Deskstar T7K250 Hard Disk Drive Specification
186
12.37 Seek (7xh)
Table 115: Seek command (7xh)
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 In LBA mode this register specifies the LBA address bits 0–7 for seek. (L = 1)
Cylinder High/Low This is the cylinder number of the seek. In LBA mode this register specifies the
LBA address bits 8–15 (Low) and bits 16–23 (High) for seek. (L = 1)
H This is the head number of the seek. In LBA mode this register specifies the LBA address
bits 24–27 for seek. (L = 1)
Input parameters from the device
Sector Number In LBA mode this register contains the current LBA bits 0–7. (L = 1)
Cylinder High/Low In LBA mode this register contains the current LBA bits 8–15 (Low) and bits16–23
(High). (L = 1)
H In LBA mode this register contains the current LBA bits 24–27. (L = 1)
Command Block Output Registers Command Block Input Registers
Register 7 6 5 4 3 2 1 0 Register 7 6 5 4 3 2 1 0
Data - - - - - - - - Data - - - - - - - -
Feature - - - - - - - - Error see below
Sector Count - - - - - - - - Sector Count - - - - - - - -
Sector Number V V V V V V V V Sector Number V V V V V V V V
Cylinder Low V V V V V V V V Cylinder Low V V V V V V V V
Cylinder High V V V V V V V V Cylinder High V V V V V V V V
Device/Head 1 L 1 D H H H H Device/Head - - - - H H H H
Command 0 1 1 1 - - - - Status see below
Error Register Status Register
7654321 0 7654 3 21 0
CRC UNC 0 IDN 0 ABT T0N AMN BSY RDY DF DSC DRQ COR IDX ERR
000V0V0 0 0V0V - 0- V
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