1、ANSI INCITS 341-2000 (R2005)(formerly ANSI NCITS 341-2000)for Information Technology 25.4 mm (1 in) Type DCRsiRecorded Instrumentation Digital Cartridge Tape FormatStabilized as INCITS 341:2000 S2015ANSINCITS 341-2000American National Standardfor Information Technology 25.4 mm (1 in) Type DCRsiRecor
2、ded Instrumentation Digital Cartridge Tape FormatSecretariatInformation Technology Industry Council (ITI)Approved December 13, 2000 American National Standards Institute, Inc.Approval of an American National Standard requires review by ANSI that therequirements for due process, consensus, and other
3、criteria 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 no
4、t necessarily 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 stand
5、ards 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 pe
6、rson 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
7、: This 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 al
8、l standards by calling or writing 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 public
9、ation 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-
10、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, ifany, patents may apply to this standard. As of the date of publication of this standard, followingcal
11、ls 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 positionis taken with respect to the validity of this claim or of any rights in connection therewith. The knownpat
12、ent 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 th
13、e developer 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.iContentsPageForeword vii1 Scope, purpose and application. 11.1 Scope. 11.2 Purpose 11.3 Applicati
14、on . 21.3.1 Conformance . 21.3.2 Dimensions 22 References. 22.1 American National Standards 22.2 Other standards . 22.3 Related publications. 33 Definitions 34 Environment and safety . 64.1 Test environment . 64.2 Tape conditioning prior to testing. 64.3 Operating environment 64.4 Cartridge conditio
15、ning prior to operational use 64.5 Storage environment 74.6 Safety. 74.6.1 Safeness 74.6.2 Flammability. 74.6.3 Toxicity. 74.7 Test methods . 75 Tape characteristics. 85.1 Materials 85.2 Tape width and tolerance. 85.2.1 Requirement 85.2.2 Procedure 85.3 Delta width . 85.3.1 Requirement 85.3.2 Proced
16、ure 85.4 Tape thickness. 85.4.1 Base film thickness 85.4.2 Oxide coating thickness. 85.4.3 Back coating thickness 85.5 Longitudinal curvature 95.5.1 Requirement 95.5.2 Procedure 95.6 Discontinuity. 95.7 Leaders and trailers . 95.8 Coating adhesion. 95.8.1 Requirement 95.8.2 Procedure 95.9 Tape cuppi
17、ng . 95.9.1 Requirement 95.9.2 Procedure 9iiPage5.10 Out-of-plane distortions . 95.11 Elongation yield strength . 105.11.1 Requirement 105.11.2 Procedure 106 Magnetic and electrical properties . 116.1 Magnetic coating 116.2 Coercivity . 116.3 Retentivity 116.4 Particle orientation . 116.5 Backcoat 1
18、16.6 Surface resistivity of the magnetic and back coatings . 116.6.1 Requirement 116.6.2 Procedure 116.7 Ease of erasure . 116.8 Average signal amplitude uniformity 127 Cartridge characteristics 137.1 General description 137.1.1 Cartidge dimensions 137.1.2 Tolerances . 137.2 General specifications .
19、 137.2.1 Identification. 137.2.2 Material 137.2.3 Corrosion resistance 137.2.4 Window 137.2.5 Minimum tape length . 147.2.6 Minimum tape wrap on reels 147.2.7 Magnetic coating surface. 147.3 Datum planes. 157.3.1 Datum plane Z . 157.3.2 Datum plane X . 157.3.3 Datum plane Y . 157.4 Windows and label
20、s. 197.4.1 Window and label areas 197.4.2 Label attachment area . 197.4.3 Label clearances 197.5 Record lockout plug . 217.5.1 Dimension and location . 217.5.2 Detent 217.5.3 Setting identification. 217.5.4 Settings 217.5.5 Retention . 217.5.6 Maximum axial force 217.5.7 Color 217.6 Reels 237.6.1 Re
21、el dimensions and reel to reel table relationships . 237.6.2 Reel locking . 237.6.3 Reel unlocking . 237.6.4 Reel lock mechanism spring 237.7 Lid 277.7.1 Lid unlocking 27iiiPage7.7.2 Lid unlocking force . 277.7.3 Lid opening. 277.7.4 Lid locking 277.7.5 Maximum force to open lid. 277.7.6 Direction o
22、f force to open lid 278 Tape recorded format. 318.1 Overview 318.2 General specifications 318.2.1 Dimensions 318.2.2 Tape reference edge 318.2.3 Equivalent reference edge . 318.3 Track locations and dimensions. 318.4 Relative positions of recorded signals 318.5 Gap azimuth. 318.5.1 Transverse scan t
23、racks 318.5.2 Control track and longitudinal data track 329 Usable tape length, record zones and inter-record zone . 359.1 Overview 359.2 Usable tape length . 359.2.1 Beginning-of-Tape (BOT). 359.2.2 Virtual BOT. 359.2.3 Near EOT. 359.2.4 Record EOT . 359.2.5 End-of-Tape (EOT) 359.3 Record zones and
24、 inter-record zone 369.3.1 Pre-record zone . 379.3.2 User record zone 379.3.3 Post record zone 379.3.4 User record spacing . 379.3.5 Insert and crash recording . 3710 Transverse scan data, pilot tone, and control track . 3810.1 Overview 3810.2 Transverse scan track data format, synchronization, and
25、recording requirements 3910.2.1 Labeling conventions . 3810.2.2 Introduction 3910.2.3 Transverse scan track details 4110.3 ECC encoding 4510.4 Record data randomization 4510.5 Transverse scan track pre-record zone . 4910.5.1 Codeword 1 SAT byte 5010.5.2 Codeword 3 SAT byte 5010.5.3 Codeword 5 SAT by
26、te 5010.5.4 Codeword 7 SAT byte 5010.5.5 Codeword 9 SAT byte 5010.5.6 Codeword 11 SAT byte 5010.5.7 Codeword 13 SAT byte 5010.5.8 Codeword 15 SAT byte 5010.5.9 Codeword 17 SAT byte 50ivPage10.5.10 Codewords 2, 4, 6, 8,10, 12, 14, 16, and 18 SAT bytes 5110.6 Transverse scan track post-record zone . 5
27、110.6.1 Codeword 1 SAT byte 5210.6.2 Codeword 3 SAT byte 5210.6.3 Codeword 5 SAT byte 5210.6.4 Codeword 7 SAT byte 5210.6.5 Codeword 9 SAT byte 5210.6.6 Codeword 11 SAT byte 5210.6.7 Codeword 13 SAT byte 5210.6.8 Codeword 15 SAT byte 5210.6.9 Codeword 17 SAT byte 5210.6.10 Codewords 2, 4, 6, 8,10, 1
28、2, 14, 16, and 18 SAT bytes 5210.7 Record data precoding 5310.8 Pilot 5310.8.1 Pilot frequency . 5310.8.2 Pilot amplitude . 5310.8.3 Pilot phase . 5310.9 Magnetization 5410.9.1 Polarity. 5410.9.2 Record equalization . 5410.9.3 Record current level. 5410.10 Control track 5510.10.1 Record method 5510.
29、10.2 Signal. 5510.10.3 Flux polarity . 5510.10.4 Flux level 5510.10.5 Position 5511 Longitudinal data track. 5611.1 Synchronization . 5811.2 Motion sequence number 5811.3 Search block identification number 5911.4 Sub-block odd/even (SBOE) 5911.5 User log/system data (ULSD) 5911.5.1 User log data . 6
30、011.5.2 System data. 6111.6 Coarse scan address. 6211.7 Fine scan address . 6211.8 Coarse time code (CTC) 6311.9 Fine time code (FTC). 6311.10 Write format . 6311.11 Check sum (CS) 6411.12 Reserved bits (RSVD) . 6511.13 Longitudinal data track - pre-record zone 6511.14 Longitudinal data track - post
31、-record zone 6511.15 Record data sequence. 6611.16 Method of encoding . 6611.17 Method of recording. 6611.18 Flux level 6611.19 Relative position 66vPageTables1 Mechanical tolerances 132 Recorded track location and dimensions 343 Record zone spacing 364 Formatting of ECC codewords (blocks) 435 Locat
32、ion of SAT data within each transverse scan track 446 Pseudorandom sequence generator (51 bytes) . 487 SAT data for pre-record zone 498 SAT of codewords 1, 3, and 5 for pre-record zone. 499 SAT data for post-record zone. 5110 SAT of codewords 1, 3, and 5 for post-record zone . 5111 Search block sync
33、hronization and messages. 5812 Synchronization 5813 Motion sequence number . 5914 Search block identification number. 5915 Sub-block number. 5916 Distribution of user log data in longitudinal data block 6017 User log data in search blocks 3 - 22 . 6018 Distribution of system data in longitudinal dat
34、a block . 6119 System data in search blocks 1, 2, 23, Relative humidity: 50% 2%;Barometric pressure: 96 kPa 10 kPa (13.93 1.45 psi);Tape tension: 1.65 N 0.25 N (5.9 0.9 ozf);4.2 Tape conditioning prior to testingConditioning of the tape stock before recording and testing shall be as follows:Storage
35、conditioning: Not less than 24 hours;Environmental Stabilized to the conditions specified in 4.1 above;Tape tension: Wound on a reel at a tension of 1.10 Nto 1.90 N (4 ozf to 6.9 ozf).4.3 Operating environmentCartridges used for data interchange shall operate under the following conditions:Temperatu
36、re: 4C to 50C (39F to 122F);Relative humidity: 20% to 80%, non-condensing;Maximum wet bulb temperature: 26C (79F).4.4 Cartridge conditioning prior to operational useFor interchange, the cartridge shall be conditioned by exposure to the operating environment for atime equal to or greater than the tim
37、e away from the operating environment (up to a maximum of24 hours).Conditioning of the tape stock prior to operational use shall be as follows:Storage conditioning: Not less than 24 hours;Environmental: Stabilized to within 5C (9F) of theoperational environment as specified in4.3 above but not to ex
38、ceed thespecifications therein;Tape tension: Wound on a reel at a tension of 1.10 Nto 1.90 N (4 ozf to 6.9 ozf).ANSI NCITS 341-200074.5 Storage environmentCartridges shall be stored under the following conditions:Temperature: 4C to 32C (39F to 90F);Relative humidity: 40% to 60%.For the environment f
39、or transportation refer to Annex A4.6 Safety4.6.1 SafenessThe components of the tape and cartridge assembly shall not constitute any safety or health haz-ard when used in the intended manner, or through any foreseeable misuse in an information pro-cessing system.4.6.2 FlammabilityTape or cartridge c
40、omponents that will ignite from a match flame, and when so ignited will con-tinue to burn in a still carbon dioxide atmosphere, shall not be used.4.6.3 ToxicityTape or cartridge components that may cause bodily harm by contact, inhalation, or ingestion dur-ing normal use of the cartridge shall not b
41、e used4.7 Test methodsUnless otherwise specified, all tests shall be performed in accordance with IEC publication 735,Measuring methods for video tape properties.ANSI NCITS 341-200085 Tape characteristics5.1 MaterialsThe tape shall consist of a base film of precision smooth polyester coated on the f
42、ront side with aflexible layer of cobalt doped gamma-ferric oxide magnetic particles, or equivalent, in a suitablebinder. A backcoating may be applied to the back surface.5.2 Tape width and tolerance5.2.1 RequirementThe tape width shall be 25.349 mm 0.050 mm (0.998 in 0.002 in).5.2.2 ProcedureThe ta
43、pe, covered with a glass plate, shall be measured without tension at a minimum of five (5)equally spaced positions over any random 30 cm (11.8 in) length of the tape using a calibratedmicroscope or profile projector having an accuracy of at least 2.5 m (98.4 in). Tape width isdefined as the average
44、of the five (5) readings.5.3 Delta width5.3.1 RequirementDelta width (width fluctuation) shall be less than 0.100 mm (0.0039 in).5.3.2 ProcedureMeasurement of delta width (width fluctuation) shall be measured over 30 cm (11.8 in) and willbe determined by the difference in the maximum width found min
45、us the minimum width found.5.4 Tape thicknessThe tape thickness shall be between 18.5 m (0.728 x 10-3in) and 22.5 m (0.886 x 10-3in).5.4.1 Base film thicknessThe polyester base film thickness shall be between 13.75 m (0.541 x 10-3in) and 16.75 m(0.659 x 10-3in).5.4.2 Oxide coating thicknessThe oxide
46、 coating thickness shall be between 4.25 m (0.167 x 10-3in) and 5.5 m (0.216 x 10-3in).5.4.3 Back coating thicknessThe back coating thickness shall be between 0.5 m (0.019 x 10-3in) and 1.1 m (0.043 x 10-3in).ANSI NCITS 341-200095.5 Longitudinal curvature.5.5.1 RequirementThe tape longitudinal curva
47、ture shall not exceed 100 m (0.0039 in) peak-to-valley.5.5.2 ProcedureThe tape shall be measured with a uniform tensile force of 2.1 N (7.5 ozf) over a length of 30 cm(11.8 in) using a calibrated microscope or profile projector having an accuracy of at least 2.5 m(98.4 in).5.6 DiscontinuityThere sha
48、ll be no discontinuities in the magnetic tape such as those produced by tape splicing orperforation.5.7 Leaders and trailersThe cartridge shall not include leader and trailer tape.5.8 Coating adhesionCoating adhesion is the force required to separate any part of the coating from the tape base filmma
49、terial.5.8.1 Requirement(a) The force required to separate any part of the magnetic coating from the tape base filmmaterial shall not be less than 1.0 N (3.5 ozf).(b) The force required to separate any part of the back coating from the tape base film materialshall not be less than 1.0 N (3.5 ozf).5.8.2 ProcedureThe coating adhesion of the magnetic coating and back coating surfaces shall be measured as fol-lows.(a) Take a sample of the tape approximately 381 mm (15 in) long and scribe a line through thecoating across the width of the tape, 127 mm
