Overview
IEC TR 63475:2023 - Overview of Universal Archival Disk Format (UADF) defines a universal volume and file format intended to enable reliable interchange of files on archive storages in personal computing and home entertainment environments. The Technical Report explains why varied media (HDD, SSD, optical discs, SD cards, flash drives, tape) and disparate DRM, file-system and device compatibility issues create long-term data-access risks, and it describes a UADF-based volume/file structure and system features to improve long-term preservation, interoperability and ease of use.
Key topics and technical requirements
The report focuses on practical architectural and format elements rather than implementation specifics. Key topics include:
- Universal volume and file format (UADF) for exchanging archived data across media types and devices.
- Volume concepts: volumes, physical/logical volumes, partitions, multi-volume, container, expandable operational volumes, segments and long allocation descriptors (long_ad).
- Data archive system features:
- Treating heterogeneous storage as a single logical archive to remove manual allocation complexity.
- File rearrangement tools and guidelines to migrate existing files into the archive.
- Digital Rights Management (DRM) considerations for preserving and playing protected A/V content.
- External media management and support for multi-volume and ISO-file style disk images.
- Data security: safety, confidentiality and encryption considerations to mitigate ransomware and unauthorized access.
- Data deduplication and storage efficiency approaches.
- Query-by-example (QBE) graphical user interface (GUI) for simplified archive retrieval.
- Layered system design: user interface layer, middleware, file system layer, and volume layer (with LVM and multi-volume support) to enable scalability and robustness.
Applications and target users
UADF is targeted at stakeholders who need reliable long-term storage and interchange of personal and home-entertainment data:
- Consumer device and CE manufacturers (set-top boxes, NAS, media players) seeking cross-device content portability.
- Software vendors and middleware developers building archive systems, migration tools or GUIs for end users.
- Home and small-office users and IT administrators aiming for durable personal data preservation and simplified media management.
- Archivists and service providers offering consumer-oriented long-term backup and media consolidation services.
Practical benefits include improved file-system compatibility across generations of devices, easier migration of legacy media, reduced data loss due to media obsolescence, and safer management of DRM-protected content.
Related standards
- ISO 9660 and ISO/IEC 13346 (referenced in the report for ISO-file concepts)
- Universal Disk Format (UDF) concepts are relevant when interoperating with existing disk-image standards.
Keywords: IEC TR 63475:2023, UADF, Universal Archival Disk Format, archive storage, file format, long-term preservation, DRM, data archive system, volume format, file system compatibility.