HP C2488A

<:
SCSI
INTERFACE
"
SCSI
~;
ELECTRONICS/
CHANNEL
CONTROLLER PCA
RAM
A
BUFFER
...
~;
.A
DISK DATA
-~
"
"
DATA
DISK
ENCODER!
CONTROLLER
A
"
DECODER
"
SECTOR i r INDEX
r----
----------------
HDA
..
MICRO- DATA HEAD
... ...
CONTROLLER
INTERFACE
1
DATA HEAD
DATA
r---
HEAD
HEADS
POSITION
ALIGNMENT
/'"'II
r----o
f----D
~
SERVO
f----D
ACTUATOR
~
PROCESSOR
MOTOR
ACTUATOR
i
"-
f----D
DRIVER
i
CONTROL
i
v
~
,-
~ ----
f----DSERVO
I
~
SERVO HEAD
I
f----D
I
POSITION
r--t::J
SERVO
I
~
SPEED
TIMING
I
r--t::J
INFORMA TION
I
~
I
'--
SPINDLE
I HALL EFFECT =:Jf
MOTOR
SPINDLE
J
SENSOR FEEDBACK
CONTROL
MOTOR
DRIVER
i
MOTOR CURRENT
w2Ddm304
Figure 3·3. Disk Drive Block Diagram
DRAFT
Product Features 3·15
1/18/93 09:58