ounRlum
OEM
MANUAL
Q2000
8" Media Fixed Disk Drive
QUANTUM
CORPORATION
2150 Bering Drive
San Jose,
CA.
95131
(408)
262·1100
Publication
PIN
81·40184
PREFACE
This manual describes the
mechanical characteristics
electrical
of
the Q2000
and
Series Rigid Disk Drive required by
customers
device.
It
purchase
contains timing,
it
as
an.
electrical
OEM
and
who
mechanical specifications, and recommended
circuitry
host
controller
necessary
and
data
to
interface
separator.
it
to
a
TABLE OF CONTENTS
1.0
2.0
3.0
Introduction
1.1
1.2
1.2.1
1.2.2
1.2.3
1.2.4
Functional Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1
2.2
2.2.1
2.2.2
2.3
2.4
2.5
2.5.1
2.5.2
2.5.3
2.6
Functional Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1
3.2
3.3
3.4
3.5
3.6
..........
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specification Summary .
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Reliability Specifications
Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Functional Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General Qperatlons
Read/Write
Transducer
Main PCB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Drive Mechanism
Read/Write Heads
Head
Positioning System
Rotary Torque Motor Actuator
Optical Track Position Encoder
Temperature Compensation Servo. . . . . . . . . . . . . . . . . . . . . 6
Air Filtration System
Power Sequencing
Drive Selection
Track Accessing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Head
Selection. . . . . .
Read
Operation. . .
Write Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
'. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
..
. . . .
..
. . . .
..
. . .
..
.. .. . ..
............................
.................................
and
Control Electronics. . . . . . . . . . . . . . . . . . . . 5
PCB
...........
...................................
and
Disks
................................
..
. • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
.........•....................
..
.. . ..
. . . . . . . . • . . . . . . . . . . . . . . . . 5
.........................
............................
.................•......
.......................
. . . . . . . . . . . . . .
. . . . . . . . .
...
. . . . . . . . . . . .
..
. . . . . . . . . . . . . . . . . .
. . . 2
. . . . . . . 9
3
5
6
6
6
6
6
8
10
10
10
4.0
5.0
Interface Lines
Signal Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1
5.1.1
5.1.2
5.1.3
5.1.3.1
5.1.3.2
5.1.4
5.1.5
5.1.6
5.1.7
5.2
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.3
5.3.1
5.3.3
5.4
Control Input
Drive Select 1 through 4 . . .
Direction
Step..
Normal Step
Buffered Step
Head
Write Gate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reduced Write Current. . . . . .
Rezero..
Output
Track
Index.
Ready
Write Fault.
Seek
Data Transfer Lines
MFM
Timing Clock. . . . . . . • . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . .
Select Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
and
Pin
Assignments. . . . . . . . . . . . . . . . . . . . . . . . . .
Lines..
In
.........
. . . . .
..
Mode
Mode.................................
Select
000
Complete
Write
2°,
2
. .
..
. .
Lines.
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.... . .. . ....
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. . ... ...
Date....................................
. . . . . . . . . . . . . . . .
..
. . .
..
. . . . .
..
. . . . . . . .
. . .
..
. . . .
..
. . . .
...
...
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
and
22
,
.. . ..
....
. . . . . . .
. . . . . . .
...
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..............
..
.. . ..
.. . ..
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
...
.. ..
. • . . .
. .
..
. . . . . . . . .
..
. . . . .
..
. .
...
. . . . . . .
. . . .
...
...
. . . . . . . . . .
..
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
....
. . .
..
. . . .
. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
..
..
..
. . . . . . .
...
. . . . .
. . . . .
..
..
. . .
.. . 18
. . .
. .
11
11
11
11
12
12
12
12
12
18
18
18
19
19
19
19
19
20'
20
20
20
II
6.0 General Timing Requirements
..........•....................
23
7.0 Power Interface. . . . . . .
7.1
7.2
AC
Power
DC
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.0 Physical Outline . . . . . .
..
. . . . . . . . . . . . . . . . .
.................
..
..
. . . . . . . . . . . . . . . . . . .
..
. . . . . . . . . .
~........................
..
. . . . . . . . . . . .
..
. . . .
9.0 Physical Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.0
11.0
9.1
9.2
9.3
9.4
Q2000
10.1
10.1.1
10.1.1
10.1.3
10.1.4
10.2
Installation Instruction
11.1
11.2
11.3
11.4
11.5
11.5.1
11.5.2
11.6
J1/P1 Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J2/P2 Connector. . . . . . . . . . . . . . . . . . . . . . . . .
.. . ..
. . . . . .
J5/P5 Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J4/P4 Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Track
Format.
. . .
..
. . .
...
..
. . . . . . . . . . . .
Gap Length Calculations. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gap 1
.............................................
Gap2.............................................
G·ap 3 .............................................
Gap 4
..............................•..............
Write Precompensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.....................................
Required
Unpacking
Tools..
. . . . . . . . . . . . . . . . . . .
Instructions.
. . . . . . .
..
. . . .
..
. . . . . . . . . . . . . .
...
. . . . . . . . . . . . .
Motor Locking Clip Disengagement. . . . . . . . . . . . . . . . . . . .
Actuator Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drive Options
Jumper Options (Main
......................................
PCB)
..........................
Cut Trace Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Line Termination. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25
25
26
27
27
29
29
29
29
31
31
32
32
32
32
32
35
35
35
35
35
36
36
36
36
12.0 Shipping Instructions
12.1
12.1
12.3
Actuator
Motor Locking Clip Engagement. . . . . . . . . . . . . . . . . . . .
Packaging
Appendix A - Definition
........ ~ . . . . . . .
Lock.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
................
of
Terms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..
. . . . . . . . . .
..
. .
..
' . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . .
Appendix B - Media Defects and Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix C - Ordering Information
iii
................................
..
36
36
.36
~6
39
43
45
Figure
LIST OF ILLUSTRATIONS
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
Q2000 Series Rigid Disk Drive
Servo Information Location
Head Positioning Mechanism
Air Filtration System
Typical Multiple Drive Connection
Normal
Buffered
Control Signal Driver/Receiver Combination
Index Timing
Data Transfer Line Driver/Receiver
MFM Write Data Timing
MFM Read Data Timing
General Control Timing Reqirements
Q2000 Mounting Dimensions
Mechanical Dimensions and Connector Location
J1
J2 Connector Dimensions
J5 Connector
J4 Connector
Track Format
Motor
Actuator
PCB Jumper Locations
Typical Quantum Disk Drive Organization and Terminology
Data Area and Landing
Step Mode Timing
Step Mode Timing
.............................................
Connector Dimensions
............................................
............................................
............................................
Locking Clip Location
Lock
............................................
......................................
....................................
Zone
..............................
................................
..............................
..........................
.................................
................................
..................
..........................
...................................
...................................
........................
...............................
.............
.................................
.................................
...............................
...............................
.....
.
v
.
6
.
7
.
8
.
13
13
.
.
15
.
18
.
19
.
20
.
20
.
21
.
23
.
27
.
28
.
29
.
29
.
29
.
29
.
32
.
35
.
35
.
37
.
41
.
41
fA
IB
"
III
IV
V
VI
VII
VIII
IX
X
XI
LIST OF TABLES
JlIP1
J2/P2 Connector Pin Assignment
P5·DC Connector Pin Assignment
P4·AC Connector Pin Assignment
Interface and Power Connections
J2
Head Select Decode
AC Power Requirements
DC
Write Precompensation
Product Selection
Voltage and Frequency Conversion Information
Connector Pin Assignment
Interface Connection
Power Requirements
Index
...................................
......................................
...................................
...................................
...................................
.................................•..
...........................
...........................
...........................
...........................
...........................
...............
.
14
.
14
.
15
.
15
.
16
.
17
.
18
.
25
.
26
.
33
45
.
45
iv
Quantum's
Shugart
new
Q2000
Associates
8-inch
SA1000.
fixed
disk
drive
compatible
with
industry
standard
Figure
1.
v
Q2000 Series Rigid Disk Drive
1.0 INTRODUCTION
1.1
General
The
Quantum
random access storage device
three, or
as
storage media. Each disk surface employs
one movable head
tracks. The
are
Q2010, Q2020. Q2030, and Q2040
one, two, three, or
tively. The
of
storage accessed by 2 movable heads.
The
Q2020 had 21.33 megabyte capacity,
the
Q2030
the
Q2040
4,
6 and 8 movable heads respectively. Low
cost and drive
through the
tuator
mechanical construction and electronic control
maintenance throughout the
drive.
design. The inherent
allows operation
Description
Series 2000 Disk Drive
with
four
non-removable
to
access the
four
models
four
Q2010 provides 10.66 megabytes
has
32.00 megabyte capacity and
has
42.67 megabyte capacity
reliability
use
of
a unique positioning ac-
with
8"
of
the Q2000 series
disk platters respec-
are achieved
simplicity
minimal
life
is
one, two,
rigid disks
512
data
with
of
of
the
a
with
Mechanical and contamination
for
the heads, actuator, and disks
ed by
an
impact
aluminum enclosure. A self-contained recirculation system supplies clean air through a
0.3 micron
allowing pressure equalization
air
without
Q2000
The
with
an
actuator
shipping protection. In addition, the heads
are positioned in a landing and shipping
zone on the disk surfaces which
track
511.
The heads are always positioned
in this zone when power
the heads never rest upon any area
disk surface where data
power up, the heads
area
until
the disk
for
the heads
An external data separator
provide
precompensation, a crystal
oscillator, and address mark
detecting. Quantum's
may
trollers, however, integrate these functions
into the
disk drive interface
MFM
be
used
controller
resistant plastic and
filter
with
another absolute
contamination.
Series
Disk Drive
lock and a spindle
is
do
not
is
rotating fast enough
to
fly.
encoding/decoding, write
Q2200 data separator.
for
these fUnctions.
design. The Q2000 fixed
is
similar
protection
is
with
ambient
is
also supplied
lock
is
inside
is
removed
of
written. Upon
move
from
is
required
controlled
writing
to
and
Most
the Shugart
provid-
filter
for
so
that
the
this
to
write
con-
1
8"
floppy
SA1000 series disk drive interface. The
Q2000 series disk
same
requirements
Key Features:
drive and a superset
drive
form
factor
and power supply voltage
as
8"
floppy
is
designed
drives.
of
Shugart's
with
the
Depth
Weight = 17 Ibs.
HEAT DISSIPATION
=
= 14.25 in.
235
BTU/HR.
(362.0mm)
(7.7Kg)
TYP
(70 Watts)
Storage Capacity
•
megabytes
Winchester design
•
Same physical size and mounting
•
8"
floppy
Uses
•
8"
floppy
0
Proprietary, rotary, high resolution,
quiet, head-position actuator
4.34M bits/second transfer rate
•
Shugart SA1000 interface compatible
•
Microprocessor controlled temperature
•
compensation servo
1.2
SPECIFICATION SUMMARY
1.2.1
Physical Specifications
ENVIRONMENTAL LIMITS
Ambient
= 50°
Relative
=
8%
Maximum
drives
the same
and SA1000 drives
temperature
to
115°F (10°
Humidity
to
80%
wet
of
D.C.
bulb
10,
20,
reliability
voltages
to
46°C)
= 78° non-condensing
30,
as
or
40
as
AC
POWER REQUIREMENTS
SO/60Hz
100/115VAC Installations =
90-127V
200/230VAC Installations =
180-253V
DC
VOLTAGE REQUIREMENTS
+24VDC±10%
+
-5VDC±5%
optional)
MECHANICAL DIMENSIONS
Height = 4.50 in.
Width
±0.5Hz
at
1.0A Typical
at
O.5A
Typical
1.25A Typical
5VDC ± 5% 1.01 Typical
(-7
to
O.2A
Typical
(114.3mm)
= 8.55 in.
(217.2mm)
2
-16VDC
1.2.2 Reliability Specification
MTBF: 8,000 POH typical usage
PM:
not
required
MTTR:
Component
Error
Soft read errors: 1 per 10
Hard read errors: 1 pet
Seek
30
minutes
life:
5 years
Rates
10
12
10
errors: 1 per 106 seeks
bits read
bits read
1.2.3 Performance specifications
Q2010
Capacity
Unformated
Per
drive
Per
surface
Per
track
Formatted (MFM)
Per
drive
Per
surface
Per
track
Per
sector
Sectors/TK
Transfer Rate
Access Time
TK
to
TK
Average
Maximum
Avg. Latency
10.66Mb
5.33Mb
10.40Kb
8.4OMb
4.20Mb
8.20Kb
256
Bytes
32
4.34Mbits/sec
15
ms
50
ms
100
ms
10
ms
1.2.3 Functional Specifications
Rotational speed
Recording Density
Flux Density
Track Density
Cylinders
Tracks 1024
R/W Heads
Disks
Index
3000
6600
6600
345
512
1
1
RPM
bpi
fci
tpi
2
Q2020
21.33Mb
5.33Mb
10.4OKb
16.80Mb
4.20Mb
8.20Kb
256
Bytes
32
4.34Mbits/sec
ms
15
55
ms
100
ms
10
ms
3000
RPM
6600 bpi
6600
fci
345
tpi
512
2048
4
2
1
Q2030
32.00Mb
5.33Mb
10.40Kb
25.20Mb
4.20Mb
8.20Kb
256
Bytes
32
4.34Mbits/sec
15
ms
60
ms
100
ms
10
ms
3000
RPM
6600 bpi
6600 fci
345
tpi
512
3072
6
3
1
Q2040
42.66Mb
5.33Mb
10.4OMb
33.60Mb
4.20Mb
8.20Mb
256 Bytes
32
4.34Mbits/sec
15
ms
65
ms
100
ms
10
ms
3000
RPM
6600 bpi
6600 fci
345
tpi
512
4096
8
4
1
and higher disk capacity
Shugart Associates
mat and interface compatibility.
Rotational speed, recording, flux and track
differ
from
densities
comodate Quantum track position servo
SA1000
SA1000
values
while retaining
and
to
SA1400
ac-
for-
3
2.0
FUNCTIONAL CHARACTERISTICS
2.1
General Operation
The
Series
2000 fixed disk drive consists
read/write and
write
heads, head positioning mechanism,
media, and air
components perform the
tions:
• Interpret and generate control signals
• Position the heads over the selected
track
compensate
track location
•
Read
• Provide a contamination free environ-
ment around the media
• Perform diagnostics on the head posi-
tioning and servo systems
2.2
Read/Write
control
filteration
with
appropriate corrections
and
write
electronics, read/
system. These
following
for
thermal effects on
data
And
Control Electronics
of
func-
to
The electronics
on
two
printed
PCB
and the Transducer
2.2.1
The Transducer
circuits:
• Coarse servo transducer detector
•
• AGC
• Head select diode matrix
Transducer
circuit
Raw
sensors
2.2.2 Control
The main
circuits:
• Index
• Head positioning
• Microprocessor
servo control
for
the drive are packaged
circuit
boards, the control
PCB
PCB
contains the
track 0 detector
circuit
for
servo and track 0
PCB
PCB
contains the
detector
circuit
for
as
well
actuator
PCB.
following
circuit
following
predrivers
diagnostics and fine
as
step buffers.
• Read/write amplifier/drivers
• Head select circuits
• Drive select
circuit
5
Drive ready
•
•
Write
• Power on reset
• Track 0
2.3
Drive
The spindle rotates at 3000 rpm through a
belt
drive
from
60Hz power
the
motor
operation can be
change.
2.4
The recording media
magnetic oxide coated on
diameter aluminum substrate. This
lubricated coating formulation, together
with
chester type
contact
2.5
The head positioning system consists
three
actuator,
temperature compensation servo.
2.5.1
drive
Read/Write
the
low
start/stop operation.
Head
major
optical
Rotary
Actuator
circuit
fault
detection
indicator
circuit
circuit
circuit
Mechanism
an
AC
motor. Either
is
accomodated
pulley and belt. 220/230VAC
utilized
Head
is
load force/low
flying
heads
Positioning
elements: rotary torque
track position encoder, and
Torque
by
changing
by a
motor
And
Disks
a lubricated
an
8 inch
mass
permit
reliable
System
Motor
(Fig. 3)
50
thin
Win-
motor
or
of
2.5.2
The
ven technology
photo
photodiode sensors. The encoder components are located inside the bubble
the scale attached
tuator
ten times the track density
product.
2.5.3
The temperature compensation, (fine) servo
obtains position feedback
disk surface
track location coding
the last inter-record gap and the index pulse.
This information
troller
the drive during this servo operation.
patibility
reducing the disk rotational speed by
This servo method places no restrictions on
format
to
Optical
optical
etched scale,
arm. This system
Track
track
position encoder
utilizing
Temperature
50
times each second. This
is
or host since
is
maintained
and allows
other comparable
platter
Position
a highly reliable
an
LED
to
the lowermost ac-
is
Encoder
light
accurate
utilized
Compensation
directly
is
embedded between
transparent
writing
with
competitive
to
is
inhibited by
like drives
capacities equal
is
a pro-
source and
with
to
over
in this
Servo
from
the
the con-
Com-
by
4%.
units.
SERVO
INFORMATION
The read/white heads are mounted on
counterbalanced arms attached
of
the roatry
tion
applies a pure torque
balance system maximizes bearing
leads
to
imum vibration resistance.
motor
The
sisting
pieces, a single plane moving coil and
bearings. This system
motors and its performance matches many
voice
coil
torque
high mechanical
is
of
simple construction con-
of
a ring magnet,
actuator
systems.
motor. This configura-
two
is
faster than stepper
to
to
the rotor. The
stability
flat
plate pole
and max-
the hub
life
and
two
PHYSICAL
INDEX
Figure
2.
Servo Information Location
INDEX TO
INTERFACE
6
OPTICAL
TRANSDUCER
TRANSDUCER
PCB
ACTUATOR
ARM
ROTOR
(2
COIL
PHASE)
HEAD
COUNTERBALANCE
Figure
CRASH
STOP
3.
Head Positioning Mechanism
TOP
PIECE
POLE
BonOM
PIECE
POLE
7
2.8
Air
Filtration System
(Fig.
4)
The disk(s) and read/write heads are
enclosed in a
and a
plastic bubble. The
integral recirculatory air system
solute (0.3
environment. A separate
mounted in the bubble
pressure area in the system
pressure equalization
without
module
micron)
contamination.
filter
with
consisting
module
with
to
maintain a clean
absolute
at
the lowest
to
allow
the ambient air
of
filter
fully
a casting
uses
an
an ab-
is
BREATHER
FILTER
Figure
4.
8
RECIRCULATION
FILTER
Air Filtration System
3.0 FUNCTIONAL OPERATIONS
3.1
Power Sequencing
No power sequencing
Q2000
is
normal rotational speed. Upon attaining
90%
will
and
quence. The recalibrate sequence
1.
2.
3.
series
drive. Upon power up, seeking
inhibited until the disk
of
the normal
be presented
the drive
Seek
Seek
Determine the offset value and store
in memory.
will
to
track
to
track 508.
is
necessary
is
at
speed
to
initiate a recalibrate
the
the controller interface
with
90%
of
READY
is:
O.
the
its
signal
se-
4. Repeat steps 2 and 3 for tracks 509,
510, and 511.
5.
Seek
to
track 448.
6. . Determine the difference between the
offset required and the offset determined
difference value in memory.
7.
Repeat steps 5 and 6
320,256,192,128,64,
for
track 508. Store this
for
tracks 384,
and
O.
it
This procedure
each with its own thermal compensation
value.
These
revolution
time
tracking and adjustment
drift. The initial recalibrate sequence takes
approximately
"SEEK
this time.
COMPLETE"
has
established eight zones,
values will
of
the disk thereby providing real
3 seconds
be
updated with each
for
to
complete and
will
be
false during
thermal
3.2 Drive Selection
Drive selection occurs when one
drive select lines
appropriately jumpered
put
signals and gate
controller.
3.3 Track Acce
Read/write head positioning
by:
a)
Deactivating write gate
b)
Activating the appropriate drive select
line
is
activated.
output
••
lng
will
of
the 4
Only
the drive
respond
signals
is
to
to
accomplished
in-
the
9
c)
Assuring
seek
ready and seek
d)
Select the appropriate direction
e)
Pulse the step line
that
complete
the
drive
is
true by checking the
complete
is
ready and
lines
Stepping can
buffered modes. In the normal stepping
mode, the heads are repositioned
of
the incoming step pulses. In the buffered
mode, incoming step pulses are
step
ed
in the microprocessor. When all
steps have been
a ramped stepping rate
motor.
Each pulse
one track position in
level
the
level on this line
ward
while
ward toward
3.4
Head Selection
Any
of
by
placing
address on the
occur
in
either
the normal
at
the rate
buffer-
of
received,
will
cause the heads
of
the
direction
will
a false level
track
o.
the 8 possible heads may be selected
that
head's appropriate binary
they
are issued
to
the actuator
or
out
depending on
in line. A true
cause steps
will
cause steps
to
to
move
be in-
3 head select lines.
3.5 Read Operation
Reading data
accomplished by:
from
the
Q2000
drive
is
or
the
at
out-
a)
Deactivating the
b)
Activating
line
c)
Assuring
checking the ready
d)
Selecting the appropriate head
that
write
the appropriate drive select
the drive
3.6 Write Operation
Writing
by:
a)
b)
c)
d)
e)
data
onto
the disk
Activating
line
Assuring
checking the ready line.
Clearing any
they exist
Selecting the appropriate head
Activating
MFM
the appropriate drive select
that
the drive
Write
by
reselecting the drive
Write
Gate and placing
data
on the
Write
gate signal
is
ready by
line
is
accomplished
is
ready by
Fault conditions
Data line
if
10
4.0
INTERFACE LINES AND
ASSIGNMENTS
PIN
The interface
three categories: Signal,
power. Tables
assignments
IV
and V show the recommended cable
types and the grounding configurations
the drive and
pins marked
signal pins marked
as
alternate
having a
4-drive subsystem
5.0
SIGNAL INTERFACE
The signal interface consists
categories: Control, and data transfer.
control
provide signals
vide signals
connector
are
differential
and clocking, either
the
J2/P2 Connector.
of
the drive
I,
II and
for
these interface lines. Tables
at
the host systems. Signal
SPARE
NA
I/O
signal pins
floppy
lines are TTL in nature and either
disk interface
is
to
the drive (input)
to
the host (output) via interface
J1/P1. The
in nature. They provide
is
divided
DC
power, and
III
define the pin
are
uncommitted.
should
shown in Figure
data
to
or
not
if a controller
is
used. A
of
two
transfer signals
from
the drive, via
into
be used
5.
or
pro-
AC
at
Those
All
data
5.1
Control Input Lines
The
control
Those intended
ple drive system and those intended
the multiplexing. The
to
be multiplexed are
HEAD
REDUCED
The signal which
multiplexing
SELECT
SELECT
The
input
specifications. Refer
recommended circuit.
Logic
Logic
5.1.1
DRIVE
the drive
DRIVE
and
will
signals and gate outputs.
input
signals are
to
be multiplexed in a
control
STEP,
SELECT
2,
4.
"0"
"1"
Drive
SELECT
SELECT
2°,
21
and
WRITE CURRENT, and REZERO.
is
intended
is
DRIVE
DRIVE
lines have the
= True =
SE
SELECT
to
O.OV
@
= False = 2.5V
@
Select 1 thru4
when true
to
the
control
line may be active
allow
the
drive
of
input
DIRECTION,
22,
WRITE GATE,
to
LECT
1, DRIVE
3,
or
following
figure 6
DC
to
lin = 40
DC
to
lin
= 0
logically
lines.
Only
to
respond
two
do
DRIVE
for
0.04V
MA
5.25V
MA
types:
multi-
to
do
signals
the
electrical
the
DC
(max)
DC
(Open)
connects
one
at a time
to
input
11
5.1.2 Direction In
This signal defines
the R/W heads when the
An open
direction
to
away
Conversely,
or
tion
pulse
heads
disk. A
line termination.
circuit
as
"out"
the
STEP
from
the center
if
a logical zero level
of
motion
is
applied
wi"
move toward the center
220/330 ohm resistor pack allows
direction
or
logical one defines the
and
line the R/W heads
this
input
is
defined
to
the
of
STEP
if
a pulse
of
the disk.
is
shorted
is
applied, the direc-
as
"in"
STEP
line, the R/W
motion
line
is
is
applied
wi"
move
to
and
of
of
pulsed.
ground
if
a
the
5.1.3 Step
This interface line
causes the R/W head
direction
TION
The access
logical zero
trailing
change in the
made
edge
There are
ping the R/W heads, the normal mode and
the buffered mode.
of
IN line.
motion
edge
at
least 100ms before the leading
of
the step pulse.
two
is
a control signal
to
move
motion
to
of
defined by the DIREC-
is
initiated
logical one transition on the
this signal pulse. Any
DIRECTION IN line must be
modes
of
operaion
with
at
each
the
of
which
step-
100ns
after
the last step pulse
to
the drive, the DRIVE SElECT line many
be dropped and a
minimum
The
with
a pulse
maximum
Refer
Timing.
Note: 1. Step pulses
time
to
Figure 6
200us and 1.0
Seek
if
2.
A 220/330 ohm resistor pack
allows step line termination.
5.1.4 Head Select
These three lines provide
of
each
individual
binary coded sequence. HEAD SElECT
the least significant line. Heads are
numbered
lines are false, head
TAble
and model variations
lines.
tions.
220/230 ohm resistor pack allows
A
mination on each line.
0 thru
VI shows the HEAD SElECT decode
See
Figure
different
time
between steps
witdth
this restriction
of
3.0us minimum. The
between steps
for
Buffered Step
with
accuracy
2°,
read/write heads in a
7.
When
0
wi"
for
11
for
timing
has
been sent
drive
selected.
is
3.0us
is
200us.
Mode
periods between
ms
are
not
allowed.
is
not
guaranteed
is
violated.
2\ & 22
for
the selection
a"
HEAD SElECT
be selected.
the HEAD ,SElECT
considera-
for
2°
ter-
is
5.1.3.1 Normal Step Mode
I n this mode
wi"
move
pulses. The
cessive steps
width
is
mode timing.
at
the rate
minimum
3.0us.
of
operation the R/W heads
of
the incoming step
time
between suc-
is
1.0ms. The
See
Figure 6
minimum
for
normal step
pulse
5.1.3.2 Buffered Step Mode
In this mode
are received
a counter.
heads
wi"
propriate number
Complete
after the
This mode
selected when the time between step pulses
is
< 200 usec.
of
operation the step pulses
at
a high rate and buffered
After
the last pulse the R/W
then begin stepping the ap-
of
cylinders and
(see
section 4.2.5)
R/W
heads settle at the cylinder.
of
operation
will
go true
is
automatically
into
Seek
12
CONTROLLER
--
~
J
}---{
-------
CONTROL CABLE
DATA
SEPARATOR
------,
,
I
,
I
I
I
I
I
DATA
TRANSFER
n
~
h
....
I
I
I
I
I
I
I
I
/'
P1/J1'
/'-
P2/J2
P1/J1'
>r:
P2/J2
9 P5/J5
I CABLES
Q P5/J5
1
DRIVE
P4/J4
DRIVE
P4/J4
#1
.J
#2
]--
______________
DC
VOLTAGES
(RADIAL)
AC
SUPPLY
• TERMINATION NETWORK REMOVED
Figure
5.
Typical Multiple Drive Connection
~
I
I
~
I
J
~
J
>r
"r
P1/J1'
P2/J2
Q P5/J5
I
P1/J1
P2/J2
Q P5/J5
T
DRIVE
P4/J4
DRIVE
P4/J4
#3
~
#4
P-
·DIRECTION
·STEP
.SEEK COMPLETE
--t
1100ns
~
I
l
----nU
--i
-------..11
Figure
MIN.
I-
3.01's MIN. I
__________________ ,
I---
,...
I-
8.
Normal Step Mode Timing
500ns
1.5ms MIN.
TYP
---t
U-
__
~(r
) ,1-----.----
f1jI..-
__
_
13
Table IA. J1/P1 Connector Pin Assignment
Ground Return
1
3
5
7
9
11
13
15
17
19
21
23
2,j
27
29
31
33
35
37
39
41
43
45
47
49
Signal
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
Pin
Signal Name
- Reduced Write Current
- Head Select
22
- Rezero (Jumperable
- Seek Complete
-NA
-NA
- Head Select
-NA
- Head Select
2°
21
-Index
-Ready
-NA
- Drive Select 1
- Drive Select 2
- Drive Select 3
- Drive Select 4
- Direction
In
-Step
-NA
-Write
-Track
Gate
000
- Write Fault
-NA
-NA
-NA
Option)
Table lB. J2/P2 Connector Pin Assignment
Ground Return
Signal
Pin
2 1
4 3
6
5
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Signal Name
- Drive Selected
Spare
Spare
Spare
GND
+Timing
-Timing
Clk
Clk
GND
GND
MFM
MFM
Write Data
Write Data
+
GND
GND
+MFM
-MFM
Read Data
Read Data
GND
GND
14
-STEP
-SEEK
-DRIVE
COMPLETE
SELECT
Pin
Pin 2
Pin
X
1
5
--II--
--------'
__________________________
Figure
VOLTAGE
+24
Volts
-7
to
(-5
OPT)
+5
Volts
-16
500ns
TYP
7.
Buffered Step Mode Timing
DC
Volts
Pin
2
Pin 3
Pin
6
(
"
~
I--
,OOn'
~~N
~I
GROUND
+
-7
( - 5
+ 5
)J~---I--------
24
Volt Return
to
-16
OPT)
Volt Return
Volt Return
1
1
____
___
_
--
Tabla
Tabla III.
II.
Pin
Pin
Pin
P5 -DC
1
2
3 Motor Power
P4 -AC
Connector
Motor Power
Frame Ground
Connector
Pin
Assignments
Pin
Assignments
"A"
"B"
15
HOST
FLAT RIBBON
OR
TWISTED PAIR
20 FT MAX
TWISTED
PAIR
LOGIC
GROUND
FRAME GROUND
DISK
CONTROLL~R
_L..-
~
-
-=-
- REDUCED WRITE CURRENT
- HEAD SELECT
- DRIVE REZERO
- SEEK COMPLETE
NA
NA
- HEAD SELECT
NA
- HEAD SELECT 2'
-INDEX
-READY
NA
- DRIVE SELECT 1
- DRIVE SELECT 2
-
DRIVE SELECT 3
- DRIVE SELECT 4
- DIRECTION IN
-STEP
NA
-WRITE
- TRACK 000
-WRITE
NA
NA
NA
+5V
DC
-
7V
TO -16V
I 24V
DC
ACINPUT
FRAME GROUND
AC INPUT
GATE
FAULT
2'
2'
(
5V
OPTI
--..
DRIVE
1
/
2
4
3
J1/P1
5
7
6
9
8
10
11
12
14
15
17
16
19
18
20
21
23
22
25
24
26
27
29
28
31
30
33
32
35
34
37
36
39
38
~
40
41
43
42
45
44
47
46
49
48
50
LOGIC GROUND
6
5
3
4
1
1
2
3
AC
2
MOTOR GROUND
~
::-
~51
.;....
-::-
SINGLE
WIRE
STRAP
J4/P4
P5
16
TABLE
IV.
Interface and Power
Connections
CONTROllER
DATA SEPARATOR
OR
DRIVE
FLAT CABLE
OR TWISTED
PAIR
FT MAX
20
-=-=
-
- DRIVE SELECTED
GND
SPARE
GND
SPARE
GND
+TlMING
-TIMING
GND
GND
+MFM
- MFM WRITE DATA
GND
+ MFM READ DATA
"
- MFM READ DATA
GND
GND
TABLE
ClK
ClK
WRITE DATA
V.
1
3
5
7
9
10
13
--.
14
17
18
J2 Interface Connection
2
4
6
8
11
12
15
16
19
20
-:..::-
":"
J2/P2
17
Head
22
Select
21
line
2°
Head
Selected
Q2010 Q2020 Q2030 Q2040
0 0
0 0
Write
from
1
1
0 0
0
1
Gate
of
write
the drive and enables the
to
reposition the head arms. A
0
0
1
1
1 1
1
5.1.5
The active state
enables
zero,
disk. The inactive state
logical one level, enables data
transferred
STEP
pulses
220/330 resistor pack allows
on each line.
0 0
1
0 2 2 2
1 3 3 3
1
0 6
1
Table
this signal,
data
to
be written on the
of
this signal,
for
1
VI.
Head
or
logical
or
to
be
termination
0
1 1 1
Select
0
4 4
5 5
Decode
5.2
Output
The control
an open
sinking a maximum
or
measured at the driver. When the line driver
is
transistor
rent
collector
true state
in logical one
is
is
a maximum
0
7
Lines
output
with
off
signals are driven
output
of
40 ina
maximum voltage
or
false state the
and the
of
250 microamperes.
stage capable
at
logical zero
driver
collector
cutoff
with
of
of
0.4V
cur-
5.1.6
When this interface signal
lower
writing.
value
writing
higher value be selected when writing on
tracks 0 through 255. When this signal
high (false), the higher value
rent
resistor pack allows
5.1.7 Rezero (PCB
When this interface signal
microseconds minimum, the drive
internal
recalibrate
enabled by adding a
tion near connector
220/330 ohm resistor pack allows
termination.
Reduced
value
It
is
of
write
on tracks 256 through
is
selected
microcomputer
Write
of
Write
Current
recommended
current be selected when
for
writing. A 220/330 ohm
for
Option)
to
cylinder
jumper
J1
Current
is
low
(true) the
is
selected
that
the lower
511
and the
of
Write Cur-
line termination.
is
low
(true)
will
parameters and
o.
This feature can be
at the
"C"
on the
PCB.
for
A
line
is
50
reset
for
will
op-
All
J1
output
respective DRIVE SElECT LINE.
Figue 8 shows the recommended control
signal driver/receiver combination.
Figure
lines are enabled by
20ft (MAX)
8.
Control
Combination
Signal
the
3300
Driver/Receiver
18
5.2.1
This interface signal indicates a true state
only
at
This
state, when the selected drive's R/W head
not
5.2.2
The index
each revolution
ning
one level
logical
10us
this
quirements including track format initialization.
The
edge
during each disk rotation. During the last
microseconds before each index
and
host (this time
for the thermal compensation
5.2.3
This interface signal, when true together
with
drive
that
this
seeking are inhibited at the drive, and the
R/W heads are
the landing zone (innermost disk radius).
Track
when drive's
track zero (the outermost data track).
signal
at
track zero.
000
R/W
heads are positioned
is
a logical one level,
or
false
Index
signal
is
provided by the drive once
(20.0ms)
of
a track. Normally, this
and
makes
zero level for a period
once each revolution.
pulse must
19.2 milliseconds following the leading
of
index
write functions
be
are
is
used
to
indicate the
signal
the transition to the
of
approximately
The
leading edge of
used
for all timing
available for
are
not available to the
by internal drive logic
read
pulse,
servo
begin
is
a logical
re-
and
write
read
function).
Ready
SEEK
COMPLETE, indicates
is
ready
to
read, write, or seek and
the interface signals are valid. When
line
is
false, all reading, writing, and
automatically
that
the
positioned at
800
is
5.2.4
This signal
used
the drive
the disk. When this line goes true,
writing
condition
DRIVE
made inactive
fault
condition
WRITE CURRENT in the head
WRITE GATE active.
5.2.5
This line
have settled on the final track
a
tempted when
SEEK
(1)
(2)
Write
to
SELECT
detection circuit. There
Seek
seek.
Reading
COMPLETE
A recal ibration sequence
(by
500
step
step pulses.)
SEEK
SELECT.
Fault
is
provided by the drive and
indicate
that
is
inhibited
no longer exists
detected and latched.
that a condition
caused improper writing on
at
the drive
line
for
for
at least 500ns
Complete
will
go
true
when the R/W heads
or
writing should
SEEK
COMPLETE
will
go false in
drive logic) at power on.
ns
(typ.) after the leading edge
pulse (or the first
COMPLETE
See
Figure
AND
that
particular drive
is
without
at
was
of
a series
is
gated
7.
is
exists
at
further
until
the
that
the
to
reset the
one FAULT
It
is:
the end
not
be
at-
is
false.
two
cases:
initiated
of
of
with
DRIVE
of
a
will
be
READY
1 % up
The
after power on
INDEX --"""'U
to
typical
-----1
true after the drive
speed.
time
for
is
20
1---
II-o"~-----
READY
seconds.
10
microseconds
is
to
become true
19.2
Figure
90 ±
ms
Nom.
9.
Index Timing
-----
u
I 800
I
..
~
I---
microseconds
(RIW
inhibited
servo
function)
for
19
5.3
Data Transfer Lines
All
lines associated
between the drive and the host system are
differential
multiplexed. These lines are provided at the
j2/P2 connector on all drives.
The pairs
transfer in a standard drive are: MFM
WRITE DATA,
ING
ClK.
driver/receiver combination used in the
Q2000 series drives
HIGH
TRUE
in nature and may
of
balanced signals
Figure
..-----=2::::0F:-:::T
with
the transfer
MFM
READ DATA, and
10
illustrates the
for
data transfer signals.
FLAT CABLE
7::MA~X_~
+SIGNAL
-SIGNAL
used
51!l
not
x2
be
for
of
data
data
TIM-
HIGH
TRUE
when in a read mode. Figure
timing
the interface. The actual occurrence
flux
compensation.
5.3.2
The data recovered
recorded track
system via the
READ DATA lines. The transition
MFM
the reversal
the shows the timing
required
5.4
for
MFM
WRITE DATA
reversals may
MFM
READ DATA line more positive than
MFM
was
WRITE GATE
at
the interface.
differ
Read
Data
by
is
transmitted
differential
DATA line indicates a
detected on the track provided
is
for
MFM
Select Status
11
shows the
as
required
due
to
write
reading a pre-
to
the host
pair
of
MFM
of
inactive. Figure 12
READ DATA
of
pre-
the +
flux
at
the
as
Figure
10.
Data Transfer Line
Driver
5.3.1
This
transitions
transition
more positive then the DATA line
track
This
state
than - MFM
MFM Write Data
is a differential
to
be
of + MFM
will
provided - WRITE GATE
signal
pair must
(+
MFM
WRITE
- DRIVE SELECT
-HEAD
-WRITE
SELECT
GATE
pair
written
WRITE DATA line
cause a
be
WRITE
DATA more negative
DATA) by the controller
IL
IL
I
I..
I Receiver
that
defines the
on the track. The
MFM
WRITE
flux
reversal on the
is
active.
driven to
an
inactive
A status line
nector
selection status
The
DRIVE SElECTED line
TTL open
6.
This signal
drive
is
4)
by
proper placement
at
the
vicinity
-
DRIVE SElECT
tivated by the host system.
is
provided at the j2/P2 con-
to
inform the host system
of
the drive.
collector
selected
driver
will
go active
as
drive
"X"
of
of
j1, and the corresponding
"X"
line at
of
the
is
driven by a
as
shown in Figure
only
when the
("X"
= 1,2,3 or
the shorting plug
J1/P1
is
ac-
________________________
______________________ ~ ______________________ _
20
us Max
"I
I
-I
I--
50 ns TO 150 ns
_
+ MFM WRITE DATA
-------------:-~'-----------
460
ns Max
Figure
20
------
11.
..
"'"11
MFM
Write Data Timing
1---
__
1
I---
BIT
CELL=230
ns
TYP
- DRIVE SELECT 1
...
______________________
_
+
MFM
VALID READ DATA
- HEAD SELECT 1
20
us
MAX
--
-WRITE
GATE
...
______________________
--I
1-
..... 1
t--
--I
Figure
I-
BIT CELL = 230 ns TYP
12. MFM Read Data Timing
50 ns TYP
I
(WRITE-REF)
-I I-20
us
_
Max
"21
22
AC
DC
POWER
POWER
6.0 General Timing Requirements
The
timing
shows
(with
per
operation
Note
quence
DC
power on. For this auto-recal sequence
to
function,
normal
at
the same time, seeking
cur
until
No
AC
ON
--.;:)
_
ON
~
0
SEC
TYP
--~I~----------------------------------
.
~
20
SEC
NOM
diagram
the
necessary sequence
associated
that a recalibrate
is
initiated
the Spindle
speed
spindle
or DC
as
timing
of
the
drive.'
automatically
(if
AC and DC are switched on
is
up
power
sequencing
shown in Figure 13
of
events
restrictions)
to
track
must
action
to
speed).
for
zero
se-
at
every
be spinning
will
not
is
required.
pro-
oc-
at
DRIVE
-STEP
READY
-------------1-0-S-E-C--M-A-X-------,~~--~~
,.. "I
- SEEK COMPLETE
-TRACK
HEADS SWITCHED
READ
VALID
-WRITE
WRITE DATA
(FROM
VALID .
000
DATA
GATE
CONTROLLER_)
---
--
~
__________
*
FOR
NORMAL
---
1
.....
I
STEP
---
20J-LS
MODE
MAX
I I
---
---a
---.JI
---I
j
---
~
460ns MAX
~
---
I
'-.
---------
1.0
ms MIN*
---
__
I
Figure 13. General Control Timing Reqirements
23
24
7.0
Power Interface
CONNECTOR
1
2
3
P4
60HZ
110V (Standard)
9O-127V
FRAME GND
90-127 RTN
20B/230V
1 BO-253V
FRAME GND
BO-253V
1
The drive requires both
for
operation. The
drive
motor
and the
AC
power
DC
AC
is
and
is
used
DC
used
for
power
for
the
the elec-
tronics and actuator.
7.1
AC
Power
AC power
to
the drive
is
via J4/P4. The
voltage, frequency and current requirements
100V
VII.
50HZ
220V
1
BO-253V
GND
are given in Table
90-127V 1 BO-253V
FRAME GND FRAME
90-127 RTN
MAX
INRUSH
CURRENT
(Duration *)
RUN
MAX
CURRENT
FREO TOL
*1
sec.
for
2 sec.
for
3 sec.
for
4 sec.
for
@ 117V AC
4.0
1.0
02010
02020
02030
02040
Amps
Amps
± 0.5 HZ
Table VII.
2.0
Amps
0.5 Amps
AC
Power Requirements
TBS TBS
TBS TBS
± 1.0HZ
25
7.2
DC
Power
DC
power
required voltages and curent requirements
are
given in Table VIII.
to
the drive
is
via
P5/J5.
The three
CURRENT
DC VOLTAGE
+ 24 ± 2.4V
p.p
±
p.p
MAX
.....
O.25V
MAX
1V
RIPPLE
+5 ± O.25V
50mV p.p
RIPPLE
17±to
( - 5
50mV
RIPPLE
MAX
16V
OPT)
STEADY OR SEEKING
MAX.
1.5A 1.25A
1.5A
.25A
TYP.
1.0A
.20A
Table VIII. DC Power Requirements
26
8.0
Physical Outline
FRONT
COVER
f
4.50
"'--::.:.-:-:11-+1--
2.43
The mechanical
given in Figure 14.
WARNING: Exercise caution when selecting
mounting screws. The screws must be short
8·32 UNC·2B
MOUNTING
MAXIMUM
HOLES
(16 PLACES)
COMPONENT
enough
stalled and tightened. Failure
warning may result in damage
9.0 Physical Interface
Electrical interface between the Q2000 and
the host system
the
signals
(J2)
HEIGHT
to
not
first
connector
for
the drive; the second connector
provides radial connection
~------'---
-----
::;:
----:
outline
contact
is
through
(J1)
of
the Q2000
the
bubble
four
provides control
PCB
when in-
to
observe this
to
the bubble.
connectors:
of
read/write
~
=*:
4.50
is
MAX
J.--.J...--.l.._
oooJ
7.47
~
1.15
eX)
0
cO
ot,ooJ[
~-------l---L--L-----+---J
4.50
=
LOCK
,..---,
+-
I
I
I
I
+-
_
5.69
ACCESS
SPINDLE
LOCK
2.25
2x
t-
3.50 _
B.OO
-+
if
I
TO
10
I
-+
1.50~
ACTUATOR
ACCESS CUTOUT
~
B.55
-I
..
0.25
Figure
14.
Q2000
14.25
Mounting Dimensions
27
data
signals;
for
(14)
DC
provides
vides
tor
ground. Refer
locations.
the
third
connector
power; and the
for
AC
power and frame
to
Figure 15
J2
SIGNAL
fourth
for
connector
(J5)
connec-
pro-
AC SPINDLE
DRIVE MOTOR
J4-AC POWER
All dimensions in inches
Figure
15.
Mechanical Dimensions and Connector Locations
14.00
J5-DC POWER
28
9.1
J1/P1
Connector
9.3 J5/P5 Connector
Connection
edge connector. Connector dimensions are
shown
through
the
component
pins located on the noncomponent side
the
PCB.
PCB
connector
and
is
tween pins 4 and
mating connector
connector
.400±.010
..i.
II
--:-11-.050
I
BOARD THICKNESS
.062±.007
Figure 18.
9.2
J2IP2 Connector
Connection
edge connector. Connector dimensions are
shown in Figure 17. The pins are numbered 1
through
component
the
mended
flex ribbon connector
slot
is
to
J1
is
through a
in
Figure 16. The pins are numbered 1
50
with
the even pins located
side
of
the
Pin 2
is
located on
closest
labeled. A
PIN 3415.0001.
+-/~
.036 ± .004
L
--
T
.450±:010
-I
t-
.050
NOM
NOM
..
2.S9S±.ooS
J1
to
J2
20
with
the even pins located on
side
mating
provided between pins 4 and
connector
to
KEY
SLOT
6.
The recommended
for
P1
.100
NOM
Connector Dimensions
is
through a 20
of
the
PIN 3461.0001. A key
50
pin
PCB
and
the
end
the
J2
connector
is
provided be-
is
Scotchflex ribbon
50
I I
, I
I I
, I
+j
I--
..I
pin
PCB.
The recom-
for
P2
is
Scotch-
PCB
odd
of
PCB
6.
on
the
.063
of
NOM
DC power connector
Mate-N-lok
mounted
recommended mating connector
PIN
1-480270
J5
pins are labeled on
connector
on the solder side
utilizing
o
®
(J
5)
is
PIN
AMP
J5
connector.
®
®
a 6 pin AMP
1-380999.0
of
the
PCB.
(P5)
is
pins
PIN
60619-1.
The
AMP
Figure 18. J5 Connector
9.4 J4IP4 Connector
AC
power and frame ground are applied
through a 3 pin connector. The pin housing
(J4)
is
mounted in the
1-480701.0
350654-1
mating
1-480700.0
connector
with
(gnd pin). The recommended
with
drive
pins
AMP
(P4)
is
AMP pins
and
PIN
AMP
PIN
is
AMP
350687-1
socket
350536-1.
PIN
PIN
and
_11'-
---r-
...... 2 -
.400±.010
!-
1--1
j.-.050NOM
~
BOARD THICKNESS
.062±.OO7
Figure 17. J2 Connector Dimensions
.036±.004
---,
.4S0±
050
1-.
1.095±
.010
NOM~'
-I
.005
I
'20
.-
.063
.100NOM
NOM
Figure
The disk
(base casting) and
connected together
cated on the
clips.
by removing a ground wire attached
AC
AC
motor
drive
and
and the casting.
19.
J4 Connector
is
shipped
AC
drive
DC
grounds may be separated
with
DC
ground (drive motor)
with
a ground strap lo-
motor
and grounding
ground
to
the
29
30
10.0 Q2000 Recommended Track
Format (in Figure
20)
The purpose
a
data
numbered blocks
Q2000 disk drive
sectored format. Soft sectored means
the beginning
a prewritten identification (ID) field. (Hard
sectored disks use some type
ly
fixed method
ings.) The
contains the physical sector address plus
cylinder and head information. The
is
then followed by a
format
The
tion
only
tate the
tored
format
version
sity format, which
inch
floppy
method used here
modulation
In the example shown (Figure
is
divided
data
field
of
a track
track
into
of
each sector
of
ID
field
shown in figure 20
as
the Q2oo0 drive does
format
of
to
shown
the I.B.M. System 34
disk drives. The encoding
(MFM).
into
32
of
256 bytes in length.
format
smaller, sequentially
of
data called sectors. The
is
intended
identifying sector beginn-
of a soft
user
data field.
be
used. The
is
a slightly
is
commonly
is
modified
sectors. Each sector
is
to
to
have a
is
identified
of
mechanical-
sectored
is
for
not
soft
modified
double
used on 8
frequency
20),
each
organize
soft
that
drive
I.D. field
illustra-
dic-
sec-
den-
track
has
by
a
The beginnings
data
field
called address marks.
An address mark
first
byte
This
is
followed
which
dress mark pattern.
CRC
ticular
is
the pattern used
address mark,
The
"A1" pattern
the encoded rules of MFM by omitting one
clock bit.
unique to any other serial
I.D. and data field
Each
bits
of
cyclic
or
32
bits
ed
for
data verification and correction. Each
or
ECC
data pattern.
Surrounding the
called interrecord
of
both the I.D.
are flagged by unique characters
is
2 bytes in length. The
is
always
This
of
polynominal
an
"A1"
by either
or
an
"FB"
is
made unique by violating
makes
redundancy check
Error Correction Code
the
I.D. and
gaps.
address
bit
is
data
field
data pattern.
an
"FE"
pattern
to
define an I.D.
which
is
is a data
mark pattern
combination.
followed
(CRC)
unique
field
and the
by
or
(ECC)
for
are gaps
ad-
16
24
us-
a par-
31
10.1
GAP LENGTH CALCULATIONS
10.1.1
Gap 1's purpose
ing recovery period
heads
tial
Gap 1
is
to
provide
so
from
one surface
sectors may be read
that
to
without
the rotational latency time.
at
least
11
bytes long
the head switching
Gap 1 is
field
immediately
for
the I.D.
time
field
which
of
followed
of
the
10.1.2 Gap 2
Following
I.D.
provides a known area
write
of
this gap also serves
for
the data
of
gap 2
lock
the I.D. field, and separating the
field
from
the data
field
for
update splice
field
is
determined by the
up
performance.
to
occur. The remainder
as
the sync up area
address mark. The length
10.1.3 Gap 3
Gap
3,
following
variation
tolerance area. This allows
situation where a
while
the disk
nominal, then
running
3%
variations). Gap 3 should be
bytes in
length.
the data field,
track
has
is
running
write
3%
updated
faster than nominal (power line
a head switch-
by switching
another, sequen-
waiting
Gap
1 should be
corresponds
for
to
20 microseconds.
by a sync
first
sector.
is
gap
2.
Gap 2
the
data
field
data
separator
is
a speed
for
a
been formatted
slower than
with
the disk
at
least 15
10.1.4 Gap 4
Gap 4
is a speed
track. This
faster than normal without overflowing the
track during the format operation.
operation, starts with the first encountered
dex and continues writing a fixed number
fields.
These
next index.
10.2
Write Precompensatlon
Whenever
imity
to
each other, a phenomenon called
superposition occurs,
pulse
cause the
other. This
Other
phenomenon such
speed variation, etc.,
shift,
but
to
effect
The
technique
This technique requires detecting those
cases
where bits
ximity
timing
to
each other and alters the
of
these bits. The bits are then
ten earlier
sate
for
the expected shift.
Since
bit
crowding
most tracks, the effects
tion
cause the greatest
Therefore,
ly
be used when
greater than
tolerance buffer
allows the disk
to
for
rotate
fields must be written prior
two
bits are
written
in close prox-
which
two
bits
to
move away
is
a large
factor
as
will
of
bit
random noise,
also cause
a lesser degree.
of
bit
shift
can be reduced
called
write
precompensation.
will
be
written
or
later than normal
is
greatest on the inner-
of
pulse superposi-
shift
on these tracks.
write
precompensation should on-
writing
on
track
in close pro-
to
255.
the entire
at
least
The
format
to
tends
from
shift.
bit
by
write
writ-
compen-
numbers
3%
in-
of
ID
the
to
each
a
The
INDEX-11L---
______________________
I.D. A.M.
~\~\--------------------------------------~~
NOTE 5 DATA A.M.
optimum
for
the Q2000
early and
DATA
256 X USER
FIELD
late
DATA
amount
is
12 nanoseconds
written
NOTES
U~~~~--------------------------~
• NOTES:
1.
NOMINAL TRACK CAPACITY - 10416 BYTES.
2.
MINIMUM TRACK CAPACITY - (NOMINAL -
3.
WRITE
TO
4.
5.
READ RECOVERY TIME = 20 MICROSECONDS.
HEAD SWITCHING TIME = 20 MICROSECONDS.
CHECK BYTES MAY
BE
2 BYTES OF CRC
Figure
3%
SPEED VARIANCE) 10102 BYTES.
OR 3 OR
4 BYTES OF ECC.
20.
Track Format
32
of
pre-compensation
for
bits.
GAP3
15X'4E'
GAP4
352 X '4E"
both
IX
shows
data
bit
MFM
patterns, the
write
recording.
Table
pected
precompensate direction and the type
pulse
bit
shift direction, the
to
write
for
ex-
of
DATA
PATTERN
4 3 2 1
0
·0
0 0
0 0
0
0 0 1 0
0 0
1 1
0 1 0 0
0
0 1
0
1
1
1
1
1 1 0 0
1 1 0
1
1 1 1
1
1 1 1
0
1
0 0 0
0
0
0
1 1
0
1
1 1
1
1
0
1
0
1
0
1
EXPECTED
OF
PULSE
SHIFT DIRECTION
FOR
CElL 2*
NONE ON TIME CLOCK
LATE
NONE ON TIME
EARLY
NONE
NONE NO
LATE
NONE
EARLY
NONE
NONE
EARLY
NONE
NONE
LATE
NONE
PRECOMPENSATE
AND
PULSE
EARLY
LATE
NO
CLOCK
CLOCK
EARLY
ON TIME
LATE
ON TIME
ON TIME DATA
LATE
NO
CLOCK
NO
CLOCK
EARLY
ON TIME
FOR
CLOCK
DATA
DATA
OR
DATA WRITTEN
OR
DATA WRITTEN
DATA
DATA
CLOCK
CLOCK
DATA
OR
DATA WRITTEN
OR
DATA WRITTEN
DATA
DATA
Table IX
DIRECTION
CElL 2*
The write data bits are shifted through a 4
bit
shift register
that require precompensation and
mine what type
clock pulses are written on the disk according
to
the rules
written on time, early or late in the cell
period according
pected shift. Timing
period
shifted
the
*Determination
tion
ten from cell
for
into
bit
is
shifted
is
made in cell
to
detect those patterns
to
deter-
of
pulse
to
write. Data
for
MFM recording, and are
to
the direction
is
such that the cell
a pulse starts when the data
position three and ends when
into
position four.
of
pulse and precompensa-
2,
however pulse
3.
of
ex-
is
or
bit
writ-
is
33
34
11.0
INSTALLATION INSTRUCTION
Figure
21.
11.1
11.2
11.3
Required Tools:
1. Common Screwdriver
2.
11/32 inch socket
driver
or
hex
nut
Unpacking Instruction:
a)
Carefully remove drive
ping container, inspect
damage.
b)
Do
printed
Do
Not
not
set drive down on its
circuit
board.
Drop!
from
for
ship-
Motor Locking Clip Disengagement
a)
Stand drive on edge
drive motor.
b)
Loosen 11/32 inch hex nut.
c)
Rotate locking
pulley. Do
d) Retighten 11/32 inch hex nut.
(See
not
to
unlock
Figure 21.)
clip
away
from
rotate pulley.
Figure
22.
11.4
Unlock
lock
turn)
located on the
Figure 22.)
Actuator Lock
actuator
CCW
as
far
Do
Not
Force. The
by rotating the
as
it
will
go
actuator
bottom
of
the drive.
actuator
(approx.
lock
1f2
is
(See
35
11.5
11.5.1
Designator
Drive
Jumper Options (Fig.
-5/-15
DS1,2,3,4
A
C
E3
E4
Options
23)
Description
The drive requires -
(-5V
position)
regulate higher negative
voltages
(-15
mally
jumper
Four drive select jumpers
allow
ment.
Causes
constantly.
When jumpered, allows
6
REZERO
the drive to recalibrate
Use
mended since
than standard recalibration
sequences and the drive
goes through
recal ibration.
When jumpered, disables the
fine servo
purposes.
When jumpered, causes the
microprocessor
seek diagnostic routine.
from
position). Drive
shipped
in the
logical drive assign-
drive
to
to be
of
this
option
an
for
maintenance
5V
but
will
-7
to
-16
is
with
the
-15
position.
be selected
used
to
is
recom-
it
is
faster
internal
to
perform a
DC
nor-
J1
pin
cause
11.6 Control
If
drive
is
control
pack must
The terminator pack must be removed
location
a string
terminator
signal cable, a 220/320 terminator
of
Line
the last drive
be
installed
6J
if
this drive
drives. The
pack
is
13-12302.
Termination
at
the end
at
PCB
location
is
not
at
Quantum
of
the
the end
PIN
for
6J.
from
the
12.0 Shipping Instructions
In the event
be repacked
procedure:
12.1
Lock the actuator by rotating the actuator
lock
CW
Do
not
12.2 Motor
Enagage drive
(See
Figure
a)
Loosen 11/32 inch hex nut.
b) Rotate locking
pulley.
c)
Tighten 11/32 inch hex nut.
that
for
Actuator
as
far
forcel
Locking
motor
21).
the Q2000 drive needs
shipment, use the
Lock
as
it
will
go (approx.
(See
Figure
22).
Clip Engagement
locking
clip
until
clip
engaged in
to
following
1A
turn).
12.3 Packaging
Carefully place the drive in a padded ship-
copy
of
ping container and enclose a
packing/unpacking instructions, Quantum
PIN
81-40162.
the
of
11.5.2 Cut Trace Options
Designator
B
T1-T5 These options are
Description
third
The
(-
head select
ed
desired
other than
be
from
customer use. They are used
for
head select line
22)
to
pin 4
of
J1.
to
use a pin on
4,
this trace may
cut
and a wire added
"B"
to
the desired pin.
factory
test only.
36
is
attach-
If
it
not
Secure container and ship.
is
J1
for
H
G F E 0
C
B A
0
r--
1
GND
TPl
TP5
000
o TP1
TP6
o TP3
TP2
[]
2
'-
o
TP4
'"
00
T1
3
""
L--
J3
il
~
c o TP8
i
TP9
4
a
~
~
1:1
.----
~
B
0
00
0
OJ
DO
C
5
GND
'---
C'-.
=
B
A
c:
3
"0
CD
6
....
g
T5
r-
OO
051
DO
052
0
0
DO
053
0
DO
054
TP10
$I)
00
A
-
7
o·
E3
::l
gg
rh
E4
0
L--
8
TPll
g;
a a
DJ4
TP13 TP12
~
9
J5
0
o
TP15
TP14
r-----'
a
I
I
TP16
I
I
-15V
a ,..-,
I
a
I
I
I
a
-5V
I
I
I
I
I
I
1oL
______
J
I
I :
L
_.J
J6
H
G F E D C
Co)
"
38
APPENDIX A
Definition of Terms
A.
Read/write head
The read/write head
transducer element which writes data
reads data from the magnetic media. The
read/write heads
technology drives are aerodynamically constructed such that they
the media at a height
heads
are in contact
media
is
not rotating.
B.
Media
The media
aluminum
flat
and in the shape
lubricated
of
the heads
media
to
give maximum signal
C.
Surface
A media surface
drive.
read/write head
Figure
is
substrate (platter)
to
without
or
heads. The media
Surface 0
24.
is
a ferrite magnetic
to
or
for
use
on "Winchester"
fly
over the surface
of
20
microinches. The
with
the media when the
See
Figure
a magnetic oxide coated on
of
a disk. The media
aid in the take
damage
output.
is
one side
is
the area
0 writes and reads data.
24.
which
off
is
of
of
is
and landing
to
either the
also oriented
a disk in the
a disk where
very
of
an
is
See
D.
Track
A track
surface
track
spacing is.00285 center
numbered
with
Figures 24 and
E.
A cylinder
recording surfaces
tion
tum
F.
An
over the desired
tuator
the
tached
are attached
tuator
are moved over the surface
can access any track.
is
a ring
of
a disk where
is
.0023 inches
000
track
511
Cylinder
is
or
location.
2000 series
Actuator
actuator
consists
actuator
to
the motor. The read/write heads
arm.
As
of
constant radius on
data
wide
to
to
511
on the
being the innermost.
25.
a set
of
tracks on
at
a given
See
Figure
drive
has
512
positions the read/write heads
track
or
cylinder. The ac-
of a rotary
arms. The
to
the other end
the
actuator
motor
rotates, the heads
the
is
stored. A
and the
center. Tracks are
24.
torque
track
Quantum
See
multiple
actuator
The Quan-
cylinders.
motor
arms are at-
of
the ac-
of
the disks and
drive
posi-
and
39
o.
Shipping and landing zona
The shipping and landing zone
area inside
tioned over this area
time
minimum
3000
zone
not
contact
This adds
on the
of
track 511. The heads are posi-
that
the disks
of
90%
RPM.
This area
for
the heads such
the surface in usable data areas.
to
the data
Quantum
at
power
are
not
of
the nominal speed
is
a designated landing
that
reliability
drives.
See
is a circular
off
or
any
spinning at a
the heads
and integrity
Figure
25.
H. Winchester Technology
The term "Winchester Technology" when
ed in reference
many things. Rigid disk drives utilizing
chester Technology
low
mass
These heads
ter at a height
mal
operation
media when the
media used on the
that there
when the
to
rigid disk drives means
Win-
use
continuously loaded,
high compliant head assemblies.
fly
over the surface
of
20
microinches during nor-
but
rest on the surface
platter
platters
is
no damage
two
come into contact.
is
to
not
of
the plat-
of
spinning. The
is
lubricated such
head or media
of
do
us-
the
The environment in which the heads and
platters reside
to
free
height.
allow
is
sealed and contamination
the
20
microinch
head
flying
I. Disk/Platter
A disk
substate upon which magnetic oxide
deposited
two
or
platter
or
surfaces
is
a very
coated. Each disk/platter
for
recording information.
flat
circular
is
has
40
ACTUATOR
ARM
READ/WRITE
HEAD 5
TRACK
MAGNETIC
MEDIA
COATING
Figure
24.
Typical Quantum Disk Drive Organization and Terminology
SHIPPING AND
LANDING ZONE
RADIUS 2.050
TRACK
RADIUS 2.155
RADIUS 3.637
511
TRACK 0
Figure
25.
Data Area and Landing Zone
4 1
42
APPENDIX B
MEDIA DEFECTS & ERRORS
Introduction
In a high density
system
ability
mance by
correction
the
errors
errors are
additional
are shifted
be
These errors are
as
contributes
rence. The
noise and phase characteristics
media, Read/Write circuits, and heads and
the
What
An error
recovered
data. There can be an extra
bit, i.e., a
"one"
Errors can be classified
rors.
signal
sent marginal
and Read/Write circuits.
it
is
and
providing
predominant
ocurring
normally
bits. Errors
tolerated
well
as a low
accuracy
Is
The Definition Of
is
data
"zero"
or a "one"
Soft
errors are
to
noise
digital
necessary
improve
scheme. For disk storage systems,
error
in one
further
by
the
due
signal
to
probability
error
rate
of
actuator
any discrepancy between
and true,
can be
ratio
conditions
recording storage
to
increase
the
operational
an
error
pattern
or
more
absent bits (dropouts)
may
occur
from
nominal
data separator.
to
defects in the
to
noise
of
is
dependent
positioning.
correctly
transformed
can be changed
into
generally
of
the
system and repre-
of
the
detection
is
a burst
tracks. These
when bits
than can
ratio
error
occurupon
of
the
An
Error?
recorded
bit
or
a missing
to
soft
or
hard er-
related
the
head, media,
perfor-
reli-
and
media
that
into
zero.
to
of
or
the
the
If
an
error is repeatable
bability,
defect
it
and
is due
is
most
termed
with
a high pro-
often
to
a media
a hard error.
How will Quantum Find the Errors?
The errors
ment
usable
those
capability.
test system
treme marginal
amplitude
recorded
ped
reporting
and
information
format
defective
on
will
be
any
will
be
identified
incorporated
to
enable
locations per his system
Quantum
which
conditions
and phase
the
disk storage.
accompanied
media
the
has a
unique
exercises the
and measures
distortion
by an error
defects.
prior
user
drive
of
All
to
to
media
each
drives ship-
ship-
in a
skip
in ex-
the
bit
map
43
Error
Reporting
An error map
drive
showing defective areas. The areas
be
identified
number
bits in length.
guaranteed
Error
Acceptance Criteria
There
will
defects per surface
tracks
A single
than 2 bytes long. A
defined
long,
will
or
will
be provided
by cylinder and head address,
of
bytes
from
index, and number
Additionally,
to
be error free.
be
no
more than 12 tracks
of
which
contain
defect
as
an
a single error in several sectors.
multiple
is
defined
error greater than 2 bytes
as
multiple
with
each
cylinder 000
with
no more than 4
defects.
an
error less
defect
is
a
will
of
is
44
APPENDIX C
Ordering Information
1. Table X provides the
AB
CAPACITY
/
CAPACITY C
AB
10
41
42
43
44
Example: 42010 = 20MB, Cabinet, 50 Hz, 110VAC
MB
20 MB
30 MB
40
MB
0
1 NO
Table X. Product
C
CABINET
OPTION
I
CABINET
YES
FREQUENCY VOLTAGE
D
0
1 50Hz
Selection
necessary
number
D E
to
construct a unique
for
a Q2000 rigid disk drive.
\
FREQUENCY
60Hz
Index
information
~
VOLTAGE
E
0
110VAC
1
220VAC
part
POWER
VOLTAGE
110VAC 60 Hz
110VAC 50 Hz
220VAC 60 Hz
220VAC 50 Hz
AND
FREQUENCY
2.
3.
MOTORASM
74-40109
74-40109
74-40111
74-40111
Accessories
a)
Signal Cable Connector
7340157
b)
DC
Power Connector
7340158
c)
AC
Power Connector
7340159
AC
voltage
sion.
power voltage and
following
necessary components.
PART NUMBERS
40-40015
40-40032
40-40015
40-40032
or
Frequency Conver-
If
it
is
required
table indicates the
PULLEY BELT
Kit
PIN
Kit
PIN
Kit
PIN
to
change
or
frequency, the
50-40000
50-40001
50-40000
50-40001
AC
Table XI. Voltage and Frequency Conversion
Information
45
Loading...