ANSI INCITS 265-1995 Information Technology - Magnetic Tape and Cartridge for Information Interchange - Unrecorded 36-Track Parallel 12.57 mm (0.495 in) 1944 ftpmm (49 378 ftpi) Gr.pdf
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1、ANSI INCITS 265-1995 (R2001)(formerly ANSI X3.265-1995 (R2001)for Information Technology Magnetic Tape and Cartridge forInformation Interchange Unrecorded, 36-track, Parallel,12.57 mm (0.495 in),1944 ftpmm (49 378 ftpi)Group-Coded RecordingANSI X3.265-l 995 American National Standard for Information
2、 Technology - Magnetic Tape and Cartridge for Information Interchange - Unrecorded, 36-track, Parallel, 12.57 mm (0.495 in), 1944 ftpmm (49 378 ftpi) Group-Coded Recording Secretariat Information Technology Industry Council Approved June 6, 1995 American National Standards Institute, Inc. American A
3、pproval of an American National Standard requires verification by ANSI that the National Standard requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, s
4、ubstantial 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 toward their resolutio
5、n. 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 Ameri
6、can 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 St
7、andards 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 CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time.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 Institut
8、e 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. CAUTION: The developers of this standard have reques
9、ted that holders of patents that may be required for the implementation of the standard disclose such patents to the publisher. However, neither 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
10、publication of this standard and following calls for the identification of patents that may be required for the implementation of the standard, no such claims have been made. No further patent search IS conducted by the developer or publisher in respect to any standard it processes. No representatio
11、n IS made or implied that licenses are not required to avoid infringement in the use of this standard. Published by American National Standards Institute 11 West 42nd Street, New York, New York 10036 Copyright 01995 by American National Standards Institute All rights reserved. No part of this public
12、ation may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of the publisher. Printed in the United States of America APS2C995145 Contents Page Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv 1 1.1 1.2 1.3 2 3 4 4.1 4.2 4.3 4.4 4.5 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 Scope, purpose, and application .l Scope . 1 Purpose . 1 Application . 1 Normative references. . .2 Definitions 2
14、Environment and safety 4 Testing environment of tape and cartridge . .4 Operating environment of cartridge .4 Storage environment of cartridge . .4 Transportation 4 Safety . .4 Mechanical and electrical requirements of tape .5 Material . .5 Length of tape . .5 Width .5 Total thickness .5 Base-materi
15、al thickness . .5 Discontinuity .5 Longitudinal curvature 5 Out-of-plane distortions . .5 Cupping .5 5.10 Dynamic frictional characteristics . .6 5.1 1 Coating adhesion .7 5.12 Flexural rigidity .7 5.13 Electrical resistance of the coated surface . .8 5.14 Pre-record condition .8 5.15 Inhibitor tape
16、 . .8 5.16 Abrasivity .8 6 6.1 6.2 6.3 6.4 6.5 6.6 7 7.1 7.2 7.3 8 8.1 8.2 Magnetic recording performance of tape .12 Typical field . .12 Signal amplitude .12 Resolution . .12 Overwrite . .12 Narrow-band signal-to-noise ratio (NB SNR) .12 Peak shift . 13 Quality of tape . .13 Dropout . .13 Coinciden
17、t dropout . . 4 Durability of tape . .I4 Mechanical specifications of the tape cartridge . .14 Label areas of cartridge case . .20 Locating areas of cartridge case . 21 i Page 8.3 Flexibility of cartridge case .21 8.4 File-protect mechanism .24 8.5 Tape-reel hub .24 8.6 Metallic insert .24 8.7 Brake
18、 mechanism .25 8.8 Winding of tape . .25 8.9 Winding tension . .26 8.10 Circumference of tape reel . .26 8.1 1 Moment of inertia of tape reel .26 8.12 Leader block tape attachment .26 8.13 Leader block pickup position .26 8.14 Leader block insertion force . .26 8.15 Leader block pull-out force and w
19、ork .27 8.16 Inhibitor cartridge .27 8.17 Cartridge case colors . .27 9 Format of track .27 9.1 Number of tracks . .27 9.2 Reference edge of tape . .27 9.3 Positions of track . .27 9.4 Width of track .28 9.5 Azimuth . .28 10 Data integrity test .28 10.1 Requirement .28 10.2 Procedure .29 Tables 1 Ke
20、y to figures 6 to 15 . .22 2 Angle dimensions for figures 6 to 15 .24 3 Track centerline locations .29 Figures 1 2 3 4 5 6 7 8 9 10 11 12 13 Tape resistance measurement electrodes .9 Tape resistance measurement circuit . .9 Ferrite wear bar . .10 Wear-bar holding fixture . .I1 Typical wear-bar wear
21、pattern .l 1 Top and ends of tape cartridge .15 Bottom and side of tape cartridge . .I6 Gear tooth profile . .17 Hub bottom view .17 Cross-section view of cartridge in hand .18 Cross-section view of cartridge in machine . .18 Leader block seated in cartridge .I9 Leader block tape attachment .19 ii P
22、age 14 Leader block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 15 Cross-section of leader block opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23、. . . . . . . . . . 21 16 Tape cartridge assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 17 Usable recording area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24、. . . . . . . . . . . . . . . . . . . . . . . 28 Annexes A A.1 A.2 B 6.1 B.2 8.3 C c.1 c.2 D D.l D.2 E E.l E.2 F F.l F.2 Pre-record condition .30 Explanation . .30 Procedure .30 Measurement of peak shift . .31 Read equipment .31 Measurement . .31 Data analysis . .31 Recommendations for transportatio
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