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C141-E124-01EN3 - 102
3.3.3 READ DEFECT DATA (37)
Bit
Byte
76543210
0 X‘37’
1 LUN 00000
2 0 0 0 PList GList Defect List Format
300000000
400000000
500000000
600000000
7 Transfer Byte Length (MSB)
8 Transfer Byte Length (LSB)
9000000FlagLink
This command transfers the list described in the defect position information of the disk media
(defect data) to the INIT.
There are two types of defect data, the P List (primary defect list) and the G list (grown defect list). The
P List indicates the defect position information at the time the disk drive was shipped from the factory.
On the other hand, the G List shows the defect position information specified from the INIT by the
REASSIGN BLOCKS command or automatic alternate block allocation processing, or when executing
the FORMAT UNIT command, or defective data block positional information from alternate block
allocation from Verify operation after initialization.
The INIT can specify the defect data type transferred to the INIT by the “P List (primary list)” bit
and “G List (grown list)” bit in the CDB and can specify the defect data format by the “Defect List
Format” field.
PList GList Defect Data Type
1 1 P List and G List
10P List only
01G List only
0 0 4-byte header information only (described in this section)
Defect List Format Defect Data Format
0 0 0 Block Address Format
1 0 0 Byte Distance from the Index Format
1 0 1 Physical Sector Address Format