4.3 Format Commands

Physical sector address format defect descriptor

Table 4.39 lists this description format of the defect descriptor. A defect descriptor with this format specifies the physical sector number of the data block which includes the defect on the disk media together with the cylinder No. and the head (track) No. When specifying multiple defect descriptors, the cylinder No. must be specified in the top position and the physical sector No. in the bottom position, with the defect positions listed in ascending order.

Sector numbers described in this format are physical sector numbers which to not apply the "Track skew factor" and the "Cylinder skew factor."

Table 4.39 Defect descriptor: physical sector address 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

 

Physical sector No. of defective block

(MSB)

 

 

 

 

 

 

 

 

 

5

 

Physical sector No. of defective block

 

 

 

 

 

 

 

 

 

 

 

6

 

Physical sector No. of defective block

 

 

 

 

 

 

 

 

 

 

7

 

Physical sector No. of defective block

(LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C141-C013

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Fujitsu MBC2036RC, MBC2073RC, MBA3300RC, MBA3147RC, MBA3073RC Defect descriptor physical sector address format, Msb