Overview
IEC 62702-1-2:2017 - "Audio archive system – Part 1-2: BD disk and data migration for long-term audio data storage" is an international standard that defines data-quality assurance and migration methods for writable Blu‑ray Disks (BD Recordable and BD Rewritable) intended for long‑term audio preservation. The document covers both physical and logical aspects of using BD optical media in audio archives and establishes procedures to estimate media lifetime and to manage periodic data migration so recorded audio remains recoverable over time.
Key topics
- Scope and media types: Applies specifically to BD recordable and BD rewritable disks used in long‑term audio archives.
- Lifetime estimation (B‑Life): Defines how to estimate media lifetime and express lifetime rankings used to plan migration and replacement cycles.
- Test methods and conditions: Specifies ambient conditions, test areas on recorded disks, test drive calibration and methods for initial and periodic performance tests (including reporting and result evaluation).
- Data migration workflow: Details the expected flow for initial validation and periodic migration to ensure bit‑level integrity during storage and copying.
- Reporting and management: Lists required reporting items, test intervals, and how to manage records of media condition and migration history.
- Prevention and handling: Includes practical guidance on prevention of deterioration plus informative annexes with handling, storage and cleaning recommendations and causes/nature of BD deterioration.
- Identification: Defines lifetime rank and display-colour identification for disks and packaging to support archive management.
Applications
IEC 62702-1-2 is intended for organizations and professionals responsible for long‑term audio preservation:
- Audio archivists, libraries and museums preserving music, speech and oral histories.
- Broadcasters and record labels managing master audio assets and migration workflows.
- Preservation engineers and IT/storage teams designing QA testing, migration schedules and media inventories.
- Vendors of archival storage solutions and BD media who need to demonstrate conformity with recognized archival practices.
Practical uses include selecting BD media for archives, implementing test-and-migrate procedures, documenting media lifetime ranks, planning migration intervals, and adopting handling/storage best practices to minimize data loss.
Related standards
- ISO/IEC 16963 - test method for lifetime estimation of optical disks
- ISO/IEC 29121 - data migration method for long‑term optical disk storage
- ISO/IEC 30190–30193 - specifications for BD recordable and rewritable formats
- IEC 62702-1 and IEC 62702-2 - companion parts covering physical DVD/BD requirements and digitization/content format for audio archives
Keywords: IEC 62702-1-2, Blu‑ray (BD) disk, data migration, long‑term audio storage, audio archive system, B‑Life, lifetime estimation, optical disk preservation.