Figure 53. Defect Descriptor - Bytes From Index Format; Figure 54. Defect Descriptor - Physical Sector Format - IBM IC35L036UWDY10 - Ultrastar 36.7 GB Hard Drive Specifications

8.4.2.2 Bytes From Index format
Each defect descriptor for the Bytes From Index format specifies that the sector containing this byte be
marked defective. The defect descriptor is comprised of the cylinder number of the defect, the head
number of the defect, and the defect bytes from index.
Byte
7
0 (MSB)
1
2
3
4 (MSB)
5
6
7
8n -
8n +7

Figure 53. Defect descriptor - Bytes from Index format.

Format of the defect list sent during the DATA OUT phase when FmtData is set to one.
8.4.2.3 Physical Sector format
Each defect descriptor for the Physical Sector format specifies a defect that is the length of a sector. The
defect descriptor is comprised of the cylinder number of the defect, the head number of the defect, and the
defect sector number.
Byte
7 6
0 (MSB)
1
2
3
4 (MSB)
5
6
7
8n -
8n + 7

Figure 54. Defect descriptor - Physical Sector format.

Format of the defect list sent during the DATA OUT phase when FmtData set to one.
Bit
6 5 4
Cylinder Number of Defect
Head Number of Defect
Defect Bytes from Index
Defect Descriptor n
Bit
5 4
Cylinder Number of Defect
Head Number of Defect
Defect Sector Number
Defect Descriptor n
Ultrastar 146Z10 hard disk drive specifications
3 2 1
(LSB)
(LSB)
3 2 1
(LSB)
(LSB)
54
0
0