IEC 62702-1-2:2017

IEC 62702-1-2 ®
Edition 1.0 2017-11
INTERNATIONAL
STANDARD
colour
inside
Audio archive system –
Part 1-2: BD disk and data migration for long-term audio data storage
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IEC 62702-1-2 ®
Edition 1.0 2017-11
INTERNATIONAL
STANDARD
colour
inside
Audio archive system –
Part 1-2: BD disk and data migration for long-term audio data storage

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160.30; 35.220.30 ISBN 978-2-8322-4919-2

– 2 – IEC 62702-1-2:2017 © IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 9
4 Disk and lifetime for long term audio data storage . 9
4.1 Disk for long term audio data storage . 9
4.2 Lifetime estimation . 9
4.3 B Life for long-term audio data storage . 10

mig
4.4 Estimated lifetime rank and display colour . 11
4.4.1 Estimated lifetime rank and display colour identification . 11
4.4.2 B Life and display colour indication on disks and packages . 11
mig
5 Test condition, test methods and disks for audio data migration . 11
5.1 Ambient conditions for testing . 11
5.2 Test methods . 11
5.2.1 General . 11
5.2.2 Max RSER . 11
5.2.3 Test area of recorded disk . 11
5.3 Test drive calibration. 11
6 Test result evaluation . 12
6.1 Initial performance test result evaluation . 12
6.2 Periodic performance test evaluation . 12
6.3 Reporting items. 13
6.3.1 Initial performance test result . 13
6.3.2 Periodic performance test result . 13
6.4 Management of reporting items . 13
6.5 Test and migration intervals . 13
7 Prevention of deterioration . 14
Annex A (informative) Guideline of usage and indication . 15
A.1 Usage of lifetime rank . 15
A.2 Lifetime rank indication and place . 15
A.2.1 Lifetime rank indication . 15
A.2.2 Indication example . 15
Annex B (informative) Recommendations on handling, storage and cleaning conditions
for BD writable disks . 16
B.1 Handling . 16
B.2 Storage . 16
B.3 Cleaning . 17
Annex C (informative) Causes of deterioration for BD disks for long-term data storage . 18
C.1 Deterioration . 18
C.2 Disk structure. 18
C.3 Causes of deterioration . 18
C.4 Nature of deterioration . 19
C.5 Effects of deterioration . 19

C.6 Unexpected deterioration . 19
Bibliography . 20

Figure 1 – Data migration flow for the initial and the periodic performance tests . 13
Figure A.1 – Lifetime rank indication example . 15

Table 1 – Category of initial recording performance . 12
Table 2 – Category of recording performance at periodic performance . 12
Table B.1 – Recommended conditions for general storage . 16
Table B.2 – Recommended conditions for controlled storage . 16

– 4 – IEC 62702-1-2:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUDIO ARCHIVE SYSTEM –
Part 1-2: BD disk and data migration for long-term audio data storage

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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International Standard IEC 62702-1-2 has been prepared by technical area 6: Storage media,
storage data structures, storage systems and equipment, of IEC technical committee 100:
Audio, video and multimedia systems and equipment.
The text of this International Standard is based on the following documents:
CDV Report on voting
100/2894/CDV 100/2970/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 6 – IEC 62702-1-2:2017 © IEC 2017
INTRODUCTION
Sound recordings such as music, speech, and storytelling are an important human heritage
and should be preserved for a long term as much as possible. However, we were not able to
record sounds in order to preserve them in the past. The first recoding was achieved by
Edison in 1877.
Although various technologies were invented later, most of them have limitations for audio
archives because storage lifetime is limited and the sound quality deteriorates when it is
transferred to the next generation storage device.
The progress of LSI (Large-Scale Integrated Circuit) technology made digital recording of
recorded sound possible. The digital recording is very suitable for audio archiving because
the migration is performed by copying digital data.
For this purpose various recording materials exist, such as optical disks, magnetic disks,
magnetic tape and nonvolatile memory such as a phase-change memory.
This document specifies physical and logical aspects for a standard of audio archives of
various storage types which are typically used for audio archives in markets.
The IEC 62702 series currently consists of:
– IEC 62702-1, which specifies the minimum requirements on physical aspects of optical
disks for digital sound recordings; IEC 62702-1-1 specifies requirements for DVD optical
disks, IEC 62702-1-2 specifies requirements for BD optical disks.
– IEC 62702-2, which specifies the minimum requirements for digitization of content, format
of digitized content, content information and media inspection.

AUDIO ARCHIVE SYSTEM –
Part 1-2: BD disk and data migration for long-term audio data storage

1 Scope
This part of IEC 62702-1 specifies a method of data-quality assurance for writable disks
(hereinafter "disks") which are specified for long-term data storage, and a data migration
method, which can sustain the recorded data on disks for long-term audio data preservation.
The writable disks include BD Recordable disk and BD Rewritable disk.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
ISO/IEC 16963:2017, Information technology – Digitally recorded media for information
interchange and storage – Test method for the estimation of lifetime of optical disks for long-
term data storage
ISO/IEC 29121:2017, Information technology – Digitally recorded media for information
interchange and storage – Data migration method for optical disks for long-term data storage
ISO/IEC 30190:2016, Information technology – Digitally recorded media for information
interchange and storage – 120 mm Single Layer (25,0 Gbytes per disk) and Dual Layer (50,0
Gbytes per disk) BD Recordable disk
ISO/IEC 30191, Information technology – Digitally recorded media for information interchange
and storage – 120 mm Triple Layer (100,0 Gbytes single sided disk and 200,0 Gbytes double
sided disk) and Quadruple Layer (128,0 Gbytes single sided disk) BD Recordable disk
ISO/IEC 30192, Information technology – Digitally recorded media for information interchange
and storage – 120 mm Single Layer (25,0 Gbytes per disk) and Dual Layer (50,0 Gbytes per
disk) BD Rewritable disk
ISO/IEC 30193, Information technology – Digitally recorded media for information interchange
and storage – 120 mm Triple Layer (100,0 Gbytes per disk) BD Rewritable disk
3 Terms, definitions and abbreviated terms
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp

– 8 – IEC 62702-1-2:2017 © IEC 2017
3.1 Terms and definitions
3.1.1
B Life
mig
lifetime for use of data migration and identical to B Life which is 0,000 001 quantile of

0,000 1
the lifetime distribution (i.e. 0,000 1 % failure time) or 99,999 9 % survival lifetime distribution
(i.e. 0,000 1 % failure time) or 99,999 9 % survival lifetime
[SOURCE: ISO/IEC 29121:2017, 3.1, modified – Note 1 to entry deleted.]
3.1.2
B Life
5 percentile of the lifetime distribution (i.e. 5 % failure time) or 95 % survival lifetime
[SOURCE: ISO/IEC 16963:2017, 3.4]
3.1.3
(B Life)
5 L
95 % lower confidence bound of B Life
[SOURCE: ISO/IEC 16963:2017, 3.5]
3.1.4
B Life
50 percentile of the lifetime distribution (i.e. 50 % failure time) or 50 % survival lifetime
[SOURCE: ISO/IEC 16963:2017, 3.6]
3.1.5
Controlled storage-condition
well-controlled storage conditions with full-time air conditioning (Temp=25 °C and RH= 50 % )
which can extend the lifetime of data stored on optical disks
[SOURCE: ISO/IEC 16963:2017, 3.7]
3.1.6
data migration
process to copy data from one storage device or medium to another
[SOURCE: ISO/IEC 29121:2017, 3.5]
3.1.7
error rate
rate of errors on the recorded disk measured before error correction is applied
[SOURCE: ISO/IEC 29121:2017, 3.7]
3.1.8
initial performance test
test of the recording performance of data recorded on a disk before storing
[SOURCE: ISO/IEC 29121:2017, 3.8]
3.1.9
lifetime
time that information is retrievable in a system

[SOURCE: ISO/IEC 29121:2017, 3.9]
3.1.10
periodic performance test
periodic test of the recording performance of data recorded on a disk during the storage
[SOURCE: ISO/IEC 29121:2017, 3.15]
3.1.11
retrievability
ability to recover physical information as recorded
[SOURCE: ISO/IEC 29121:2017, 3.16]
3.1.12
system
combination of hardware, software, storage medium and documentation used to record,
retrieve and reproduce information
[SOURCE: ISO/IEC 16963:2017, 3.20]
3.1.13
uncorrectable error
error in the playback data that could not be corrected by the error correcting decoders
[SOURCE: ISO/IEC 29121:2017, 3.19]
3.1.14
X Life
mig
X
mig
migration interval (year) that is determined by user
[SOURCE: ISO/IEC 29121:2017, 3.20, modified – Note 1 to entry deleted.]
3.2 Abbreviated terms
Max RSER  Max Random Symbol Error Rate
4 Disk and lifetime for long t
...