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1、BRITISH STANDARD BS 4783-7: 1993 Storage, transportation and maintenance of media for use in data processing and information storage Part 7: Recommendations for optical data disks (CD-ROM) UDC 681.327.68:651.54 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 02:01:31 GMT+00:00 2006, Uncontrol
2、led Copy, (c) BSI BS 4783-7:1993 This British Standard, having been prepared under the direction of the Information Systems Technology Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 January 1993 BSI 07-1999 The following BSI reference
3、s relate to the work on this standard: Committee reference IST/4 Draft for comment 91/66476 DC ISBN 0 580 21363 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Information Systems Technology Standards Policy Committee (IST/-) to Techni
4、cal Committee IST/4, upon which the following bodies were represented: British Computer Society Her Majestys Stationery Office ICI Imagedata Institution of Electrical Engineers International Computers Limited Kodak Limited Amendments issued since publication Amd. No.DateComments Licensed Copy: sheff
5、ieldun sheffieldun, na, Fri Dec 01 02:01:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4783-7:1993 BSI 07-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Informative references1 3Definitions1 4CD-ROM storage area1 5Control procedures for incoming CD-ROMs1 6Environ
6、ment and storage2 7Handling3 8Cleaning and maintenance3 9General maintenance3 10Transportation3 Appendix A (informative) Recommended goods inwards and inspection procedures4 Table 1 Environmental conditions2 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 0
7、2:01:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4783-7:1993 ii BSI 07-1999 Foreword This Part of BS 4783 has been prepared under the direction of the Information Systems Technology Standards Policy Committee. It has been developed from advice and information provided by government computing de
8、partments, optical media suppliers and manufacturers, users and specialist media maintenance organizations. It is written as a guide to users for the purpose of managing their computer media. The use of high-grade materials and modern production techniques, that include rigorous testing and inspecti
9、on, ensures that CD-ROM disks are manufactured to exacting standards. To continue to benefit from the care taken during manufacture, and to ensure optimum performance from a product during its life, the user should exercise care, and this British Standard gives appropriate advice. Manufacturers publ
10、ications often cover some of the advice given herein and, where available, should be read in conjunction with this standard. The following Parts of BS 4783 have already been published: Part 1: Recommendations for disk packs, storage modules and disk cartridges; Part 2: Recommendations for magnetic t
11、ape on open spools; Part 3: Recommendations for flexible disk cartridges; Part 4: Recommendations for magnetic tape cartridges and cassettes; Part 5: Recommendations for 12.7 mm magnetic tape cartridges for data interchange recording at 1491 data bytes per millimetre on 18 tracks; Part 6: Recommenda
12、tions for optical disk cartridges. The following British Standards and international standards are relevant to optical data disks BS 6266, Code of practice for fire protection for electronic data processing installations. BS 7083, Recommendations for the accommodation and operating environment of co
13、mputer equipment. BS ISO/IEC 10149, Information technology Data interchange on read-only 120 mm optical data disks (CD-ROM). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance
14、 with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had
15、 amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 02:01:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4783-7:1993 BSI 07-19991 1 Scope This Part of BS 4783 provides recommendations on the care
16、and maintenance of CD-ROMs. It includes recommendations for storage, handling, transportation, inspection, cleaning, maintenance and fault identification. NOTEA CD-ROM is usually supplied in a removable case, caddy, or other form of packaging. 2 Informative references This Part of BS 4783 refers to
17、other publications that provide information or guidance. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made to the latest editions. 3 Definitions For the purposes of this Part of BS 4783 the following definit
18、ions apply. 3.1 caddy an easily opened cartridge which provides storage and protection for a CD-ROM and which facilitates insertion into the drive 3.2 contamination deposits that could lead to degradation of performance 3.3 extreme environment environmental conditions outside the limits recommended
19、in this Part of BS 4783 3.4 long term storage any storage period greater than 6 months 3.5 Compact Disc Read Only Memory (CD-ROM) an optical disk in which the data is recorded as part of the manufacturing process. Data can only be read from the disk, it cannot be changed by the user 3.6 CD-ROM disk
20、drive a mechanism that rotates a CD-ROM for the purpose of reading data 4 CD-ROM storage area 4.1 General CD-ROMs should be suitably stored in specially designed racks or storage boxes and their use should be monitored by means of a central facility. The CD-ROM storage area should be dedicated to th
21、e storage of CD-ROMs. If this is not possible, consideration should be given to the effects of other media, equipment and materials on the CD-ROMs. NOTEAlso see the recommendations for environment and storage in 6. 4.2 Personnel Personnel should be trained in their responsibility for the condition,
22、care and handling of CD-ROMs. Ideally, an individual should be designated as a Librarian with overall responsibility for day-to-day maintenance and control. 4.3 Security, safety and cleaning Access to the storage and operational areas should be controlled and restricted to essential personnel, both
23、to keep down the amount of dust and dirt and to maintain security. Potentially hazardous items (e.g. cleaning fluids) should be identified with a suitable warning label and should be kept in a locked cabinet when not in use. Storage and operational areas should not be allowed to become contaminated
24、and preventative cleaning, using a disciplined schedule, should be implemented. A smart, clean working environment is often an outward sign of an effective unit and may positively assist employee morale. There should be no eating, drinking or smoking in this area because of the risk of contamination
25、. The materials, equipment and methods used to clean the storage and operational areas should be approved by the equipment suppliers or media manufacturers. Precautions should be taken to eliminate electrostatic effects. All personnel should wear clothing that is anti-static and does not shed fibres
26、. Some personal cosmetics including hand creams, nail varnish and face powders may lead to contamination and their use should be avoided. 5 Control procedures for incoming CD-ROMs 5.1 Incoming inspection On receipt of new or interchanged CD-ROMs, the recommended inspection procedures described in Ap
27、pendix A should be followed. Any CD-ROM delivered in a damaged carton should be set aside for immediate reference to the consignor in case the consignor needs to make a claim against the carrier. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 02:01:31 GMT+00:00 2006, Uncontrolled Copy, (c) B
28、SI BS 4783-7:1993 2 BSI 07-1999 The high standards of dust filtration and cleanliness used during manufacture normally ensure that newly delivered CD-ROMs do not require cleaning prior to use. However, a preliminary inspection by the user is essential and, if contamination is suspected, a site engin
29、eer or media supplier, or both, should be asked for advice. NOTEAlso see the recommendations for identification and correction of faults in 9.1. 5.2 Records When any CD-ROM is brought into the storage area, a record should be created or updated relating to its usage, cleaning and inspection. 5.3 Acc
30、limatization Acclimatization is needed to allow the effects of temperature and relative humidity to stabilize. The period required for acclimatization depends on the following: a) the time that the CD-ROM has been outside the limits of environmental conditions for the operational area (see Table 1);
31、 b) the extremes of temperature and humidity to which the CD-ROM has been subjected during shipment, albeit in its transit carton. CD-ROMs should be acclimatized for at least 24 h in the transit carton before unpacking. NOTENo condensation should be allowed to occur on or in the ODC. 5.4 Labelling L
32、abels and marking systems should be those recommended by the CD-ROM supplier. Labels should not be affixed to the disk surfaces but may be affixed to the caddy, if one is used. Information should not be erased from labels. If information is to be changed, old labels should be removed before applying
33、 new labels. 6 Environment and storage 6.1 Environment Monitoring devices for temperature and humidity should be installed and should be independent of mains power supply. CD-ROMs should not be kept in an environment where rapid changes of temperature and/or humidity may occur, e.g. near humidifier/
34、dehumidifier units. Exposure to direct sunlight may cause permanent damage to CD-ROMs or recorded data or both and should be avoided. The storage area should have environmental conditions the same as, or very similar to, those of the operational area. The environmental conditions should be either th
35、ose recommended by the CD-ROM manufacturers or as given in Table 1. If the conditions are different from those set out in Table 1, CD-ROMs should be acclimatized for a minimum of 6 h in the same environment as that in which the CD-ROM disk drive is operating. 6.2 Protection When not in use, CD-ROMs
36、should be suitably stored in specially designed racks or in storage boxes. For extra security, CD-ROMs should be stored within metal, fire-resistant cabinets with lockable doors. 6.3 Long term storage If long term storage of data is required it is advisable that the CD-ROM used is of good quality, a
37、ppropriately labelled and is adequately protected during the period of storage. CD-ROMs selected for this purpose should be free from the physical defects listed in A.3.1. Table 1 Environmental conditions TemperatureMaximum temperature gradient Relative humidity Maximum wet bulb Maximum relative hum
38、idity gradient Atmospheric pressure CK/h% r.h.C% r.h./hkPa Operational areaa Non-operational areaa Long term storage (also see 6.3)b 10 to 50 10 to 50 18 to 22 10 15 5 10 to 80 5 to 90 35 to 45 29 29 29 10 10 10 75 to 105 75 to 105 75 to 105 NOTEFor details of acclimatization see 5.3. a These are re
39、commended conditions. b These are optimum conditions. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 02:01:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4783-7:1993 BSI 07-19993 7 Handling CD-ROMs should be handled as follows. a) Care should be taken with the CD-ROM when loading it into o
40、r extracting it from, the drive, using a caddy if required. b) When handling a CD-ROM, only the extreme edges and the centre hole should be held. c) The recorded surface of a CD-ROM should not be touched. d) If caddies are used, repeated loading and extraction of disks should be avoided to minimize
41、disk damage. e) CD-ROMs should not come into contact with liquids, dust or smoke. f) CD-ROMs should be removed from drives that have been switched off and should be removed from drives that are inactive for long periods. g) CD-ROMs should not be exposed to extreme heat or direct sunlight. h) Informa
42、tion should be written on labels before their application to caddies or containers. i) Where label details have to be amended, the existing label should be removed and discarded. A new correctly identified label should then be fitted. 8 Cleaning and maintenance If the recorded surface of a CD-ROM be
43、comes contaminated, e.g. by fingerprints, the disk surface should be cleaned by gently wiping from the centre of the disk to the edge using a clean, lint-free cloth moistened with a cleaning fluid approved by the original supplier. 9 General maintenance 9.1 Identification and correction of faults In
44、 the event of performance problems where media malfunction is suspected, the following procedures should be followed. a) Inspect CD-ROM surfaces for damage, e.g. scratches, contamination, or fingerprints. b) If the operator has any doubt about his ability to inspect a CD-ROM, or about his interpreta
45、tion of what he sees, seek experienced assistance. c) If repetitive CD-ROM failures occur, investigate the condition of both the media and the drive. d) If a CD-ROM remains questionable after procedures a) to c), withdraw it from service. e) Obtain a replacement CD-ROM. 9.2 Disaster precautions It i
46、s recommended that a disaster recovery plan should be in operation in case of fire, flood, exposure to fire extinguishing agents, etc. This plan should encompass the following points: a) back-up facilities offsite; b) CD-ROM cleaning; c) acclimatization period; d) replacement CD-ROMs; e) consultatio
47、n with CD-ROM experts, e.g. manufacturers. 10 Transportation CD-ROMs should be adequately supported to prevent their movement during transportation and the use of original type packaging is recommended. The packaging should have a clean interior and a construction that provides sealing to prevent th
48、e ingress of dirt and moisture. During transportation, extreme changes in temperature and humidity should be avoided. The CD-ROM should be maintained in cool, dry conditions. The following environmental limits should not be exceeded. No condensation on the CD-ROM should be allowed to occur. After tr
49、ansportation, and before use, the recommendations for acclimatization in 5.3 should be adopted. Temperature 20 C to 55 C Relative humidity5 % r.h. to 90 % r.h. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 02:01:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4783-7:1993 4 BSI 07-1999 Appendix A (informative) Recommended goods inwards and inspection procedures A.1 General The procedures in A.2 to A.4 are recommended on receipt of all CD-ROMs, including any transported between sites for the purposes of data interchange or offsite storage. A.2
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