Command Specifications

b.Defect list (D List)

The defect list (D List) contains defect position information about the disk media specified by the INIT and is configured from one or more "Defect descriptors." "Defect descriptors must be described in the format specified in the "Defect List Format" field of the CDB.

The configurations which it is possible to specify for the "Defect descriptors" in the defect list (D List), and their description formats, are shown below. Furthermore, it is possible only to specify User Space address information on the disk media in the Defect list (D List).

Byte distance from the index format defect descriptor

Table 4.38 lists this description format of the defect descriptor. Defect descriptor in this format specifies the cylinder number, head (track) number and byte distance to the top byte of those data (8 bytes), of the data which includes defective bits, on the disk media. One defect is treated as a defect with a length of 8 bytes (64 bits length). Therefore, for defects with a length which exceeds 8 bytes, 2 or more defect descriptors must be specified. When multiple defect descriptors are specified, the cylinder number must be specified in the top position, the byte distance from the index in the bottom position, and the defect positions listed in ascending order.

Table 4.38 Defect descriptor: byte distance from index format

 

Bit

7

 

6

5

 

4

 

3

 

2

1

0

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

Cylinder No. (MSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

Cylinder No.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

Cylinder No. (LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

Head No.

 

 

 

 

 

 

 

 

 

 

 

4

 

Byte distance from index to defect position (MSB)

 

 

 

 

 

 

 

 

5

 

Byte distance from index to defect position

 

 

 

 

 

 

 

 

 

6

 

Byte distance from index to defect position

 

 

 

 

 

 

 

 

 

7

 

Byte distance from index to defect position

(LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

230

C141-C013

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Fujitsu MBA3073RC, MBC2036RC, MBC2073RC, MBA3300RC, MBA3147RC Defect descriptor byte distance from index format, Lsb