3 defect management, 1 defect management schematic diagram – FUJITSU MCJ3230SS User Manual
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2.3 Defect Management
C156-E224-01EN
2-11
2.3 Defect Management
2.3.1 Defect management schematic diagram
Defective sectors on the disk shall be replaced by good sectors according to the
defect management scheme as follows: Defective sectors found during surface
certification are handled by a sector slipping algorithm. Defective sectors found
after initialization are handled by a linear replacement algorithm.
Figure 2.2 shows the algorithms for alternate processing.
(a) Sector slipping algorithm
(b) Linear replacement algorithm
Figure 2.2 Algorithms for alternate processing
The user area is divided into several groups during media initialization. Each
group contains data sectors and spare sectors. Spare sectors are used as
replacements for defective data sectors. Media initialization can include a
certification of the user area.
Figure 2.3 shows an example of alternate processing.