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The READ DEFECT DATA command transfers media defect data to the host.
When Plist is 1, the command transfers header and PDL. When Glist is 1, this command transfers
header and SDL. When both Plist and Glist are 0, it transfers the header. When both Plist and
Glist are 1, the command transfers PDL and SDL. PDL and SDL are arranged in an ascending
order.
The defect list format supported is listed in Table 4.89. If any other format is specified, the
command assumes the format listed in Table 4.90 and reports Recovered Error.
Table 4.89 Defect list formats
Defect List Format Data format
101 Physical sector address format
Table 4.90 Defect descriptor
Byte Defect descriptor
0-2 Defect block track address
3 00h
4-7 Defect block sector address
The detect list header is shown in Table 4.91.
Table 4.91 Defect list header
Bit
Byte
76543210
0 00h
1000PlistGlist Defect List Format
2-3 Defect List length
4-n Defect Descriptor(s)