M 3 0 1 2 MINISCRIBE
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 5.25"/HH Cylinders 612| | |
Capacity form/unform 10/ 12 MB Heads 2| | |
Seek time / track 99.9/ 3.0 ms Sector/track 17| | |
Controller MFM / ST412 Precompensation 128
Cache/Buffer KB Landing Zone
Data transfer rate 0.625 MB/S int Bytes/Sector 512
0.625 MB/S ext
Recording method MFM operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 4 46 | -40 57
Power: sleep W Humidity % 8 80 | 8 80
standby W Altitude km -0.061 3.048| 12.192
idle 18.0 W Shock g 4 | 40
seek W Rotation RPM 3600
read/write W Acoustic dBA 50
spin-up W ECC Bit
MTBF h 10000
Warranty Month
Lift/Lock/Park NO Certificates CSA,FCC,UL1950
**********************************************************************
L A Y O U T
**********************************************************************
MINISC. 3012 PRODUCT MANUAL P/N 1002 REV. B, 2/8/1984
+---------------------------------------------------------+
| Terminator--++---+ |XX
| | || | |XX P2
| +--+| | |XX
| +---+ |XX
| Shunt | 1
| |XX
| |XX
| |XX
| |XX
| |XX P1
| |XX
| |XX
| |XX
| |XX
| | 1
| |XX P3
| |XX Power
+---------------------------------------------------------+
**********************************************************************
J U M P E R S
**********************************************************************
MINISC. 3012 PRODUCT MANUAL P/N 1002 REV. B, 2/8/1984
Jumper Setting
==============
Drive Selection
---------------
As shipped, the 16-pin shunt block has all pin pairs shorted with the
"Radial" option selected. To select the desired drive number in a
daisy-chain operation, refer to the following table.
Drive select number
Pin Pair 1 2 3 4
---------------------------------------------
8 - 9 CLOSED OPEN OPEN OPEN
7 - 10 OPEN CLOSED OPEN OPEN
6 - 11 OPEN OPEN CLOSED OPEN
5 - 12 OPEN OPEN OPEN CLOSED
1 - 16 OPEN OPEN OPEN OPEN
Radial Option
-------------
As shipped, the 16-pin shunt block has pin pair 1/16 shorted result-
ing in a radial operation. In this case, all input and output signals
are enabled, even if the drive is not selected. However, the front
panel LED will not be on. -DRIVE SELECT must be active to light the
LED. When pin pair 1/16 is open the drive is in a daisy chain mode
where output signals are active when the appropriatte -DRIVE SELECT
line is activated.
Drive Exercise Option
---------------------
As shipped, the 16-pin shunt block has pin pair 2/15 open. This shunt
when shorted will initiate drive exercise routines.
The microprocessor performs "wake uo" diagnostics upon application
of power. If an error is detected, the processor will flash an
warning by blinking the Activity LED. Some errors are fatal in that
they do not return to the program until power is cycled.
If no errors are detected, the processor tests the shunt block to
determine the state of pin pair 2/15 (drive exercise option).
If pin pair 2/15 is open, the drive will become ready. During
normal operation, the drive will continue to monitor some functions
such as soin speed and indicate an error if it occurs.
If pin pair 2/15 is shorted, the drive will enter the exerciser
routine.
The drive then does a seek to the shipping zone and turns the LED on
solid. The heads will remain at the shipping zone for 5 seconds
during which time the drive can be powered down for shipment. At the
end of the 5 second period the drive will initiate an actuator
exercise routine which does a random seek for approximately 5 days.
Terminators
-----------
Each drive is shipped with a terminator pack providing the 220/330
ohm termination for the Control Input Signals. If multiple drives are
configured in a daisy-chain, the terminator pack must be removed from
all drives except the last unit on the daisy chain.
**********************************************************************
I N S T A L L
**********************************************************************
MINISC. 3012 PRODUCT MANUAL P/N 1002 REV. B, 2/8/1984
Notes On Installation
=====================
Installation direction
----------------------
horizontally vertically
+-----------------+ +--+ +--+
| | | +-----+ +-----+ |
| | | | | | | |
+-+-----------------+-+ | | | | | |
+---------------------+ | | | | | |
| | | | | |
x x | | | | | |
+------x------x-------+ | +-----+ +-----+ |
+-+------x--x-------+-+ +--+ +--+
| xx |
| x x |
+---x--------x----+
x x
Recommended Mounting Configuration
----------------------------------
The MiniScribe 3012 half height drive is designed to be used in
applications where the unit experience shock and vibrations at
greater levels than larger and heavier disk drives.
To take full advantage of the shock mounts, it is necessary to
provide a 0.1 inch clearance on both the top and bottom of the drive.
This clearance allows for movement of the drive during acceleration.
This implies that if the drive is mounted by the bottom mounting
holes on a flat surface, standoffs are needed under the mounting
holes. No special considerations are required if the drive is mounted
using the side mounts except for the clearance on top and bottom. The
drive may be mounted in any attitude except upside down.
The drive is mounted using 6-32 UNC tap screws, 1/4 inch maximum
penetration. The customer should allow adequate ventilation to the
drive to insure reliable drive operation over the operating
temperature range.
Cabling
-------
Connect interface cables with connectors P1, P2, P3 and P4 to J1, J2,
J3 and J4 respectively. If multiple drives are to be interconnected,
remove the terminator packs in all but the last drive in the daisy
chain.
J1/P1 Control Signal Connector
------------------------------
Connection to P1 is through a 34 pin PCB edge connector. The pins are
numbered 1 through 34 with the odd pins located on the component side
of the Printed Circuit Board A key slot is provided between pins 4
and 6.
The recommended mating connector (J1) is AMP Ribbon Connector P/N
88373-3.
J2/P2 Data Signals Connector
----------------------------
Connection to P2 is through a 20 pin edge connector. The pins are
numbered 1 through 20 with the odd pins located on the component side
of the Printed Circuit Board. A key slot is provided between pins 4
and 6.
The recommended mating connector (J2) is AMP Ribbon Connector, P/N
88373-6.
P3 DC Power Connector
---------------------
DC power connector (P3) is a 4 pin AMP Mate-N-Lok Connector, mounted
on the PCB.
The recommended mating connector (P3) is AMP P/N 1-480424-0 utilizing
AMP pins P/N 350078-4.
+------------+ Pin 1 +12 Volts DC
| 4 3 2 1 | Pin 2 +12V Ground Return
+------------+ Pin 3 +5V Ground Return
Pin 4 +5 Volts DC
J4/P4 Frame Ground Connector
----------------------------
Fasten AMP P/N 61761-2.
Recommended mating connector (J4) is AMP P/N 62187-1.
If used, the hole in P4 will accommodate a wire size of 18 AWG max.
Electrical Interface
--------------------
The interface to the MiniScribe 3012 can be divided into three
categories each of which is physically separated: Control Signals,
Data Signals and DC Power.
All control Signals are digital in nature (open collector TTL), and
either provide signals to the drive (input) or signals to the
collector (output). The Data Signals are differential in nature and
provide data either to (write) or from (read) the drive.
The interconnect cable between the drive and controller may be
flat ribbon or twisted pairs of a length not to exceed 20 feet. The
signal return lines and ground lines for P1 and P2 should be grounded
at the controller.
The voltage return lines of P3 should only be grounded at the power
supply.
Connector J4/P4 is a spade lug connector tied to frame ground.
Drive Mechanism
---------------
A brushless DC direct drive motor rotates the spindle at 3600 rpm.
The motor/spindle assembly is dynamically balanced to provide minimal
mechanical runout to the disks. A dynamic brake is used to provide a
fast stop to the spindle motor when power is removed.
Air Filtration System
---------------------
Within the sealed enclosure, a 0.3 micron filter coupled with a
breather filter provides over the drive life a clean, above
atmospheric pressure environment to the heads and disks.
Head Positioning Mechanism
--------------------------
Two read/write heads are supported by a carriage mechanism coupled
to the rotation stepper motor through a rack-and-pinion motion
translator. The rack-and-pinion translator allows for the increased
number of data tracks while retaining the full step holding torque
and positioning repeatability characteristics of the stepper motor.
Power Sequencing
----------------
+5 volts DC and +12 volts DC may be applied in any order.
+12 VDC powers the spindle drive motor. The microprocessor verifies
that the disks are spinning at 3600 rpm and then activates the
automatic Track Zero positioning. -TRACK ZERO, -SEEK COMPLETE, and
-READY will beome true upon completion of the Track Zero positioning
sequence.
Cable Interconnection - 4 Drive System
--------------------------------------
+-----------+ +-----------------+
| +---o---Control------------------+P1 Drive 1 |
| | | +-------Data------------+P2 |
| | | | +-Power---+P3 P4 ... |
| | | | | +-----+-----------+
| | | | | +-Frame----+
| | | | | | +-----------------+
|Controller | o----+-------------+----+----|P1 Drive 2 |
| | | | +-----------+----+----+P2 |
| | | | | o----+----+P3 P4 ... |
| | | | | | | +----+------------+
| | | | | | o---------+
| | | | | | | +-----------------+
+-----------+ o----+-+-----------+----+----+P1 Drive 3 |
| | | | | +---------+----+----+P2 |
| +---+----+ | | o----+----+P3 P4 ... |
| +---+------+ | | | +-----+-----------+
| | | | | o----------+
|Data +---+--------+ | | +-----------------+
|Separator | +------------------+----+----+P1 Drive 4 |
| +----------------------+----+----+P2 |
| | o----+----+P3 P4 XXX |
+-----------+ | | +-----+-----------+
DC voltages----+ o----------+
|
Frame Ground--------+
... = Terminator Pack removed
XXX = Terminator Pack installed
Caution/Warning
---------------
The Miniscribe 3012 is a precision product weighing 5.5 lbs. During
handling the unit must not be dropped, jarred or bumped. Otherwise,
damage to the heads and disks may occur.
**********************************************************************
F E A T U R E S
**********************************************************************
MINISC. 3012 PRODUCT MANUAL P/N 1002 REV. B, 8/2/1984
Introduction
------------
The MiniScribe 3012 is a half-height random access 5-1/4 inch rigid
media disk drive employing Winchester technology. The drive utilizes
a rack-and-pinion actuator, microprocessor control, and open loop
stepper head positioning.
The Model 3012 features power up diagnostics, head shipping zone,
buffered seek and 5 Megabit/Sec. transfer rate. D.C. voltages and
physical form factor are the same as the 5-1/4 inch half height
floppy disk drive.
Seek Time (including settling time)
-----------------------------------
+----------------------------------+--------+
| | 3012 |
+----------------------------------+--------+
|Track-to-Track msec. typ. | 3 |
+----------------------------------+--------+
|Average msec. typ. | 160 |
| msec. max. | 420 |
+----------------------------------+--------+
|Latency msec. avg. | 8.33 |
+----------------------------------+--------+
Track Zero Detector
-------------------
The Track Zero Detector resides on the stepper motor. This optical
sensor consists of a light source (activated only when a seek is
initiated) and a receiver which when blocked by an interrupter on the
motor shaft indicates one of several logical Track Zero positions.
The microprocessor determines the physical location of Track Zero
from the redundant logical Track Zeros.
Media Defect Criteria (as shipped from MiniScribe)
--------------------------------------------------
Model 3012 20 defects maximum
< 2 bytes in length
Cylinder Zero Defect Free
Error Messages
--------------
The microprocessor performs wake up diagnostics on power up.
Additionally, some operations are monitored during normal operations.
If an error is detected, the microprocessor will flash a warning by
blinking the activity LED.
Zero = 0.1 second flashing mode
One = 0.6 second continuous ON mode
Between Bits = 0.6 second Off
Between Repeat Cycles = 2.0 second Off
Listed Below are the binary to hexadecimal conversion values:
0 = 0000 4 = 0100 8 = 1000 C = 1100
1 = 0001 5 = 0101 9 = 1001 D = 1101
2 = 0010 6 = 0110 A = 1010 E = 1110
3 = 0011 7 = 0111 B = 1011 F = 1111
Message Definitions
-------------------
Code 0 - Microprocessor RAM error
Code 1 - Microprocessor ROM checksum error
Code 5 - Unable to detect motor spinning
Code 6 - Spin motor failed margin test
Code 7 - Unable to maintain spin speed
Code 8 - Unable to uncover Track 000 sensor
Code 9 - Unable to cover Track 000 sensor
Code A - Interrupter Phase Error (factory phase adjust)
