ISO/IEC 17344:2009

Overview

ISO/IEC 17344:2009 defines the requirements for recordable optical disks using the +R format for 120 mm and 80 mm media (notably capacities of 4.7 Gbytes / 9.4 Gbytes for 120 mm and 1.46 Gbytes / 2.92 Gbytes for 80 mm, with recording speeds up to 16X). The standard specifies mechanical, physical and optical characteristics, data format and recording methods to enable reliable data interchange and drive-to-disk interoperability for write-once/read-many (+R) optical media.

Key topics and technical requirements

• Mechanical and dimensional characteristics: overall dimensions, clamping zone, rim and information zone layouts for both 120 mm and 80 mm disks (annex for 80 mm specifics).
• Optical and substrate properties: reflectivity, substrate thickness, refractive index and related optical tolerances in the information zone.
• Signal and read channel characteristics: recorded/unrecorded signal quality, read channels, wobble/tracking channels and reference drive definitions to ensure consistent readback.
• Data format and error control: frame layout, ID and EDC/IED fields, ECC blocks, scrambler usage, modulation and NRZI conversion for robust error detection and correction.
• Track and sector layout: track pitch, track path, ADIP information (address-in-pregroove), physical sectors, RUN layout and PSN mapping.
• Conformance, testing and environments: conditions for conformance, test/operating/storage environments, transportation and safety/flammability considerations.
• Interchange scope: rules to allow interchange between optical disk drives and, together with a volume/file structure standard, full data interchange between systems.

Applications and who uses this standard

ISO/IEC 17344:2009 is used by:

• Optical media manufacturers (to design +R discs meeting mechanical and optical tolerances).
• Optical drive and firmware engineers (to implement read/write channels, tracking and ADIP handling).
• Test laboratories and QA teams (to validate conformance, signal quality and environmental reliability).
• Software developers and integrators working with low-level disc recording tools and compatibility testing.
• IT archivists and data distribution services that require reliable, interoperable write-once media for distribution, backup and long-term preservation.

Related standards

ISO/IEC 17344:2009 is intended to work together with standards that define volume and file structure to provide complete data interchange. It complements other optical-media and file-system standards used in software, hardware and archival workflows.

Keywords: ISO/IEC 17344:2009, +R format, optical disk, 120 mm, 80 mm, 4.7 Gbytes, 1.46 Gbytes, data interchange, recordable optical media, ADIP, ECC, NRZI, conformance.