IEC 62702-1-1:2022

IEC 62702-1-1 ®
Edition 2.0 2022-06
REDLINE VERSION
INTERNATIONAL
STANDARD
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inside
Audio archive system –
Part 1-1: DVD disk and data migration for long-term audio data storage

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IEC 62702-1-1 ®
Edition 2.0 2022-06
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Audio archive system –
Part 1-1: DVD disk and data migration for long-term audio data storage
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160.30; 35.220.30 ISBN 978-2-8322-3915-5

– 2 – IEC 62702-1-1:2022 RLV © IEC 2022
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Disk and lifetime for long-term audio data storage . 10
4.1 Disk for long-term audio data storage . 10
4.2 Lifetime estimation . 10
4.3 B life for long-term audio data storage . 11
mig
4.4 Estimated-lifetime rank and display colour . 12
4.4.1 Estimated-lifetime rank and display colour identification . 12
4.4.2 B life and display colour indication on disks and packages . 12
mig
5 Test condition, test methods and disks for audio data migration . 12
5.1 Ambient conditions for testing of maximum data error measurement . 12
5.2 Test methods . 13
5.2.1 Playback test drive . 13
5.2.2 Test area of recorded and sample disk . 13
5.2.3 Recording test drive . 13
5.2.4 Test drive calibration check . 14
6 Test result evaluation . 14
6.1 Initial performance test result evaluation . 14
6.2 Periodic performance test result evaluation . 14
6.3 Report items . 17
6.3.1 Initial performance test result . 17
6.3.2 Periodic performance test result . 17
6.4 Management of report item . 17
6.5 Test and migration intervals . 17
7 Prevention of deterioration . 18
Annex A (informative) Guidelines for usage and indication . 19
A.1 Usage of lifetime rank . 19
A.2 Lifetime rank indication and place . 19
A.2.1 Lifetime rank indication . 19
A.2.2 Indication example . 19
Annex B (informative) Recommendations on handling, storage and cleaning conditions
for DVD-R, DVD-RW, DVD-RAM, +R format, and +RW format disks . 20
B.1 Handling . 20
B.2 Storage . 20
B.3 Cleaning . 21
Annex C (informative) Guidelines for disk history record . 22
Bibliography . 29

Figure 1 – Data migration flow for DVD-R, DVD-RW, DVD-RAM, +R format, and +RW
format disks . 16
Figure A.1 – Indication example . 19

Table 1 – Category of initial recording performance . 14
Table 2 – Category of recording performance at periodic performance test . 15
Table B.1 – Recommended conditions for general storage . 20
Table B.2 – Recommended conditions for controlled storage . 20
Table C.1 – Sectors of the disk history file . 23
Table C.2 – Byte content of sector 0 to 7 of the disk history file . 24
Table C.3 – Byte format of sector 8 to 15 and 9 to the following of the disk history file . 26

– 4 – IEC 62702-1-1:2022 RLV © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUDIO ARCHIVE SYSTEM –
Part 1-1: DVD disk and data migration
for long-term audio data storage

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
This redline version of the official IEC Standard allows the user to identify the changes made to
the previous edition IEC 62702-1-1:2016. A vertical bar appears in the margin wherever a change
has been made. Additions are in green text, deletions are in strikethrough red text.

IEC 62702-1-1 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. It is an International Standard.
This second edition cancels and replaces the first edition published in 2016. This edition
constitutes a technical revision.
In order to reflect the updates to ISO/IEC 29121:2021, this edition includes the following
significant technical changes with respect to the previous edition:
a) ISO/IEC 16963 has been identified as the referee test method for the estimation of lifetime;
b) the ambient conditions for the measurement of maximum data error have been added;
c) the requirements for test drives have been changed considering the use condition of users;
d) the requirements for the estimated lifetime have been defined more clearly;
e) the requirements for the periodic performance test have been defined more clearly.
The text of this International Standard is based on the following documents:
Draft Report on voting
100/3670/CDV 100/3742/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
A list of all parts in the IEC 62702 series, published under the general title Audio archive system,
can be found on the IEC website.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under 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.
IMPORTANT – The "colour inside" logo on the cover page of this document 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 62702-1-1:2022 RLV © IEC 2022
INTRODUCTION
Sound recordings such as music, speech, and storytelling are an important human heritage and
should be preserved for as long as possible. However, we were not able to record sounds in
order to preserve them in the past. The first recording system, the phonautograph, was invented
by Édouard-Léon Scott de Martinville in 1860 and, after that, Thomas Alva Edison invented the
recording and playback system known as the phonograph 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 of storage device.
The progress of LSI (Large-Scale Integrated Circuit) technology made digital recording of
recorded sound possible. 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 non-volatile memory (such as phase-change memory).
This International Standard specifies physical and logical aspects for standards of audio
archives of various storage types which are typically used for audio archives on the market.
The IEC 62702 series currently consists of:
• Part 1 specifies the minimum requirements on physical aspects of optical disks for digital
sound recordings. Part 1-1 specifies DVD optical disks, and Part 1-2 specifies BD optical
disks.
NOTE DVD optical disks include DVD-R disk, DVD-RW disk, DVD-RAM disk and +R format disk, +RW format
disk. BD optical disks include BD recordable disk and BD rewritable disk.
• Part 2 specifies the minimum requirements for digitization of content, format of digitised
content, content information and media inspection.

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

1 Scope
This part of IEC 62702 specifies a method of data-quality assurance for writable DVD disks
(hereafter referred to as "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 recordable disks such as DVD-R, and +R format, and
rewritable disks such as DVD-RW, +RW format and DVD-RAM.
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 16448:2002, Information technology – 120 mm DVD – Read-only disk
ISO/IEC 16963:2017, Information technology – Digitally recorded media for information
interchange and storage – Test method for the estimation of lifetime of optical media disks for
long-term data storage
ISO/IEC 29121:20132021, Information technology – Digitally recorded media for information
interchange and storage – Data migration method for DVD-R, DVD-RW, DVD-RM, +R, and +RW
disks optical disks for long-term data storage
3 Terms and definitions
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 https://www.iso.org/obp
3.1
B life
mig
lifetime (3.10) for use of data migration (3.6) and identical to B life, which is 0,000 001
0,000 1
quantile of the lifetime distribution (i.e. 0,000 1 % failure time) or 99,999 9 % survival lifetime
[SOURCE: ISO/IEC 29121:2021, 3.1]

– 8 – IEC 62702-1-1:2022 RLV © IEC 2022
3.2
B life
5 percentile of the lifetime (3.10) distribution (i.e. 5 % failure time) or 95 % survival lifetime
[SOURCE: ISO/IEC 16963:2017, 3.4]
3.3
(B life)
5 L
95 % lower confidence bound of B life (3.2)
[SOURCE: ISO/IEC 16963:2017, 3.5]
3.4
B life
50 percentile of the lifetime (3.10) distribution (i.e. 50 % failure time) or 50 % survival lifetime
[SOURCE: ISO/IEC 16963:2017, 3.6]
3.5
controlled storage condition
well-controlled storage conditions with full-time air conditioning (25 °C and 50 % relative
humidity) in which the lifetime (3.10) of data stored on optical media may be extended disks
Note 1 to entry: Refer ISO/IEC 16963.
[SOURCE: ISO/IEC 16963:2017, 3.7]
3.6
data migration
process to copy data from one storage device or medium to another
[SOURCE: ISO/IEC 29121:2021, 3.5]
3.7
error correction code
ECC
mathematical computation yielding check bytes used for the detection and correction of errors
in data
Note 1 to entry: For DVD-R, DVD-RW, DVD-RAM, +R format, and +RW format disks, the Reed-Solomon product
code defined in ISO/IEC 16448:2002 for DVD-ROM systems is applied.
Note 2 to entry: This note applies to the French language only.
[SOURCE: ISO/IEC 29121:2021, 3.6 modified — Note 1 to entry has been shortened to apply
only to DVDs.]
3.8
error rate
rate of errors or error count on the recorded disk measured before on the signal at the input of
error-correction decoder is applied, which represents raw-error rate of data recorded on a disk
[SOURCE: ISO/IEC 29121:2021, 3.7]

3.9
initial performance test
first test of the recording performance error rate (3.8) of data recorded on a disk before storing
[SOURCE: ISO/IEC 29121:2021, 3.8]
3.10
lifetime
time that information is retrievable in a system (3.17)
[SOURCE: ISO/IEC 29121:2021, 3.9]
3.11
maximum byte-error rate
BER max BER
max
maximum greatest level of byte error rate at any consecutive 32 error correction code (3.7)
blocks on a in one of relevant area of the disk as measured in the first pass of the decoder
before correction
Note 1 to entry: BER max BER is applied to DVD-RAM disks.
max
Note 2 to entry: This note applies to the French language only.
[SOURCE: ISO/IEC 29121:2021, 3.10]
3.12
maximum data error
greatest level of error rate (3.8) anywhere in one of the relevant areas on the disk
[SOURCE: ISO/IEC 16963:2017, 3.13, modified — Note 1 to entry has been deleted.]
3.13
maximum parity inner sum 8
PIE SUM 8 max PI
sum 8,max
maximum inner parity greatest level of parity (of the) inner code error count at any consecutive
8 error correction code (3.7) blocks on a in one of the relevant areas of the disk as measured
in the first pass of the decoder before correction
Note 1 to entry: PIE SUM 8 max is applied to DVD-R, DVD-RW, +R, and +RW disks.
Note 2 to entry: This note applies to the French language only.
Note 1 to entry: See ISO/IEC 16448, ISO/IEC 23912, ISO/IEC 17341, ISO/IEC 17342 and ISO/IEC 17344.
[SOURCE: ISO/IEC 29121:2021, 3.13]
3.14
periodic performance test
periodic test of the recording performance error rate (3.8) of data recorded on a disk during the
storage
[SOURCE: ISO/IEC 29121:2021, 3.15]
3.15
retrievability
ability to recover physical information as recorded
[SOURCE: ISO/IEC 16963:2017, 3.14]

– 10 – IEC 62702-1-1:2022 RLV © IEC 2022
3.16
substrate
transparent layer of the disk, provided for mechanical support of the recording or recorded layer,
through which the optical beam accesses the recordable/recorded layer
[SOURCE: ISO/IEC 16448:2002, 4.18]
3.17
system
combination of hardware, software, storage medium and documentation used to record, retrieve
and reproduce information
[SOURCE: ISO/IEC 16963:2017, 3.20]
3.18
uncorrectable error
error in the playback read-out data that could not be corrected by the error correcting decoders
[SOURCE: ISO/IEC 29121:2021, 3.18]
3.19
X Life interval
mig
migration interval (year) which is determined by user
[SOURCE: ISO/IEC 29121:2021, 3.19 modified — Note 1 to entry has been deleted.]
4 Disk and lifetime for long-term audio data storage
4.1 Disk for long-term audio data storage
A disk with a specified lifetime should be used for long-term audio data storage. A disk with an
unspecified lifetime should not be used.
4.2 Lifetime estimation
For the purposes of this document, the lifetime of a disk shall be derived from the measurements
specified in ISO/IEC 16963. The Eyring method is used for lifetime estimation under controlled
storage conditions (25 °C and 50 % relative humidity).
In ISO/IEC 16963, the estimated lifetime can be defined variously as B life, B life and the
50 5
95 % lower confidence bound of B life [equals (B life) ], and described as follows.
5 5 L
ˆ ˆ ˆˆ
B exp lnB exp β++βx β x
( ) ( )
50 life 50 0 1 10 2 20
ˆˆ ˆ
ˆ
B exp lnB exp β++βx β x−1,64σˆ
( )
( )
5 life 5 0 1 10 2 20
Where
B is the variable for B life;
50 life 50
B is the variable for B life;
5 life 5
x and x are the temperature-dependent factor and the relative-humidity-dependent factor
10 20
at the controlled storage conditions (25 °C/50 % relative humidity), respectively.
= =
= =
Also, the 95 % lower confidence bound of B life becomes:
ˆ
ˆ
(B Life) ≅ exp(lnB −1,64σ ) .
5 L

 
ˆˆ ˆ
B exp lnBBexp ln−1,6l4 var nB
( ) ( )
(5 life)L 5 5 5

 L 

where
B is the variable for (B life) ;
(5 life)L 5 L
ˆ ˆˆ
ˆ
and estimated variance of residual errors σ ˆ are obtained using regression
β ,,ββ σ
0 12
analysis of time-to-failure data.
4.3 B life for long-term audio data storage
mig
The estimated lifetime of B life means 5 % of the products reach failure. It is widely used in
other contexts. However, from the viewpoint of the reliability of long-term audio storage to retain
the integrity of the original data, it is not appropriate to use B life as the estimated lifetime
when determining a test interval and deciding on data migration.
In the case of audio data migration, it is necessary to have a sufficiently low failure probability.
The time at which one millionth of the products reach failure shall define, in this document, the
estimated lifetime to determine test intervals and the migration interval. B life is 0,000 001
0,000 1
quantile of the lifetime distribution (i.e. 0,000 1% failure time) and expressed as B life in this
mig
document. B life can be calculated using B life and B life as follows (see also
mig 50 5
ISO/IEC 29121:20132021, Annex E).
ˆ ˆ
 
ln B − ln B
ˆ ˆ 50 5
ˆ  
B Life =exp(ln B −4,75σ )=exp ln B − 4,75
0,000 1 50 50
 
1,64
 
ˆˆ
lnBB− ln
50 5
ˆ ˆ ˆ
B explnB explnB−=4,75σBexpln−4,75
ˆ
( ) ( ) 
0,000 1 life 0,000 1 50 50

1,64

ˆˆ
exp 2, 9 lnB − 1, 9 lnB
( )
5 50
where
B is the variable for B life;
0,000 1 life 0,000 1
= = =
= =
– 12 – IEC 62702-1-1:2022 RLV © IEC 2022
Thus
ˆ ˆ
B Life = B Life = exp(2,9 ln B − 1,9 ln B )
mig 0,000 1 5 50
ˆˆ
B ××24 365 B exp 2, 9 lnB− 1, 9 lnB
( )
mig life 0,000 1 life 5 50
where
B is the variable for B life in years.
mig life mig
In actual storage conditions, the temperature and relative humidity may can deviate from the
controlled storage condition of 25 °C and 50 % relative humidity, which changes the estimated
lifetime. In this case, the estimated lifetime should be adjusted according to the estimated
lifetime at the actual storage conditions, as specified in ISO/IEC 29121:20132021, Annex D.
4.4 Estimated-lifetime rank and display colour
4.4.1 Estimated-lifetime rank and display colour identification
For audio data migration, rank of B life and its identifying display colour are defined as follows.
mig
B life is over 30 years, the display colour is red.
mig
B life is over 60 years, the display colour is green.
mig
B life is over 100 years, the display colour is gold.
mig
Guidelines for use of the ranks of B life and their display colours are shown in Annex A.
mig
4.4.2 B life and display colour indication on disks and packages
mig
life, its display colour and the reference-controlled storage condition shall be
The rank of B
mig
indicated on both the disk and the packaging, excluding a two-sided disk. Indication examples
for ranks and their colours are shown in Annex A.
5 Test condition, test methods and disks for audio data migration
5.1 Ambient conditions for testing of maximum data error measurement
When performing recordings or playbacks, the air immediately surrounding the disk should have
the following properties:
Recording condition 20 °C to 45 °C
Playback condition
20 °C to 45 °C
The ambient condition is the surrounding condition in a room where a test drive is located. The
ambient conditions for the PI and BER measurements are as follows:
sum 8,max max
Temperature 15 °C to 30 °C
Relative humidity 20 % to 75%
==
5.2 Test methods
5.2.1 Playback test drive
For DVD-R disks, DVD-RW disks, +R format disks, and +RW format disks, the test drive shall
have the capability to measure PI .
sum 8,max
For DVD-RAM disks, the test drive shall have capability to measure BER .
max
The test drive shall have the capability to evaluate the error rate level specified in the initial
performance test and the periodic performance test.
The playback speed of the test drive should be:
for DVD-R, DVD-RW, +R format, and +RW format disks 4 × CLV (constant linear velocity), or
6 × CLV
for DVD-RAM disk 2 × CAV (constant angular velocity),
3 × CAV, or 5 × CAV
5.2.2 Test area of recorded and sample disk
The test area is the recorded area to be tested in a disk.
The whole recorded area of all disks shall be tested for the initial performance test.
The whole recorded data area of all disks should be tested for the periodic performance test.
Although the integrity of the data becomes lower, the user may reduce the test area and/or the
number of sample disks based on a certain sampling method, considering the value of the
information (see ISO/IEC 29121:2021, Annex G). For the reduction of test area, see
ISO/IEC 16963:2017, 7.5 for additional information. The number of sample disks should be
enough to guarantee statistical effectiveness. If the sample disks have different attributes such
as disk standards, recording conditions or storage conditions, the disks should be divided into
groups of disks considering the attributes so that the sampling can be applied on each group
with statistical effectiveness.
In case of a DVD-RAM disk, the replaced data in the defect management area, instead of the
defect data in the user area, should be tested.
5.2.3 Recording test drive
There are two cases for the test drive. The first is that the drive serves as both a test drive and
a recorder that records the data on the disk. The second is that the test drive is different from
the recorder. For both cases, the data recorded on the disk by the recorder shall fulfil the error
rate level specified in the initial performance test and the periodic performance test.
The recording speed of the test drive should be:
For DVD-R, DVD-RW, +R format and +RW format disks 4 × CLV or 6 × CLV
For a DVD-RAM disk 2 × CAV, 3 × CAV or 5 × CAV

The test drive should implement the multi-session and multi-border method for the DVD-R and
+R format recordable disks and the DVD-RW rewritable disk. Archive data shall be recorded in
the first session or border. The history information can be recorded on the second or subsequent
session or border.
– 14 – IEC 62702-1-1:2022 RLV © IEC 2022
The test drive should implement the incremental write method for the DVD-RAM and +RW
format rewritable disks. Data can be written to the formatted disk by simply recording files. The
history information can be recorded on the disk as an additional file record.
5.2.4 Test drive calibration check
The playback and recording test drive(s) shall be calibrated by using a calibration disk prepared
by the test drive manufacturer and using the calibration procedure specified by the manufacturer.
The calibration shall be done at the intervals recommended by the manufacturer.
The test drive shall be checked by using a reference disk prepared by the test drive
manufacturer or the disk prepared by the user, so that it fulfils the requirements in 5.2.1, 5.2.2
and 5.2.3. When using a reference disk prepared by the test drive manufacturer, the check of
the test drive shall be done at the intervals recommended by the manufacturer. When using a
disk prepared by the user, it is recommended for the user to set an appropriate interval and to
check the test drive at the interval.
6 Test result evaluation
6.1 Initial performance test result evaluation
When data are recorded on disks, the initial recording performance on the whole recorded area
shall be checked. The initial recording performance shall be categorized as Levels 1, 2 and or
3 using PIE SUM PI for DVD-R, DVD-RW, +R format, and +RW format disks, and
8max sum 8,max
BER max BER for DVD-RAM as shown in Table 1.
max
At the least, the initial recording performance shall be within the limits of Level 1. Disks showing
the initial recording performance of Level 2 should not be used for long-term audio data storage,
and those of Level 3 are out of the specification and shall not be used.
If the initial recording performance is worse than Level 1, the performance of the drive used for
recording the data should be verified because PIE SUM 8 PI and BER max BER
max sum8,max max
depend on the performance of both disks and drives. If the drive is not good, the drive should
be replaced. If the disk is not good, another batch of disks should be used.
Table 1 – Category of initial recording performance
DVD-R, DVD-RW,
DVD-RAM
Level Status +R format, +RW format
BER max
PIE SUM 8 max
−4
1 Recommended < 140
< 5,0 × 10
−4 −3
2 Should not be used 140 to 280
5,0 × 10 to 1,0 × 10
−3
3 Shall not be used > 280
> 1,0 × 10
PI BER
Maximum data error
sum 8,max max
6.2 Periodic performance test result evaluation
Disks used for storing data should be periodically checked with the test interval described in
6.5. The recording performance at the periodic performance test is categorized in Levels 4, 5
and 6 using PIE SUM PI for DVD-R, DVD-RW, +R format, and +RW format disks,
8 max sum 8, max
and BER max BER for DVD-RAM disk as shown in Table 2.
max
If the recording performance is within Level 4, the disk is good enough to continue to be stored.

If the recording performance is within Level 5, the data stored on the disk shall be migrated to
another disk as soon as possible.
If the recording performance is in Level 6, the data stored on the disk shall be copied to another
disk immediately, as far as the data can be retrieved.In Level 6, PIE SUM PI and
8 max sum 8, max
BER max BER are high enough that the retrieved data may can contain uncorrectable errors.
max
Table 2 – Category of recording performance at periodic performance test
Level Status DVD-R, DVD-RW, DVD-RAM
R format, RW format
PIE SUM 8 max BER max
−4
4 Use as it is < 200
< 7,1 × 10
−4 −3
5 Migrate data as soon as possible 200 to 280 to 1,0 × 10
7,1 × 10
−3
6 Migrate data immediately > 280
> 1,0 × 10
PI BER
Maximum data error
sum 8,max max
Data migration flow for the initial performance test and periodic performance test is shown in
Figure 1.
– 16 – IEC 62702-1-1:2022 RLV © IEC 2022
Disk
Level 3: Shall not use
PIE SUM 8 max or
Level 2: Should not use
BER max
Test drive
Level 1: Recommend to use
Initial
Data are recorded and
performance test
Disk
Level 6: Migrate data immediately
PIE SUM 8 max or
Level 5: Migrate data as soon as possible
BER max
Test drive
Periodic
Level 4: Use as it is
IEC
performance test
Figure 1 – Data migration flow for DVD-R, DVD-RW,
DVD-RAM, +R format, and +RW format disks

6.3 Report items
6.3.1 Initial performance test result
The date and year of the initial test, the measured errors result, and the evaluation result shall
be reported as part of the history of this disk. The disk type and manufacturer name, the
specified rank of disk, and the next testing year and date should be reported. Moreover, the
test drive manufacturer, model name and serial number should be reported.
6.3.2 Periodic performance test result
At each periodic test, the date and year of the test, the measured errors result, and history of
evaluation results shall be reported. The disk type and manufacturer name, and the specified
rank of the disk should be reported. Moreover, the test drive manufacturer, model name and
serial number should be reported.
6.4 Management of report item
Report items shall be reported to the host computer.
Report items should be recorded on the disk, which can then be used (see Annex C).
6.5 Test and migration intervals
In this document, the test interval between periodic performance tests shall be is set at half of
B life. Therefore, the test interval for each rank of disk with display colour red, green and
mig
gold will be 15 years, 30 years, and 50 years, respectively.
If a disk with an unspecified lifetime is used, it should be tested every three years or less.
If B life is not available as shown below, the test interval should be three years or less. A
mig
greater test interval causes the risk of data loss and failure in the data migration. If such a risk
is unacceptable, a test interval of three years or less is strongly recommended.
– The estimated lifetime data is not provided.
– The estimated lifetime data is provided but lacks the statistical accuracy.
Generational changes of the system, including reading devices, file structures and applications,
which occur during the normal migration interval, may can affect readability in addition to the
quality of the disk itself. For safety, or if the stored data has high value, the user may choose
shorter intervals for testing and migration.
In consideration of these factors, the migration interval is defined as X (years) interval and

mig
this value shall be determined by the user of this part (see ISO/IEC 29121:2021, Annex F).
X is the variable for X interval, and B is the variable for B life in years.
mig mig mig life mig
Actual test interval and data migration using B (herein after B ) and X are as follows.
mig life mig mig
a) If X − B /2 is larger than 0, then the test interval of the first periodic performance
mig mig life
test is B /2 years, and the storage is continued. (See Annex F in ISO/IEC 29121:2013.)
mig life
b) If X − B /2 is less than or equal to 0, then the test interval of the first periodic
mig mig life
performance test is X (years), and the data migration is carried out regardless of the test
mig
result.
– 18 – IEC 62702-1-1:2022 RLV © IEC 2022
If the test interval is very long, for instance over ten years, a sampling check of the stored disks
should be carried out at shorter intervals. The occurrence of retrievability problems or long read
times may can indicate an immediate need for detailed testing.
When tests indicate deterioration of one disk, additional tests may be performed on other disks
of the same type, age, or batch to ascertain their condition. Replacement of all similarly affected

disks should be considered if such additional tests indicate significant problems.
7 Prevention of deterioration
Necessary precautions shall be taken to reduce the possibility of deterioration in order to ensure
the integrity of the disks during their use, storage, handling, or transportation. Causes of
deterioration and their effects are indicated in Annex B. For long-term audio storage, the
recommendations in Annex B should be implemented.

Annex A
(informative)
Guidelines for usage and indication
A.1 Usage of lifetime rank
This annex describes how to choose the disk rank which is most desirable as audio information
storage.
a) Display colour: red, (indicated B life is over 30 years)
mig
A disk of this rank may be used for general purpose storage of audio information.
b) Display colour: green, (indicated B life is over 60 years)
mig
A disk of this rank may be used for long-term audio information storage or important audio
information.
c) Display colour: gold, (indicated B life is over 100 years)
mig
A disk of this rank may be used for especially important audio information or historically
valuable audio information.
A.2 Lifetime rank indication and place
A.2.1 Lifetime rank indication
Disk and/or disk packages should display the specified lifetime rank and display colour. Two-
sided disks should display the specified lifetime rank and display colour on the packaging only.
A.2.2 Indication example
Figure A.1 shows typical indication examples together with B life, display colour and storage
mig
condition for reference.
Figure A.1 – Indication example

– 20 – IEC 62702-1-1:2022 RLV © IEC 2022
Annex B
(informative)
Recommendations on handling, storage and cleaning conditions
for DVD-R, DVD-RW, DVD-RAM, +R format, and +RW format disks
B.1 Handling
Disks intended for long-term audio storage should not be left in readers, nor remain exposed to
light, corrosive atmospheres or solvents, or to extremes of temperature or humidity.
The fragile protective coating on the label surface is vulnerable to damage and should be
protected together with the readout surface. Carefully handle the disk, touching only the outer
edge and inner hole. Never touch the readout surface.
Disks should not be subjected to mechanical stresses that might tend to distort the disk.
Disks should be protected from dust and debris. This is especially important for recordable and
rewritable disks during the recording process. The use of a deionizing environment is
recommended to neutralize static charges on the disk that can attract and retain loose
contaminants.
B.2 Storage
For temporary storage such as in an office environment, the storage environment should be
limited to the ranges given in Table B.1.
Table B.1 – Recommended conditions for general storage
Ambient condition Recommended range
Temperature 5 °C to 30 °C
Relative humidity 15 % to 80 %
3 3
Absolute humidity
1 g/m to 24 g/m
Atmospheric pressure 75 kPa to 106 kPa
Temperature gradient 10 °C per hour maximum
Relative humidity gradient 10 % per hour maximum

For long-term storage, conditions should be more tightly controlled, and the storage
environment should be limited to the ranges given in Table B.2.
Table B.2 – Recommended conditions for controlled storage
Ambient condition Recommended range
Temperature 10 °C to 25 °C
Relative humidity 30 % to 50 %
3 3
Absolute humidity
3 g/m to 12 g/m
Atmospheric pressure 75 kPa to 106 kPa
Temperature gradient 10 °C per hour maximum
Relative humidity gradient 10 % per hour maximum

Conditions that could form condensation of moisture on the disk should be avoided. Cool and
dry storage conditions are preferred. To maintain the desirable temperature and humidity
fluctuation tolerance levels, and to protect against high intensity light and pollutants, DVD-R,
DVD-RW, DVD-RAM, +R format, and +RW format disks should be stored vertically in clean
insulated containers. Dust or debris in operational or storage locations should be minimized by
appropriate maintenance and monitoring procedures, especially when recording disks.
B.3 Cleaning
Prior to performing cleaning operations of disks containing useful data, tests should be carried
out on disks of the same type and from the same supplier that do not contain any useful data,
in order to ensure that no adverse reaction will occur.
Loose contaminants may can be removed by short, one-second bursts of clean, dry air, avoiding
expulsion of cold propellants. If the manufacturer has not supplied any cleaning information,
organic polymer substrate disks can be cleaned using a lint-free cloth of a non-woven fabric
and either clean or soapy water. Do It is recommended not use detergents or solvents such as
alcohol. All wiping actions should be in a radial direction, taking care not to exert isolated
pressure or to scratch the disks. Never It is strongly recommended not to use abrasives. Do It
is recommended not to use acryli
...