Table 71: Command Data Structure - Hitachi HTS541010G9AT00 - Travelstar 100 GB Hard Drive Specifications

Command data structure: Data format of each command data structure is shown below.

Table 71: Command data structure

Description
Device Control register
Features register (7:0) (see Note)
Features register (15:8)
Sector count register (7:0)
Sector count register (15:8)
Sector number register (7:0)
Sector number register (15:8)
Cylinder Low register (7:0)
Cylinder Low register (15:8)
Cylinder High register (7:0)
Cylinder High register (15:8)
Device/Head register
Command register
Reserved
Timestamp (milliseconds from Power-on)
Note bits (7:0) refer to the most recently written contents of the register. Bits (15:8) refer to the contents of the reg-
ister prior to the most recent write to the register.
State shall contain a value indicating the state of the device when the command was issued to the device or the reset
occurred as described below.
Value State
Value
x0h
x1h
x2h
x3h
x4h
x5h-xAh
xBh-xFh
Note: The value of x is vendor specific.
State
Unknown
Sleep
Standby
Active/Idle
SMART Off-line
or Self-test
Reserved
Vendor specific
Travelstar 5K100 (Serial ATA) Hard Disk Drive Specification
110
Bytes Offset
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
18
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh