DLA A-A-55457 A-1995 DISK FLEXIBLE TWO-SIDED DOUBLE-DENSITY 5 3 TRACKS PER MILLIMETER (TPMM) (135 TRACKS PER INCH (TPI)) 90 MILLIMETERS (MM) (3 5 INCH)《5 3磁道每毫米(TPMM)(135磁道每英寸)90MM.pdf

1、A-A-55457A W 9999974 OLbb7L8 326 AA55457- CINCH-POONDI A-A-55457A SUPERSEDING A-A-55457 April 17, 1995 November 5, 1993 Disk format Minim formatted memory COMMERCIAL ITEM DESCRIPTION DISK, FLEXIBLE, TWO-SIDED, DOUBLE-DENSITY, 5.3 TRACKS PER MILLIMETER (TPMM) (135 TRACKS PER INCH (TPI), 90 MILLIMETER

2、S (M) (3.5 INCH) The General Services Adniinistration has authorized the use of this comnercial item description (CID) for all federal agencies. 1. SCOPE. This CID covers the general requirements for a two-sided, double-density, 5.3 TPMM (135 TPI), 90 mn (3.5 inches) flexible disk. applications. 2.

3、Nuher (PIN) as shown in the following example (see 6.1). Flexible disks covered by this CID are intended for comnercial/industriai CLASSIFICATION. This CID uses a classification system which is included in the Part or Identification 02 CID nunber Dash nunber (see table I) Preformatted for IBM PC/AT,

4、 MS DOS 3.1 and higher. 720 ki lobytes (kb) 3. SALIENT CHARACTERISTICS I I I I - o1 I Unformatteci. I 03 I Preformatted for MAC. I 3.1 Recording surfaces. This flexible disk shall have two recording surfaces. 3.2 Nunber of tracks. interchange on each side of this disk. 3.3 Track density. 3.4 Disk de

5、nsity. unformatted memory. There shall be 80 discrete concentric data tracks in the recording area for data This flexible disk shall have 5.3 TPMM (135 TPI). This flexible disk shall be double density with a minimum of 1.0 megabytes (Mb) of 3.5 Bits per radian (BPR). The BPR for this flexible disk s

6、hall be 7,958 BPR. 3.6 Jacket. inch) x 94.0 mn 10.3 mn (3.70 inches 1.012 inch). The jackets side dimensions shall be 90.0 mn +0.4 mn -0.1 n (3.54 inches +0.016 inch -0.004 Beneficial comnents, recomnendations, additions, deletions, clarifications, etc., and any data which may inprove this docmnt sh

7、ould be sent to: 1507 Wilmington Pike, Dayton, OH 45444-5765, or telephone (513) 296-6189, or facsimile (FAX) Defense Electronics Supply Center, ATTN: DESC-ELDM, AMSC N/A DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. FSC 7045 Provided by IHSNot for ResaleNo reprod

8、uction or networking permitted without license from IHS-,-,-A-A-55457A 9999974 0366737 262 A-A-55457A 3.7 Jacket thickness. The jacket thickness shall be 3.3 mn 10.2 mn (.I3 inch i.008 inch). 3.8 Operating surface temerature. surface in the range from 10C to 60C (50F to 140F) at a relative humidity

9、of 8 percent to 80 percent. 3.9 Design and construction. Flexible disks supplied to this CID shall be as specified herein and shall meet the requirements of ANSI X3.137. 3.10 Used or reconditioned material. reconditioned or is conprised of used or reconditioned material. 4. QUALITY ASSURANCE PROVISI

10、ONS 4.1 product offered meets the salient characteristics of this CID, and that the product conforms to the producers om drawings, specifications, standards, and quality assurance practices, and is the same product offered for sale in the conniercial marketplace. The Govermient reserves the right to

11、 require proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract. 4.2 Certificate of conpliance. submit a DESC certificate of conpliance to DESC-ELDM. product meets all the requirements of ANSI X3.137, and all requirement

12、s of this CID. certificate of conpliance shall accompany all flexible disks supplied to this CID. 4.3 Market acceptability. quality of the product to be provided under this CID: This flexible disk shall withstand an operating temperature at its A manufacturer shall not furnish any flexible disk whic

13、h is used or Contractor certification. The contractor shall certify and maintain substantiating evidence that the Each contractor desiring to be listed as a suggested source of supply shall This certificate shall state that the contractors In addition, a The following market acceptability criteria a

14、re necessary to docunent the a. The company producing the item must have been producing a product meeting the requirements of this CID for at least 2 years. The company nust have sold 1,000 units meeting this CID in the comercial marketplace over the past 2 years. b. 5. PACKAGING 5.1 Preservation. m

15、cking. and marking. Preservation, packing, and marking shall be as specified in the contract or order. 6. NOTES 6.1 PI#. section 2 for PIN format example. 6.2 Source of documents. The PIN should be used for Govermient purposes to buy comercial products to this CID. See Other Publications AMERICAN NA

16、TIONAL STANDARDS INSTITUTE (ANSI) ANSI X3.137 - One and Two-sided, Unformatted, 90-mn (3.5 Inch) , 135-tpi (5.3 TPMM), Flexible Disk Cartridge for 7958 BPR Use- General, Physical, and Magnetic Requirements. (Applications for copies should be addressed to the American National Standards Institute, 11

17、 West 42nd Street, New York, NY 10036-8002). (Industry association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies.) 6.3 Government users. inventory system, contact Defense Electronics Supp

18、ly Center, ATTN: DESC-EOC, 1507 Wilmington Pike, Dayton, OH 45444-5520, or telephone (513) 296-5625. To acquire information on obtaining these flexible disks from the Government 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-55457A m 9999974 0

19、366720 TA4 m o1 02 A-A-55457A CAGE OCEN9 CAGE OEGZ7 CAGE OTUG7 CAGE 04833 CAGE 52327 CAGE 55151 CAGE 74712 15720-09-EWa 54249 C14A211X 725-2995-1 051111-12042 555910 476501 15729-09-EPPP 54038 - - 051111-12882 - 476501 IBM 6.4 Orderinq data. The contract or order should specify the following: a. CID

20、 docunent nunber, revision, and CID PIN. b. Quality assurance provisions. c. d. Packaging requirements. 6.5 Suggested sources of sutwly. added as they become available. I CID dash mniber I Vendor I Vendor I Vendor I Vendor I Vendor I Vendor I Vendor If a bid semple is required. Suggested sources of

21、supply are listed belou. Additional sources will be I comercial comercial I AA55457- I PIN I PIN I PIN I I PIN I PIN conniercial conniercial comercial t I I I I I 476501MAC _ _ IO51111-40758 I _ 03 I 15728-09-EPPP I 54041 I Vendor CAGE nunber OCEN9 OEGZ7 OTUG7 04833 52327 55151 7471 2 Vendor name an

22、d address Syncom Technologies, Incorporated 1000 Syncom Drive Mitchell, SD 57301-4767 (800) 843-9862 BASF Corporation Information Systems Division 35 Crosby Drive Bedford, MA 01730-1471 (703) 256-7112 Uabash Computer Products, Incorporated 12210 E. 52nd Street Tulsa, OK 74146-6204 (918) 254-9704 Nas

23、hua Media, Incorporated DBA Wang Express 57 Daniel Webster Highuay Merrimack, NH 03054-4811 (508) 656-8585 Minnesota Mining and MFG Company Data Storage Products Division 3W Center St. Paul, MN 55144-1000 (800) 854-0033 Maxell Corporation of America 22-08 Route 208 Fair Laun, NJ 07410-2606 (619) 661

24、-6600 Athana, Incorporated 23955 President Avenue Harbor City, CA 90710-1333 (310) 320-4581 6.6 Changes from Drevious issue. to the previous issue due to the extensiveness of the changes. Asterisks are not used in this revision to identify changes with respect 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-55457A CIVIL AGENCY COORDINATING ACTIVITY: GSA - KMR PREPARING ACTIVITY: DLA-ES Project 7045-DOI6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-