M00017509
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ISO/IEC DIS 11976 2008 Edition, February 29, 2008 DATA INTERCHANGE ON 130 MM REWRITABLE AND WRITE-ONCE-READ-MANY ULTRA DENSITY OPTICAL (UDO) DISK CARTRIDGES - CAPACITY: 60 GBYTES PER CARTRIDGE - SECOND GENERATION
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Availability date: 07/14/2021
Description / Abstract:
This Ecma Standard specifies the mechanical, physical, and
optical characteristics of a 130 mm optical disk cartridge (ODC)
that employs thermo-optical Phase Change effects to enable data
interchange between such disks.
This Ecma Standard specifies two types, viz.
— Type RW (Rewritable) provides for data to be written read and
erased many times over the recording surfaces of the disk.
— Type WORM (Write Once Read Many) provides for data once
written to be read a multiplicity of times. This type shall use a
Write Once Read Many times recording material (written marks cannot
be erased and attempted modifications of the written marks are
detectable). Multisession (incremental write operations) recording
may be performed on Type WORM disks.
The disk shall be two-sided with a nominal capacity of 30,0
Gbytes per side and the cartridge (two sides) shall provide a
nominal capacity of 60,0 Gbytes.
This Ecma Standard specifies
— the conditions for conformance testing and the Reference
Drive;
— the environments in which the cartridges are to be operated
and stored;
— the mechanical, physical and dimensional characteristics of
the cartridge so as to provide mechanical interchangeability
between data processing systems;
— the format of the information on the disk, both embossed and
user-written, including the physical disposition of the tracks and
sectors, the error correction codes, the modulation methods
used;
— the characteristics of the embossed information on the
disk;
— the thermo-optical characteristics of the disk, enabling
processing systems to write data onto the disk; — the minimum
quality of user-written data on the disk, enabling data processing
systems to read data from the disk.
This Ecma Standard provides for interchange between optical disk
drives. Together with a standard for volume and file structure, it
provides for full data interchange between data processing
syste