1、ANSI INCITS 315-1998 (R2003) (formerly ANSI NCITS 315-1998)for Information Technology Magnetic Tape and Cartridgefor Information Interchange Unrecorded, 128-track, Parallel Serpentine,12.65 mm (1/2 in), 2550 ftpmm (64 770 ftpi)Copyright American National Standards Institute Provided by IHS under lic
2、ense with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSINCITS 315-1998American Nation
3、al Standardfor Information Technology Magnetic Tape and Cartridgefor Information Interchange Unrecorded, 128-track, Parallel Serpentine,12.65 mm (1/2 in), 2550 ftpmm (64 770 ftpi)SecretariatInformation Technology Industry Council (ITI) Approved July 27, 1998American National Standards Institute, Inc
4、.Copyright American National Standards Institute Provided by IHS under license with ANSINot 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 crit
5、eria for approval havebeen met 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 ne
6、cessarily unanimity. Consensus 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
7、 or not, from manufacturing, 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
8、 shall have the right or authority 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: Th
9、is American National Standard 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 st
10、andards by calling or writing the AmericanNational Standards Institute.American National StandardPublished byAmerican National Standards Institute, Inc.11 West 42nd Street, New York, NY 10036Copyright 1998 by Information Technology Industry Council (ITI)All rights reserved.No part of this publicatio
11、n may be reproduced in anyform, 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-quir
12、ed 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, ifany, patents may apply to this standard. As of the date of publication of this standard, followingcalls f
13、or 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 positionis taken with respect to the validity of this claim or of any rights in connection therewith. The knownpatent
14、holder(s) has (have), however, 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 de
15、veloper or publisher in respect 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 ANSINot for ResaleN
16、o reproduction or networking permitted without license from IHS-,-,-iContentsPageForeword v1 Scope, purpose, and application 11.1 Scope . 11.2 Purpose 11.3 Application 11.3.1 Conformance 11.3.2 Dimensions 22 Normative references. 23 Definitions 23.1 anhysteretic erase 23.2 average signal amplitude .
17、 23.3 azimuth. 23.4 back surface. 23.5 bit . 23.6 bit-cell. 23.7 broad-band signal-to-noise ratio 23.8 byte 23.9 cartridge . 33.10 coincident dropouts 33.11 dropout . 33.12 flux-transition position 33.13 flux-transition spacing 33.14 magnetic tape. 33.15 master standard reference tape . 33.16 physic
18、al recording density 33.17 pre-record condition . 33.18 reference field 33.19 resistance per square. 33.20 resolution 33.21 secondary standard reference tape . 33.22 servo bit-cell . 33.23 servo beginning of tape (Servo BOT). 33.24 servo end of tape (Servo EOT) 33.25 servo track 33.26 standard measu
19、rement current (Im). 33.27 standard reference amplitude 33.28 standard reference current (Ir)43.29 track . 43.30 typical field . 43.31 zero crossing 44 Environment and safety . 44.1 Testing environment of tape and cartridge. 44.2 Operating environment of cartridge 44.3 Storage environment of cartrid
20、ge. 44.4 Transportation 54.5 Safety . 54.5.1 Safeness 5Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iiPage4.5.2 Flammability . 55 Mechanical and electrical requirements of tap
21、e. 55.1 Material 55.2 Length of tape 55.3 Width 55.4 Total thickness . 55.5 Base-material thickness . 55.6 Discontinuity. 55.7 Longitudinal curvature 55.7.1 Requirement. 55.7.2 Procedure. 55.8 Out-of-plane distortions 55.9 Cupping 65.9.1 Requirement. 65.9.2 Procedure. 65.10 Frictional drag between t
22、he recording surface and back surface. 65.10.1 Requirement. 65.10.2 Procedure. 65.11 Coating adhesion . 75.11.1 Requirement. 75.11.2 Procedure. 75.12 Electrical resistance of the coated surface. 75.12.1 Requirement. 75.12.2 Procedure. 75.13 Inhibitor tape 75.14 Abrasivity 85.14.1 Requirement. 85.14.
23、2 Procedure. 85.15 Friction characteristics after stress. 85.15.1 Requirement. 85.15.2 Procedure. 85.16 Surface roughness . 95.16.1 Requirement. 95.16.2 Procedure. 96 Tape magnetic requirements . 96.1 Magnetic coercivity. 96.1.1 Requirement. 96.1.2 Procedure. 96.2 Magnetic particle orientation 96.2.
24、1 Requirement. 106.2.2 Procedure. 107 Magnetic recording performance of tape . 107.1 Typical field 107.2 Signal amplitude. 107.3 Resolution 107.4 Broad-band signal-to-noise ratio (BBSNR) 107.4.1 Requirement. 107.4.2 Procedure. 11Copyright American National Standards Institute Provided by IHS under l
25、icense with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iiiPage8 Quality of tape 118.1 Dropout. 118.2 Coincident dropout . 118.3 Dropout density 128.3.1 Requirement. 128.3.2 Procedure. 128.4 Durability of tape. 129 Mechanical specifications of the tape cart
26、ridge 129.1 Label areas of cartridge case . 129.2 Locating areas of cartridge case 139.3 Flexibility of cartridge case . 139.3.1 Requirement. 139.3.2 Procedure. 139.4 File-protect mechanism 139.5 Tape-reel hub . 139.6 Metallic insert 149.7 Brake mechanism. 149.7.1 Brake-button material . 149.7.2 In-
27、hand position 149.7.3 In-machine position 149.8 Winding of tape. 149.9 Winding tension 149.10 Circumference of tape reel . 149.11 Moment of inertia of tape reel. 149.11.1 Requirement. 149.11.2 Procedure. 149.12 Leader block tape attachment 159.13 Leader block pickup position 159.14 Leader block inse
28、rtion force . 159.14.1 Requirement. 159.14.2 Procedure. 159.15 Leader block pull-out force and work 159.15.1 Requirement. 159.15.2 Procedure. 159.16 Cartridge identification notches 169.17 Inhibitor cartridge 1610 Format of tracks 1610.1 Number of tracks 1610.2 Reference edge of tape 1610.3 Position
29、s of tracks 1611 Servo tracks 1611.1 Servo track locations 1611.2 Servo track physical width 1711.3 Servo track format 1711.4 Servo requirements 1711.4.1 Servo amplitude 1711.4.2 Azimuth. 1711.4.3 Tracking error warning 17Copyright American National Standards Institute Provided by IHS under license
30、with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ivPage11.4.4 Tracking rate error 1711.4.5 Fade amplitude limit. 1711.4.6 Multiple-channel servo errors. 1711.4.7 Servo edge spacing . 1811.5 Servo verification process 18Tables1 Key to figures 6 to 15 . 192 A
31、ngle dimensions for figures 6 to 15 223 Data track centerline locations. 23Figures1 Tape resistance measurement electrodes . 242 Tape resistance measurement circuit 243 Ferrite wear bar 254 Wear bar holding fixture. 265 Typical wear bar wear pattern 266 Top and ends of tape cartridge 277 Bottom and
32、side of tape cartridge 288 Description of J character label with bar code . 299 Description of J character label 3010 Bottom side of cartridge showing data cartridge slots 3111 Gear tooth profile . 3212 Hub bottom view 3213 Cross section view of cartridge in hand . 3314 Cross section view of cartrid
33、ge in machine 3315 Leader block seated in cartridge 3416 Leader block tape attachment 3417 Leader block. 3518 Cross section of leader block opening . 3619 Tape cartridge assembly 3720 Usable recording area 3821 Servo track physical layout 3922 Write current profile for outboard servo tracks . 4023 W
34、rite current profile for inboard servo tracks . 40AnnexesA Recommendations for transportation. 41B Tape durability 42C Bibliography . 43Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IH
35、S-,-,-vForeword (This foreword is not part of American National Standard NCITS 315-1998.)This standard presents physical and magnetic requirements for 12.65-mm (0.498-inch), 128-track magnetic tape cartridge to be used for information interchangeamong processing systems, communication systems, and a
36、ssociated equipment.The NCITS B5 Subcommittee on Digital Magnetic Tape, which developed this stan-dard, consists of experienced and qualified specialists on manufacturing magnetictape, and on recording digital information on magnetic tape. This standard supportsthe recording density of 2550 ftpmm (6
37、4 770 ftpi) and complements American Nation-al Standard for Information systems - Magnetic tape and cartridge for information in-terchange - 18-track, parallel, 1/2 inch (12.65 mm), 37 871 cpi (1491 cpmm), Group-coded - Requirements for recording, ANSI X3.180-1990 (R1996), and InternationalStandard
38、for Information processing - Data interchange on 12.7 mm (0.5 in) widemagnetic tape cartridges - 18 tracks, 1491 data bytes per millimetre (37 871 databytes per inch), ISO 9661:1988, and American National Standard for Informationtechnology Magnetic tape and cartridge for information interchange - Un
39、recorded,36-track, parallel, 12.57 mm (0.495 inch), 1944 ftpmm, (49 378 ftpi), Group-coded re-cording, ANSI X3.265-1995. The cartridge, magnetic tape, and recording format rep-resent a significant advancement in reliability and volumetric efficiency for half-inchmagnetic tape. In the development of
40、this standard, careful consideration was givento current practices, existing equipment and supplies, the broadest possible accep-tance, and to providing a basis for future improvements in the use of the cartridgemedium.The standard contains specifications for the physical, magnetic, and performancep
41、roperties of the magnetic media, and the dimensions and characteristics of the car-tridge.This standard includes a number of new criteria that are the result of experiences ob-tained in high-density recording on magnetic tape. As additional experience isgained, improvement in test methods and the ne
42、ed for additional criteria should beexpected. This is particularly relevant in the areas of mechanical interaction betweenthe magnetic tape and the recording head.There are three annexes to this standard. All three are informative and not consid-ered part of this standard.Requests for interpretation
43、, suggestions for improvement or addenda, or defect re-ports are welcome. They should be sent to the NCITS Secretariat, Information Tech-nology Industry Council, 1250 Eye Street, NW, Suite 200, Washington, DC 20005.This standard was processed and approved for submittal to ANSI by AccreditedStandards
44、 Committee on Information Technology, NCITS. Committee approval ofthe standard does not necessarily imply that all members voted for its approval. Atthe time it approved this standard, the NCITS Committee had the following members:Karen Higginbottom, Chair(vacant), Vice-ChairMonica Vago, SecretaryOr
45、ganization Represented Name of RepresentativeAMP, Inc. John HillCharles Brill (Alt.)Apple Computer, Inc. David K. MichaelJerry Kellenbenz (Alt.)AT a magnetic tape of 12.65 mm (0.498 in) width held inside the case on a reel. The tape shall beservo-written and transported on the reel for recording at
46、a physical density of 2550 ftpmm (64 770ftpi). Signal conditioning techniques may result in a higher effective recording density.1.2 PurposeThe purpose of this standard is to define the requirements and supporting test methods necessary to en-sure information interchange at acceptable performance le
47、vels. It is distinct from a specification in that itdelineates a minimum of restrictions consistent with compatibility in interchange transactions.The performance levels contained in this standard represent the minimum acceptable levels of perform-ance for interchange purposes. They, therefore, repr
48、esent the performance levels that the interchangeitems should meet or surpass during their useful life and thus define end-of-life criteria for interchangepurposes. The performance levels in this standard are not intended to be employed as substitutes for pur-chase specifications.Wherever feasible,
49、quantitative performance levels that shall be met or exceeded to comply with this stan-dard are given. In all cases, including those in which quantitative limits for requirements falling within thescope of this standard are not stated but left to agreement between the interchange parties, standard testmethods and measurement procedures shall be used to determine such limits.The interchange parties complying with the a
