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4-64 C156-E205-01EN
Table 4.93 Sector Address Format
Bit
Byte
76543210
0-2 00h
3 0 For disks other
than 2.3 GB: 00b
For 2.3-GB disks:
00b Groove
10b Land
Sector Address
4.6.13 READ DEFECT DATA (12) command
Table 4.94 READ DEFECT DATA (12) command
Bit
Byte
76543210
0 Operation Code (B7h)
1 Reserved Plist Glist Defect List Format
2-5 Reserved
6-9 Allocation Length
10-11 Reserved
The READ DEFECT DATA (12) command transfers the defect data to the host.
When Plist is 1, the command transfers header and PDL. When Glist is 1, the
command transfers header and SDL. When both Plist and Glist are 0, the
command transfers the header. When both Plist and Glist are 1, the command
transfers PDL and SDL. PDL and SDL are respectively arranged in an ascending
order.
The defect list format supported is listed in Table 4.95, Defect List Format -
READ DEFECT DATA (12). If any other format is specified, the command
assumes 101b and reports Recovered Error.
Table 4.95 Defect List Format - READ DEFECT DATA (12)
Defect List Format
Data format
101 Physical sector address format
The defect list header is listed in Table 4.96, Defect List Header - READ DEFECT
DATA (12). Table 4.92 shows the defect descriptor.