ANSI-INCITS-312-1998-R2003.pdf
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1、ANSI INCITS 312-1998 (R2003) (formerly ANSI NCITS 312-1998) for Information Technology Magnetic Tape Cartridge for Information Interchange, 0.50 in (12.65 mm), Serial Serpentine, 128-Track, 81 600 bpi (3212 bpmm) DLT4 Format Copyright American National Standards Institute Provided by IHS under licen
2、se with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 14:08:28 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/111111100
3、1, User=OConnor, Maurice Not for Resale, 04/29/2007 14:08:28 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI NCITS 312-1998 American National Standard for Information Technology Magnetic Tape Cartridge for Information Interchange, 0.50 in (12.65 mm), Serial Serpentine,
4、 128-Track, 81 600 bpi (3212 bpmm) DLT4 Format Secretariat Information Technology Industry Council Approved April 28, 1998 American National Standards Institute, Inc. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConn
5、or, Maurice Not for Resale, 04/29/2007 14:08:28 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
6、 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 tha
7、t 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
8、, 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 interpretation on any American National Standard. Moreover, no person shall have the right or authority to
9、 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 ma
10、y 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 writin
11、g the American National Standards Institute. American National Standard Published by American National Standards Institute, Inc. 11 West 42nd Street, New York, NY 10036 Copyright 1998 by Information Technology Industry Council (ITI) All rights reserved. No part of this publication may be reproduced
12、in any form, in an electronic retrieval system or otherwise, without prior written permission of the publisher. 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 disclo
13、se 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
14、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 sta
15、te- ment of willingness to grant a license under these rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to obtain such a license. Details may be obtained from the publisher. No further patent search is conducted by the developer or publisher in respect to any st
16、andard 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=OConnor, Mau
17、rice Not for Resale, 04/29/2007 14:08:28 MDTNo reproduction or networking permitted without license from IHS -,-,- i Contents Page Foreword.iv 1 Introduction. 1 1.1Scope . 1 1.2Purpose 1 1.3Conformance 2 1.4Dimensions. 2 2 Normative references. 2 3 Definitions. 3 4 Environment and safety 5 4.1Cartri
18、dge and tape testing environment . 5 4.2Cartridge operating environment 6 4.3Cartridge storage environment. 6 4.4Transportation 6 4.5Safety . 6 5 Tape mechanical, electrical, and magnetic requirements 7 5.1Material. 7 5.2Tape Length . 7 5.3Total thickness 7 5.4Width 7 5.5Discontinuity. 7 5.6Longitud
19、inal curvature 7 5.7Out-of-plane distortions 7 5.8Cupping 8 5.9Coating surface roughness. 8 5.10 Coating adhesion 8 5.11 Layer-to-layer adhesion 9 5.12 Youngs modulus 10 5.13 Flexural rigidity . 10 5.14 Tensile yield force. 10 5.15 Electrical resistance of the recording surface. 11 5.16 Electrical r
20、esistance of the back surface 11 5.17 Inhibitor tape. 12 5.18 Abrasivity 12 5.19 Tape and leader opacity. 13 5.20 Friction coefficient. 13 5.21 Pre-record condition. 13 6 Tape magnetic recording performance. 14 6.1Typical field. 14 6.2Signal amplitude. 14 6.3Resolution. 14 6.4Overwrite 14 6.5Peak sh
21、ift 15 6.6Self-erasure 15 7 Tape quality 16 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 14:08:28 MDTNo reproduction or networking permitted without license from IHS -,-,- i
22、i Page 7.1Dropouts. 16 7.2Excessive duration error. 16 7.3Tape edge quality. 16 8 Mechanical specifications of the tape cartridge 16 8.1Cartridge case label areas . 17 8.2Cartridge positioning planes. 17 8.3Tape cartridge case material 17 8.4File-protect mechanism 17 8.5Reel lock mechanism . 18 8.6T
23、ape winding 18 8.7Winding tension 18 8.8Tape-reel diameter. 18 8.9Tape-reel moment of inertia . 18 8.10 Leader attachment . 18 8.11 Cartridge leader position 18 8.12 Leader retract velocity 18 8.13 Tape exit angles. 19 8.14 Tape access door. 19 8.15 Tape position holes 19 9 Recording. 19 9.1Method o
24、f recording . 19 9.2Code conversion 19 9.3Physical recording density 19 9.4Bit-cell length 19 9.5Read signal amplitude 20 9.6Azimuth 20 9.7Channel skew. 20 10 Tape format 20 10.1 Reference edge of tape 20 10.2 Direction of recording . 20 10.3 Tape layout. 20 10.4 Calibration/directory area . 21 10.5
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