
Host Interface
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
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 | Remarks |
| processing |
|
|
|
|
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. |
|
|
|