Datasheet

Command Specifications

4-160 C141-C008

The format of the “Defect Data” list transferred from the INIT by this command

is shown in Table 4.100.

Table 4.100 REASSIGN BLOCK command: defect data list configuration

Bit

Byte

7 6 5 4 3 2 1 0

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)

Defective Block Logical Block Address

n+3

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.

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.

The logical block address of defective data blocks is described in 4-byte format in

the defect descriptor. When multiple defect descriptors are specified, it is best for

the INIT to describe defect descriptors in the ascending order of the logical data

block addresses.

Header

Defect

Descriptor

List