HITACHI Deskstar & CinemaStar P7K500 Hard Disk Drive specification (Rev 1.1)
164
10.19.4
Command Error
Table 120
defines the format of the Command Error data structure.
Byte
7 6 5 4 3 2 1 0
0 NQ
Reserved TAG
1 Reserved
2 Status
3 Error
4 Sector
Number
5 Cylinder
Low
6 Cylinder
High
7 Dev/Head
8
Sector Number Previous
9 Cylinder
Low
Previous
10 Cylinder
High
Previous
11 Reserved
12 Sector
Count
13
Sector Count Previous
14 - 255
Reserved
256 – 510
Vendor Unique
511 Data
Structure
Checksum
Table 121
Command Error information
The TAG field (Byte 0 Bits 4-0) contains the tag number corresponding to a queued command if the NQ bit is
cleared.
The NQ field (Byte 0 Bit 7) indicates whether the error condition was a result of a non-queued or not. If it is
cleared the error information corresponds to a queued command specified by the tag number indicated in the
TAG field.
The bytes 1 to 13 correspond to the contents of Shadow Register Block when the error was reported.
The Data Structure Checksum (Byte 511) contains the 2’s complement of the sum of the first 511 bytes in the
data structure. The sum of all 512 bytes of the data structure will be zero when the checksum is correct.
Содержание 3.5-INCH Deskstar HDP725050GLAT80
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