Seek (7Xh) - IBM DTTA-351010 - Deskstar 10.1 GB Hard Drive Specifications

12.25 Seek (7xh)

C o m m a n d B l o c k O u t p u t R e g i s t e r s
R e g i s t e r
D a t a
F e a t u r e
S e c t o r C o u n t
S e c t o r N u m b e r
C y l i n d e r L o w
C y l i n d e r H i g h
D e v i c e / H e a d
C o m m a n d
E r r o r R e g i s t e r
7 6 5
C R C U N C 0 I D N
0 0 0
Figure 107. Seek Command (7xh)
The Seek command initiates a seek to the designated track and selects the designated head. The device need
not be formatted for a seek to execute properly.
Output Parameters To The Device
Sector Number In LBA mode, this register specifies LBA address bits 0 - 7 for seek. ( L = 1 )
Cylinder High/Low The cylinder number of the seek.
In LBA mode, this register specifies LBA address bits 8 - 15 (Low), 16 - 23 (High)
for seek. ( L = 1 )
H The head number of the seek.
In LBA mode, this register specifies LBA address bits 24 - 27 for seek. ( L = 1 )
Input Parameters From The Device
Sector Number In LBA mode, this register contains current LBA bits 0 - 7. ( L = 1 )
Cylinder High/Low In LBA mode, this register contains current LBA bits 8 - 15 (Low), 16 - 23 (High).
( L = 1 )
H In LBA mode, this register contains current LBA bits 24 - 27. ( L = 1 )
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
0 A B T T 0 N A M N
V 0 V 0 0
C o m m a n d B l o c k I n p u t R e g i s t e r s
R e g i s t e r 7 6 5 4 3 2 1 0
D a t a
E r r o r . . . S e e B e l o w . . .
S e c t o r C o u n t
S e c t o r N u m b e r V V V V V V V V
C y l i n d e r L o w V V V V V V V V
C y l i n d e r H i g h V V V V V V V V
D e v i c e / H e a d
S t a t u s . . . S e e B e l o w . . .
S t a t u s R e g i s t e r
7 6 5 4 3
B S Y R D Y D F D S C D R Q C O R I D X E R R
0 V 0 V
Command Descriptions
H H H H
2 1 0
0 V
139