Seek (7Xh); Table 129: Seek Command (7Xh) - Hitachi HTS542525K9SA00 Specifications

12.36 Seek (7xh)

Table 130: Seek command (7xh)
Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0 IDN
0 0 0
The Seek command initiates a seek to the designated track and selects the designated head. The device does not
need to be formatted for a seek to execute properly.
Output parameters to the device
Sector Number
Cylinder High/Low This is the cylinder number of the seek. In LBA mode this register specifies the
H
Input parameters from the device
Sector Number
Cylinder High/Low In LBA mode this register contains the current LBA bits 8–15 (Low) and bits16–23
H
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
V V V V V V V V
V V V V V V V V
V V V V V V V V
1 L 1 D H H H H
0 1 1 1 - - - -
4 3 2 1
0 ABT T0N AMN
V 0 V 0
In LBA mode this register specifies the LBA address bits 0–7 for seek. (L = 1)
LBA address bits 8–15 (Low) and bits 16–23 (High) for seek. (L = 1)
This is the head number of the seek. In LBA mode this register specifies the LBA address
bits 24–27 for seek. (L = 1)
In LBA mode this register contains the current LBA bits 0–7. (L = 1)
(High). (L = 1)
In LBA mode this register contains the current LBA bits 24–27. (L = 1)
Deskstar 7K160 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
0 7 6 5
BSY RDY DF DSC DRQ
0 0 V 0
215
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
V V V V V V V V
V V V V V V V V
V V V V V V V V
- - - - H H H H
see below
Status Register
4 3 2 1
COR IDX
V - 0 -
0
ERR
V