ISO, IEC Issue Standard for Estimating Archival Life of DVDs
June 6, 2008 // Published as a news service by IHS
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The International Organization for Standardization (ISO) and International Electrotechnical Commission (IEC) issued ISO/IEC 10995 - Information Technology Digitally recorded media for information interchange and storage - Test method for the estimation of the archival lifetime of optical media.
ISO/IEC 10995 specifies an accelerated aging test method for estimating the life expectancy for the retrievability of information stored on recordable or rewritable optical disc.
The standard provides a methodology that includes the testing of newer, currently available products, according to IEC.
This test includes details on the following formats: DVD-R/-RW/-RAM, +R/+RW and it may be applied to additional optical disc formats with the appropriate specification substitutions.
ISO/IEC 10995 covers the following aspects:
- Stress conditions.
- Assumptions.
- Ambient conditions.
- Evaluation system description.
- Specimen preparation.
- Data acquisition procedure.
- Data interpretation.
The methodology includes only the effects of temperature (T) and relative humidity (RH).
It does not attempt to model degradation due to complex failure mechanism kinetics nor does it test for exposure to light, corrosive gases, contaminants, handling and variations in playback subsystems.
Discs exposed to these additional sources of stress or higher levels of T and RH are expected to experience shorter usable lifetimes, said IEC.
It is an outline of steps to estimate the life expectancy value as a function of ambient T and RH and used to determine if a disc will or will not exceed a life expectancy of X-years.
ISO/IEC 10995 was prepared by Ecma International (as ECMA-379) and was adopted under a special "fast track procedure" by the joint technical committee ISO/IEC JTC 1, Information technology, in parallel with its approval by national bodies of ISO and IEC.
Source: International Electrotechnical Commission (IEC).