Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
223
18.23.4
Bytes from Index Format (100b)
Table 195 Defect Descriptors of Bytes from Index Format
Byte
Defect Descriptors
0-2
(MSB)
Cylinder Number of Defect
(LSB)
3
Head Number of Defect
4-7
(MSB)
Defect Bytes from Index
(LSB)
Defect Bytes from Index is gotten using the following equation:
Bytes from Index = (Physical Sector Number) * N
Where: N = Bytes per sector
18.23.5
Physical Sector Format (101b)
Table 196 Defect Descriptors of Physical Sector Format
Byte
Defect Descriptors
0-2
(MSB)
Cylinder Number of Defect
(LSB)
3
Head Number of Defect
4-7
(MSB)
Defective Sector Number
(LSB)
The Defect List Format field specifies the format of the defect list data returned by the Target.
The Defect List Length field specifies the length in bytes of the defect descriptors that follow. The Defect List Length
is equal to eight times the number of defect descriptors.
Normally the Target will set the Defect List Length field to the amount of space needed to contain the entire defect list.
However, the Target is capable of building a defect list with a length such that the entire list cannot be transferred
using the maximum allocation length. If the defect list grows beyond 8191 entries, the defect data cannot be
transferred with an allocation length of 0FFFFh. The Target will transfer a partial defect list and return Check
Condition status with the sense key set to Recovered Error and the additional sense code set to Partial Defect List
Transferred. The defect list length will be set to 0FFF8h, indicating the maximum number of defect descriptors that
can be transferred. Defects beyond this number cannot be read by the Initiator.