M 4 0 2 0 MINISCRIBE
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 5.25"/FH Cylinders 480| | |
Capacity form/unform 17/ 20 MB Heads 4| | |
Seek time / track 99.9/ 3.0 ms Sector/track 17| | |
Controller MFM / ST412 Precompensation
Cache/Buffer KB Landing Zone 479
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 |
idle W Shock g |
seek 23.0 W Rotation RPM 3600
read/write W Acoustic dBA
spin-up W ECC Bit
MTBF h 8000
Warranty Month
Lift/Lock/Park NO Certificates
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L A Y O U T
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MINISC. 2006/2012/4010/4020 PRODUCT MANUAL P/N 1000 REV. B
+---------------------------------------------------------+
| |XX Power
| |XX J3
| |
| |XX
| |XX
| |XX J2
| Shunt--+ Terminator-+ |XX
| | | | | | 2
| | | | | |
| | | | | |
| +--1 +-1 |XX
| |XX J1
| |XX
| |XX
| |XX
| |XX
| |XX2
+---------------------------------------------------------+\J4
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J U M P E R S
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MINISC. 2006/2012/4010/4020 PRODUCT MANUAL P/N 1000 REV. B
Jumper setting
==============
Customer optional features are implemented via a shunt block on the
Printed Circuit Card.
SHUNT BLOCK
+----------+
| 1 16 | Radial
| 2 15 |
| 3 14 | Factory Set
| 4 13 | Factory Set
| 5 12 | Drive Select 4
| 6 11 | Drive Select 3
| 7 10 | Drive Select 2
| 8 9 | Drive Select 1
+----------+
Drive Select
------------
As shipped, the 16-pin shunt block has all pin pairs shorted with
the "Radial" option selected.
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 input and output signals are enabled when the appropriatte
-DRIVE SELECT line is activated.
Drive Exercise Option
---------------------
As shipped, the 16-pin shunt block has pin pair 2/15 shorted. This
shunt is used to initiate drive exercice routines.
The microprocessor performs a series of "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 test the shunt block to
determine the state of pin pair 2/15 (drive exercise option).
If pin pair 2/15 is shorted, 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 open, the drive will enter the exerciser routine.
Having checked the stepper motor phasing during diagnostics, the
processor will flash the proper phasing via the Activity LED. This
code flashing sequence is repeated two times.
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.
Track Zero Phasing
------------------
Pin pair 3/14 and 4/13 are set at the factory and should not require
changing. They establish information about the track zero sensor and
stepper motor phasing relationsship.
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I N S T A L L
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MINISC. 2006/2012/4010/4020 PRODUCT MANUAL P/N 1000 REV. B
Installation routines
=====================
Mounting
--------
The drive should be mounted to the customer frame through the
mechanically isolated mounting points on the bottom or sides of the
drive using 6-32 machine 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.
Mechanically isolated mounting points
-------------------------------------
Four side mounting and four base mounting points are provided to the
customer. Each mounting point is mechanically isolated from the
drive.
Cabling
-------
Arrach interface cables with connectors P1, P2, P3 and P4 to to J1,
J2, J3 and J4 respectively. If multiple drives are to be inter-
connected, remove the terminator packs in all but the last drive of
the daisy chain.
Terminators
-----------
Each drive is shipped with a terminator pack providing the 220/330
ohm termination for the Controller Input Signals. If multiple drives
are configured in a daisy chain configuration, the terminator pack
must be removed from all drives except the last unit on the daisy
chain.
J1/P1 Control Signal Connector
------------------------------
Connection to J1 is through a 34 pin PCB edge connector. The pins are
numbered 1 through 34 with the even pins located on the component
side of the Printed Circuit Card. A key slot is provided between pins
4 and 6.
The recommended mating connector (P1) is AMP Ribbon Connector P/N
88373-3.
J2/P2 Data Signals Connector
----------------------------
Connection to J2 is through a 20 pin edge connector. The pins are
numbered 1 through 20 with the even pins located on the component
side of the Printed Circuit Card. A key slot is provided between pins
4 and 6.
The recommended mating connector (P2) is AMP Ribbon Connector
P/N 88373-6.
P3 DC Power Connector
---------------------
DC power connector (J3) is a 4 pin AMP Mate-N-Lok Connector P/N
350211-1 mounted in a cable extended 4 inches from the drive.
The recommended mating connector (P3) is AMP P/N 1-480424-0 utilizing
AMP pins P/N 350078-4.
+------------+
| 4 3 2 1 |
+------------+
J4/P4 Frame Ground Connector
----------------------------
Fasten AMP P/N 61761-2.
Recommended mating connector is AMP P/N 62187-1.
If used, the hole in J4 will accommodate a wire size of 18 AWG max.
Electrical Interface
--------------------
The interface to any MiniScribe II and IV 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 J1 and J2 should be
grounded at the controller.
The voltage return lines of J3 should only be grounded at the power
supply.
Connector J4/P4 is a spade lug connector tied to frame ground.
For optimum immunity to electro-magnetic interference and electro-
static discharge, the spade lug connector should not be tied to
system ground.
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F E A T U R E S
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MINISC. 2006/2012/4010/4020 PRODUCT MANUAL P/N 1000 REV. B
Introduction
------------
The Miniscribe II and IV are random access 5 1/4 inch rigid media
disk drives employing Winchester technology. All models utilize
rack-and-pinion actuators, microprocessor control, and open loop
stepper head positioning. Unformatted capacity ranges from 6.4 MBytes
to 20 MBytes, depending on the number of heads, disks, and tracks per
inch.
All models feature power up diagnostics, head shipping zone, buffered
seek, and 5 MBit transfer rate. DC voltages and physical form factor
are the same as the 5-1/4 inch floppy drives.
Seek time
---------
|MiniScribe II |MiniScribe IV
----------------------------+--------------+--------------
Single Track | 3 ms | 3 ms
Average* | 93 ms | 133 ms
Maximum* | 229 ms | 349 ms
Average Latency | 8.33 ms | 8.33 ms
----------------------------+--------------+--------------
*Buffered including settling time
Reliability and Maintenance
---------------------------
MTBF 8,000 hours (continuous operation)
MTBF (Typical Usage) 10,000 hours
MTTR 30 minutes
Preventive Maintenance None required
Component Design Life 5 years
Media Defects Criteria
----------------------
Media defects as shipped from MiniScribe:
Model 2006 and 4010 10 defects maximum <2 bytes in length
Model 2012 and 4020 20 defects maximum <2 bytes in length
Cylinder 000 defect free.
Drive Mechanism
---------------
A brushless DC direct drive motor rotates the spindle a 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, equalized
above atmoshperic pressure environment to the heads and disks.
Head Positioning Mechanism
--------------------------
Two or four read/write heads are supported by a carriage mechanism
coupled to the 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.
Track 000 Detector
-------------------
The Track Zero Detector resides within the sealed enclosure. This
optical sensor consist of a light source (activated only when a seek
is initiated) and a receiver which when blocked by the positioner
assembly indicates the logical/physical track 000.
