute does not develop standards andwill in no circumstances give an interpretation of any American NationalStandard. Moreover, no person shall have the right or aut
8、hority to issue aninterpretation of an American National Standard in the name of the AmericanNational Standards Institute. Requests for interpretations should beaddressed to the secretariat or sponsor whose name appears on the titlepage of this standard.CAUTION NOTICE: This American National Standar
9、d may be revised orwithdrawn at any time. The procedures of the American National StandardsInstitute require that action be taken periodically to reaffirm, revise, orwithdraw this standard. Purchasers of American National Standards mayreceive current information on all standards by calling or writin
10、g the AmericanNational Standards Institute.American National StandardPublished byAmerican National Standards Institute, Inc.11 West 42nd Street, New York, NY 10036Copyright 2000 by Information Technology Industry Council (ITI)All rights reserved.No part of this publication may be reproduced in anyfo
11、rm, 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 AmericaCAUTION: The developers of this standard have requested that holders of patents that may be re-quired for the implementation of
12、 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, ifany, patents may apply to this standard. As of the date of publication of this standard, followingcalls for the identification of pat
13、ents 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 positionis taken with respect to the validity of this claim or of any rights in connection therewith. The knownpatent holder(s) has (have), howeve
14、r, filed a statement of willingness to grant a license underthese 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 resp
15、ect to any standard it processes. No representation ismade or implied that this is the only license that may be required to avoid infringement in the use ofthis standard.Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networkin
16、g permitted without license from IHS-,-,-iContentsPageFOREWORD.vi1 INTRODUCTION 11.1 Scope . 11.2 Purpose 11.3 Conformance 21.4 Dimensions 22 NORMATIVE REFERENCES 23 DEFINITIONS 24 ENVIRONMENT AND SAFETY . 54.1 Cartridge and Tape Testing Environment 54.2 Cartridge Operating Environment 54.3 Cartridg
17、e Storage Environment 64.4 Transportation 64.5 Safety . 64.5.1 Safeness 64.5.2 Flammability . 65 TAPE MECHANICAL, ELECTRICAL AND MAGNETIC REQUIREMENTS 65.1 Material 65.2 Tape length 65.3 Width 65.4 Total thickness . 75.5 Discontinuity. 75.6 Longitudinal Curvature . 75.6.1 Requirement. 75.6.2 Procedu
18、re. 75.7 Out-Of-Plane Distortions 75.8 Cupping 75.8.1 Requirement. 75.8.2 Procedure. 75.9 Coating Surface Roughness 85.9.1 Back Coating Surface Roughness . 85.9.2 Magnetic Coating Surface Roughness. 85.10 Coating Adhesion. 85.10.1 Requirement. 85.10.2 Procedure. 85.11 Layer-to-Layer Adhesion 85.11.1
19、 Requirements. 85.11.2 Procedure. 85.12 Youngs Modulus 95.12.1 Requirement. 95.12.2 Procedure. 95.13 Flexural Rigidity 95.13.1 Requirement. 95.13.2 Procedure. 95.14 Tensile Yield Force 10Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduc
20、tion or networking permitted without license from IHS-,-,-iiPage5.14.1 Requirement. 105.14.2 Procedure. 105.15 Electrical Resistance of the Recording Surface. 105.15.1 Requirement. 105.15.2 Procedure. 105.16 Electrical Resistance of the Back Surface . 105.16.1 Requirement. 105.16.2 Procedure. 105.17
21、 Inhibitor Tape . 115.18 Abrasivity 115.18.1 Requirement. 115.18.2 Procedure. 115.19 Tape and Leader Opacity. 115.19.1 Requirements. 115.19.2 Procedure. 115.20 Friction Coefficient . 125.20.1 Requirement. 125.20.2 Procedure. 125.21 Pre-Record Condition. 126 TAPE MAGNETIC-RECORDING PERFORMANCE 126.1
22、Typical Field. 136.2 Signal Amplitude 136.3 Resolution 136.4 Overwrite 136.4.1 Requirement. 136.4.2 Procedure. 136.5 Peak Shift. 136.5.1 Requirement. 146.5.2 Procedure. 146.6 Self Erasure . 147 TAPE QUALITY . 147.1 Missing pulses 147.1.1 Requirement. 147.2 Missing pulse zone. 147.2.1 Requirement. 14
23、8 MECHANICAL SPECIFICATIONS OF THE TAPE CARTRIDGE 148.1 Cartridge Case Label Areas. 158.2 Cartridge Positioning Planes 158.2.1 Cartridge Positioning Features. 158.2.2 Operating Position 158.2.3 Reel to Drive Hub Interface 158.3 Tape Cartridge Case Material 158.4 File-Protect Mechanism . 158.5 Reel L
24、ock Mechanism 168.6 Tape Winding. 168.7 Winding Tension 168.8 Tape-Reel Diameter. 168.9 Tape-Reel Moment of Inertia . 168.10 Leader Attachment. 16Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without lice
25、nse from IHS-,-,-iiiPage8.11 Cartridge Leader Position. 168.12 Leader Retract Velocity 168.13 Tape Exit Angles 168.14 Tape Access Door 178.15 Tape Position Holes . 179 RECORDING 179.1 Method of Recording 179.2 Code Conversion 179.3 Physical Recording Density 179.4 Bit-Cell Length 179.4.1 Average Bit
26、-Cell Length 179.4.2 Long-Term Average Bit-Cell Length. 179.4.3 Short-Term Average Bit-Cell Length 179.5 Read Signal Amplitude. 179.6 Azimuth. 179.7 Channel Skew 1810 TAPE FORMAT 1810.1 Reference Edge of Tape 1810.2 Direction of recording . 1810.3 Tape layout. 1810.4 Calibration/Directory Area 1810.
27、4.1 Scratch Area. 1810.4.2 Guard Band Areas 1810.4.3 Guard Band Area G1 1810.4.4 Calibration Tracks Area 1810.4.5 Guard band area G2. 1910.4.6 Tape Directory Area . 1910.4.7 Guard band area G3. 2010.5 Data Area . 2010.5.1 Physical Tracks 2010.5.2 Logical Tracks 2010.5.3 References of Track Base 2010
28、.5.4 Width of Tracks. 2010.5.5 Forward Tracks. 2010.5.6 Reverse tracks 2111 FORMAT OF DATA 2111.1 General. 2111.2 Data Bytes 2111.2.1 User Bytes 2111.2.2 Pad Bytes . 2111.2.3 Map Entry Bytes . 2211.3 Blocks: 2211.3.1 Block Types:. 2211.3.2 Data Blocks: . 2211.3.3 Filler Blocks 2211.3.4 End of Track
29、Blocks (EOTR) 2211.3.5 End of Data Blocks (EOD) 2211.3.6 ECC Blocks: . 2311.4 Entity. 23Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ivPage11.5 Envelope 2312 FORMAT AND CONTE
30、NT OF BLOCK STRUCTURES 2312.1 Preamble 2312.2 Sync . 2312.3 Data Field. 2312.3.1 Page Layout. 2412.3.2 Pad Bytes. 2412.3.3 MAP Entries . 2412.3.4 Block Format 2412.4 EDC 2412.5 Control Field 1 2512.5.1 Reserved 2512.5.2 Format 2512.5.3 Tape Mark 2512.5.4 Compression 2512.5.5 Sequential number of the
31、 record blocks. 2512.5.6 Object Number. 2512.5.7 Sequential File Mark Number. 2512.5.8 Sequential File Mark Offset 2612.5.9 Block Type . 2612.5.10 Early Warning. 2612.5.11 Envelope size 2612.5.12 Envelope BackLink. 2612.6 Control Field 2 2612.6.1 Entity Offset 2612.6.2 Envelope first object number 2
32、612.6.3 Block Offset 2612.6.4 Entity Size 2712.6.5 First block of a record 2712.6.6 Entity Number 2712.6.7 Envelope number. 2712.6.8 Random Tag 2712.6.9 K Bit 2712.6.10 Logical Track Number 2712.7 Cyclical Redundancy Check (CRC) . 2712.7.1 Page CRC 2712.7.2 Block CRC 2712.8 Postamble 2813 FORMAT OF
33、ENTITY 2814 FORMAT OF ENVELOPE 2815 ERROR HANDLING. 29Tables1 RLL CODE CONVERSION 302 DIMENSIONS (CUSTOMARY AND SI) FOR FIGURES . 313 NOMINAL LOCATION OF PHYSICAL TRACKS CENTERLINES. 354 BLOCK FORMAT. 36Copyright American National Standards Institute Provided by IHS under license with ANSI Not for R
34、esaleNo reproduction or networking permitted without license from IHS-,-,-vPage5 CONTENTS OF MAP ENTRIES 376 CONTROL FIELD 1 CONFIGURATION. 387 CONTROL FIELD 2 CONFIGURATION. 39Figures1 TAPE RESISTANCE MEASUREMENT ELECTRODES 402 TAPE RESISTANCE MEASUREMENT CIRCUIT 413 WAVEFORM OF PEAKSHIFT . 424 MEA
35、SUREMENT OF ABRASIVITY . 435 DRAWING COORDINATE SYSTEM . 446 TAPE CARTRIDGE 457 CARTRIDGE - BOTTOM VIEW 468 REEL LOCKS AND NOTCHES 479 CARTRIDGE - OPERATING POSITION 4810 CARTRIDGE - SIDE VIEW. 4911 CARTRIDGE - CROSS SECTION . 5012 CARTRIDGE REEL ASSEMBLY 5113 CARTRIDGE LEADER. 5214 POSITION OF CART
36、RIDGE LEADER. 5315 TAPE/LEADER EXIT ANGLES 5416 FORMAT OF CALIBRATION AREA. 5517 CALIBRATION TRACK POSITION 5618 FORMAT OF DATA AREA. 5719 ECC BLOCKS 58AnnexesA PRE-RECORD CONDITION AND MAGNETIC MOMENT MEASUREMENT 60B RECOMMENDATIONS FOR TRANSPORTATION . 61C TAPE CARTRIDGE HANDLING GUIDELINES 63D RE
37、COMMENDATIONS ON TAPE DURABILITY . 64E BIBLIOGRAPHY. 65Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-viForeword (This foreword is not part of American National Standard ANSI N
38、CITS 329-2000.)This standard presents the minimum requirements for the organization and locationof 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 informationreliably. The standard applies to 208-tr
39、ack, 85 938 bpi (3 383 bpmm), serial serpen-tine, 2,7 RLL recording mode tape drives that operate in the streaming mode. Thisformat is called the DLT5.The advantage of using the format described in this standard is that it provides morethan 3.5 times the data capacity when compared to American Natio
40、nal Standard forInformation Technology Magnetic Tape Cartridge for Information Interchange, 0.50in (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
41、 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 tapedrives to provide backup for the increasingly greater capacities of the fixed mediadisk
42、 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 co
43、nsid-eration was given to current practices, existing equipment and supplies, achievingthe broadest possible acceptance, and providing a basis for future improvement inthe 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
44、 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
45、 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 thefollowing members:Ms. Karen Higgenbottom, ChairmanDa
46、ve Michael, Vice ChairmanMs. Monica Vago, NCITS SecretaryOrganization Represented Name of RepresentativeApple Computer Inc David MichaelMr. Jerry Kellenbenz (Alt.) Bull HN Information Systems Inc Randall KilmartinCompaq Computer Corporation . Scott JamesonStephen Heil (Alt.)Hewlett-Packard Company.
47、Karen HigginbottomWendy Fong (Alt.)Hitachi American Ltd. . John NeumannHal Miyamoto (Alt.) IBM Corporation . Ronald F. SillettiMr. Joel Urman (Alt.)Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without li
48、cense from IHS-,-,-viiOrganization Represented Name of RepresentativeLucent Technologies Inc. Herbert BertineMr. Tom Rutt (Alt.)Microsoft Corp.Mark RylandJohn Montgomery (Alt.)Panasonic Technologies Inc. Judson Hofmann Terry J. Nelson (Alt.)Sony Electronics IncMasataka OgawaMichael Deese (Alt.)Sun Microsystems Inc. Carl CargillKen Urquhart (Alt.)Unisys CorporationArnold F. WinklerStephen Oksala A Xerox Corporation.Jean Baroness Kathleen OReilly (Alt.)Aonix .Alexander NawrockiAT relative humidity: 20% to 80%;- maximum wet bulb temperature 80oF (26oC)Tapes containing archival data that will
