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C141-E124-01EN 3 - 99
The format of the “Defect Data” list transferred from the INIT by this command is shown in Figure
3.16.
Bit
Byte
76543210
0 X‘00’
1 X‘00’
2 Defect List Length (m) (MSB)
3 Defect List Length (m) (LSB)
4 Defective Block Logical Block Address (MSB)
5 Defective Block Logical Block Address
6 Defective Block Logical Block Address
7 Defective Block Logical Block Address (LSB)
8
Defective Block Logical Block Address
n+3
Figure 3.16 REASSIGN BLOCK command: defect data list configuration
The “Defect data” list is configured from a 4-byte header and one or more defect descriptors which
follow it. One defect descriptor has a length of 4 bytes.
The “Defect list length” field in the header indicates the total number of bytes (m) of the defect
descriptor list transferred after the header, and must be a multiple of 4. Also, when zero is
specified in this field, this command is terminated without transfer of the defect descriptor list and
allocation processing of alternate blocks.
Note:
The Defect list length that can be specified for the IDD is 2,044 (X ‘7FC’) bytes or less.
Therefore, a maximum of 511 defective blocks can be specified in the REASSIGN BLOCKS
command.
~
~
~
~
Header
Defect
Descriptor
List
~
~