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4-14 C156-E227-01EN
4.4.2 Defect sector management
Sector mapping is executed based on the ISO/IEC 10090 standard for 128 MB
media, the ISO/IEC 13963 standard for 230 MB media, the ISO/IEC 15041
standard for 540 and 640 MB media, and GIGAMO 1.3 GB 90 mm Magneto-
optical Disk System-System Description for 1.3 GB media. Basically, possibly
defective sector management is not required for the host.
Defective sectors cannot be deleted from the host, except for certifying recordable
areas. Recordable areas can be certified with the FORMAT UNIT command.
4.4.3 Automatic alternate sector assignment function
The ODD automatically assigns an alternate sector if a verify error is detected in
the ID or data section during the WRITE (I0) command, WRITE (12) command,
or WRITE AND VERIFY and ERASE command. Alternate sector information is
registered in SDL (Secondary Defect List) on media.
After automatic alternate assignment terminates successfully, the ODD does not
report any error.
For the criteria for executing alternate sector assignment processing, see Table
4.14, "Alternate sector assignment criteria."
Table 4.14 Alternate sector assignment criteria
Processing Alternate sector assignment
processing
Remarks
ID read error 128/230 MB media: 3 read errors in
3 sectors
540/640 MB or 1.3 GB media: 2
read errors in 2 sectors
-
Data error 5 or more bytes per interleave Verify Check is not performed unless it
is valid.
This criterion is inapplicable to the
ERASE command.