Overview
ISO/IEC 10885:1993 defines an international standard for a 356 mm optical disk cartridge intended for information interchange in a write-once, read-many (WORM) format. The standard specifies vocabulary and mandatory requirements covering the physical cartridge (caddy and carrier), the optical disk, test and operating environments, optical and recording characteristics, and the on-disk track and sector format to ensure physical interchangeability between data-processing systems.
Key topics and technical requirements
- Physical and mechanical characteristics
- Definitions for caddy, carrier, hub, perimeter ring and clamping zones
- Dimensional drawings and tolerances for caddy, carrier and disk components
- Materials, mass, balance, and handling (drop and dead-weight tests)
- Optical and recording characteristics
- Support for disks with 90 µm or 1.2 mm protective layers
- Baseline reflectance, read power and write power specifications
- Definitions of marks, protective layer, recording layer and tilt
- Data organization and formatting
- Band and track layout, track pitch, radial positioning and rotational velocity
- Sector organization, user sector format, leader/test sectors and disk ID sector
- Requirements for read/write interchangeability and sector-level layout
- Error control and signal quality
- Error detection and mitigation: CRC, EDAC, ECC and Reed–Solomon coding
- Interleaving, cross-talk limits, narrow-band signal-to-noise ratio and noise-floor testing
- Environments and testing
- Test, operating and storage environments (short-term, long-term, transportation)
- Annexed test methods for imbalance, runout, read/write power, cross-talk and other signal tests
- Conformance
- A cartridge conforms if it meets all mandatory requirements in this International Standard
Applications
ISO/IEC 10885:1993 supports reliable physical interchange of WORM optical media across systems and suppliers. Typical use-cases:
- Long-term data archiving and retention where immutability is required
- Cross-vendor data interchange between library systems and drives
- Backup and compliance storage for government, finance, healthcare and enterprise archives
- Optical media manufacturing, drive and robotic library design and QA
Who should use this standard
- Optical media and cartridge manufacturers
- Optical drive, autoloader and library designers
- Test and quality engineers for optical storage
- IT procurement and archivists specifying interchange media
- Standards bodies and compliance auditors
Related standards
- Normative reference: ISO/IEC 646 (7-bit coded character set) is cited in the document.
- ISO/IEC 10885 is intended to be used alongside a complementary volume and file-structure standard to enable full data interchange.
Keywords: ISO/IEC 10885:1993, 356 mm optical disk cartridge, write once, WORM, optical media standard, Reed–Solomon, ECC, track layout, caddy, carrier, archival storage.