Conner Peripherals, Inc.
CP3100 SCSI
Intelligent Disk Drive
Product Manual
Revision VI
May, 1990
3081 Zanker Road
San Jose, CA 95134-2128
(408) 456-4500
Japan (81) 3-597-8321 Europe (49) 89-811-2097
Notice
Conner Peripherals makes no warranty of any kind with
regard to this material, including, but not limited to,
the implied warranties of merchantability and fitness
for a particular purpose. Conner Peripherals shall not
be liable for errors contained herein or for incidental
consequential damages in connection with the furnishing,
performance, or use of this material.
Conner Peripherals, Inc. reserves the right to change,
without notification, the specifications contained in
this manual.
Copyright Conner Peripherals, Inc. No part of this
publication may be reproduced or translated into any
language in any form without the written permission of
Conner Peripherals, Inc.
IBM, PC/AT and PC/XT are registered trademarks of
International Business Machines Corporation.
Table of Contents
1.0 Scope of Manual
2.0 Key Features
3.0 Specification Summary
3.1 Capacity
3.2 Physical Configuration
3.3 Performance
3.4 Read/Write
3.5 Power Requirements (Typical)
3.6 Physical Characteristics
4.0 Environmental Characteristics
4.1 Ambient Temperature
4.2 Humidity
4.3 Altitude (relative to sea level)
4.4 Reliability and Maintenance
4.5 Shock and Vibration
4.6 Magnetic Field
4.7 Acoustic Noise
4.8 Safety Standards
5.0 Functional Description
5.1 Read/Write and Control Electronics
5.2 Drive Mechanism
5.3 Air Filtration System
5.4 Head Positioning Mechanism
5.5 Read/Write Heads and Disks
5.6 Error Correction
5.7 Customer Options
6.0 Electrical Interface
6.1 Power Connector
6.2 Diagnostic Routines
6.3 SCSI Termination
6.4 Spindle Synchronization
7.0 Recommended Mounting Configuration
8.0 SCSI Interface
8.1 SCSI Commands
8.2 Cable Requirements
8.3 Connector Requirements
8.4 Electrical Description
8.4.1 Output Characteristics
8.4.2 Input Characteristics
8.4.3 Terminator Power
1.0 Scope of Manual
This specification describes the key features,
specification summary, physical characteristics,
environmental characteristics, functional description,
electrical interface, recommended mounting configuration,
timing requirements, host address decoding, command
description, operations description, and error reporting
for the Conner Peripheral's model CP3100.
2.0 Key Features
The Conner Peripherals CP3100 is a 3.5 inch disk drive
which offers high performance and capacity
(104 megabytes) with low power consumption. It comes
equipped with an embedded industry standard controller.
Key features include:
o 1:1 Interleave
o Spindle Synchronization
o 32K Byte Read Look Ahead Buffer
o Embedded Servo
o Rotary Voice Coil Actuator
o Track Skewing
o Low Power Consumption
o Automatic Retries
3.0 Specification Summary
3.1 Capacity
104 Mbytes Formatted
3.2 Physical Configuration
Actuator Type Rotary Voice-coil
Number of Disks 4
Data Surfaces 8
Data Heads 8
Servo Embedded
Tracks per Surface 776
Track Density 1200 TPI
Track Capacity 16,896 bytes
Bytes per Block 512
Blocks per Drive 204,864
Blocks per Track 33
3.3 Performance:
Seek times
Track to Track: 8 ms
Average: 25 ms
Maximum: 45. ms
Rotation Speed (+0.1%) 3575 RPM
Data Transfer Rate 1.25 Mbyte/sec
Start Time
typical: 15 sec
maximum: 20 sec
Stop Time
typical: 15 sec
maximum: 20 sec
Interleave 1:1
Buffer Size 32K
The timing is measured through the interface with the drive
operating at nominal DC input voltages. The timing also
assumes that any I/O driver overhead and system hardware
dependency have been subtracted from timing measurements.
The average seek time is determined by averaging the seek
time for a minimum of 1000 seeks of random length over the
surface of the disk.
3.4 Read/Write
Interface SCSI
Recording Method RLL Code
Recording Density (ID) 23,441 BPI
Flux Density (ID) 15,627 RPI
3.5 Power Requirements (Typical)
+12V DC +5V DC Power
Read/Write Mode 270 ma 380 ma 5.2 W
Seek Mode 330 ma 350 ma 5.7 W
Ready Mode 240 ma 350 ma 4.7 W
Spin-up Mode 2.0 A 350 ma N/A
+12V DC: The maximum ripple allowed is 1% with equivalent
resistive load.
+5V DC: The maximum ripple allowed is 2% with equivalent
resistive load, without SCSI bus terminators installed.
Read/Write Mode: Occurs when data is being read from or
written to the disk.
Seek Mode: Occurs when the actuator is in motion.
Ready Mode: Occurs when the drive is not reading, writing,
or seeking. The spin motor is up to speed and a Drive Ready
condition exists. The actuator is residing on the last
accessed track.
Spin-up Mode: Current draw is for 7 seconds maximum.
3.6 Physical Characteristics
1.62" x 4.00" x 5.75" (with shock frame)
Weight 1.8 pounds
4.0 Environmental Characteristics
4.1 Temperature
Operating 5 deg C to 55 deg C
Non-operating -40 deg C to 60 deg C
Thermal Gradient 20 deg C P/h
4.2 Humidity
Operating 8% to 80% non-condensing
Non-operating 8% to 80% non-condensing
Maximum Wet Bulb 26 deg C P/h
4.3 Altitude (relative to sea level)
Operating 0 to 10,000 feet
Non-operating (max) 40,000 feet
4.4 Reliability and Maintenance
MTBF 50,000 hours (POH)1
MTTR 10 minutes typical
Maintenance None
Data Reliablity
<1 non-recoverable error in 1012 bits read
4.5 Shock and Vibration
Shock:
1/2 sine pulse, 11 msecond duration
Vibration:
Swept sine, 1 octave per minute
Non-operating shock
50 Gs, 10 ms
Non-operating vibration
5-62 Hz (1.2 oct/min)
0.020" double amplitude
63-400 Hz (1/2 oct/min)
4 Gs peak
Operating Shock
5 Gs (without non-recoverable errors)
Operating Vibration
5-22 Hz .010 inch displacement
(double amplitude)
23-500 Hz .25 Gs
(without non-recoverable error)
4.6 Magnetic Field
The disk drive will meet its specified performance while
operating in the presence of an externally produced
magnetic field under the following conditions:
Frequency Field Intensity
0 to 700 Khz 6 gauss maximum
700 Khz to 1.5 Mhz 1 gauss maximum
4.7 Acoustic Noise
The sound pressure level will not exceed 40 dBA at a
distance of 1 meter from the drive.
4.8 Safety Standards
The drive is designed to comply with relevant product
safety standards such as:
o UL 478, 5th edition, Standard for Safety of
Information Processing and Business Equipment, and
UL 1950, Standard for Safety of Information
Technology Equipment
o CSA 22.2 #154, Data Processing Equipment and
CSA 22.2 #220, Information Processing and Business
Equipment
CSA 22.2 #950, Safety of Information Technology Equipment
o IEC 435 Safety Requirements for Data Processing Equipment,
IEC 380, Safety of Electrically Energized Office Machines, and
IEC 950, Safety of Information Technology Equipment Including
Electrical Business Equipment
o VDE 0805 Equivalent to IEC 435,
VDE 0805 TIEL 100, Equivalent to IEC 950, and
VDE 0806, Equivalent to IEC 380
o TUV Essen
TUV Rheinland
5.0 Functional Description
The drive contains all necessary mechanical and electronic parts
to interpret control signals, position the recording heads over
the desired track, read and write data, and provide a contaminant
free environment for the heads and disks.
5.1 Read/Write and Control Electronics
One integrated circuit is mounted within the sealed enclosure in
close proximity to the read/write heads. Its function is to
provide head selection, read pre-amplification, and write drive
circuitry.
The single microprocessor-controlled circuit card provides the
remaining electronic functions which include:
o Read/Write Circuitry
o Rotary Actuator Control
o Interface Control
o Spin Speed Control
o Dynamic Braking
At power down the heads are automatically retracted to the inner
diameter of the disk and are latched and parked on a landing zone
that is inside the data tracks.
5.2 Drive Mechanism
A brushless DC direct drive motor rotates the spindle at 3575 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 and return the heads
to the landing zone when power is removed.
5.3 Air Filtration System
Within the sealed enclosure, a 0.3 micron filter provides a clean
environment to the heads and disks.
5.4 Head Positioning Mechanism
The read/write heads are supported by a mechanism coupled to a
voice coil actuator.
5.5 Read/Write Heads and Disks
Data is recorded on 95mm diameter disks through 3370 type heads.
5.6 Error Correction
The drive performs internal error correction. The six-byte
error correction polynomial is capable of correcting one error
burst with a maximum of 8 bits per 512 byte block.
5.7 Customer Options
There are three jumpers available for configuration; E1, E2,
and E3 are used to selects the drive's SCSI ID. The following
table defines the settings. E4 if jumpered will disable SCSI
parity. E5 if jumpered, enables spindle syncronization. E6 if
jumpered, enables the LED signal on J4 pins 1 and 2.
Jumper Options
SCSI ID E1 = 1
E2 = 2
E3 = 4
6.0 Electrical Interface
6.1 Power Connector
The drive has a four-pin DC power connector (J4) mounted
on the PCB. The recommended mating connector is Amp part
number 1-480424-0 utilizing AMP pins (part number 350078-4
or equivalent).
6.2 Diagnostic Routines
The microprocessor performs diagnostics upon application of power.
If an error is detected, the drive will not come ready.
6.3 SCSI Termination
There are three removable terminators: RP1, RP2, and RP3.
They can be removed from the drive if bus termination is
provided elsewhere in the system. If multiple devices are
installed on the cable, only the last device is terminated.
6.4 Spindle Synchronization
For use in Disk Arrays, a spindle synchronization feature is provided.
Spindle synchronization between drives is accomplished by connecting
a cable to J1 on each of the drives. Up to twelve disk drives may be
connected, and the method used to implement synchronization does not
require a designated master drive.
To construct the cable, a 2-conductor ribbon cable and 16-pin
displacement connector(Molex part number 15-47-3162 or equivalent)
are required. Install the required number of connectors on the
ribbon cable with the two conductors in pin positions 1-2
(pin positions 3-16 are unused).
To install the completed cable, connect the 16-pin displacement
connector to J1 of each drive. Align pin 1 of the connector with
pin 1 of J1.
7.0 Recommended Mounting Configuration
The CP3100 drive is designed to be used in applications where the
unit may experience shock and vibrations at greater levels than
larger and heavier disk drives.
The design features which allow greater shock tolerance are the
use of rugged heads and media, a dedicated landing zone, closed
loop servo positioning and specially designed motor and actuator
assemblies.
Ten base mounting points are provided to the customer. The drive
is mounted using 6-32 screws; 1/8" max. insertion for the sides,
and 1/4" max. insertion for the bottom. The system integrator
should allow ventilation to the drive to ensure reliable drive
operation over the operating temperature range. The drive may be
mounted in any attitude.
For additional vibration isolation, an external suspension system
may be used.
8.0 SCSI Interface
This section contains a brief summary of the SCSI Interface
implemented in the CP3100. For additional details regarding
the exact command description block format, please refer to
the Second Generation SCSI Interface Manual.
8.1 SCSI Commands
Format Unit 04H
Inquiry 12H
Mode Select 15H
Mode Sense 1AH
Read 08H
Read Buffer 3CH
Read Capacity 25H
Read Defect Data 37H
Read Extended 28H
Read Long 3EH
Reassign Blocks 07H
Release 17H
Request Sense 03H
Reserve 16H
Re-zero Unit 01H
Seek 0BH
Seek Extended 2BH
Send Diagnostic 1DH
Start/Stop Unit 1BH
Test Unit Ready 00H
Verify 2FH
Write 0AH
Write and Verify 2EH
Write Buffer 3BH
Write Extended 2AH
Write Long 3FH
8.2 Cable Requirements
A 50-conductor flat cable or 25-conductor twisted pair
cable is required. The maximum cable length is 6.0 meters
(19.68 ft.)
The cable impedance should be 132 ohm -+10% with a minimum
conductor size of 28 AWG.
8.3 Connector Requirements
The drive connector is a 50-conductor shrouded connector
which consists of two rows of 25 male pins on 100 mil centers.
The recommended mating connector is MOLEX part number 15-29-7950
or equivalent.
The pin assignments for this connector are shown in the following table:
Signal Pin
-DB(0) 2
-DB(1) 4
-DB(2) 6
-DB(3) 8
-DB(4) 10
-DB(5) 12
-DB(6) 14
-DB(7) 16
-DB(P) 18
GND 20
GND 22
GND 24
TERMPWR 26
GND 28
GND 30
-ATN 32
GND 34
-BSY 36
-ACK 38
-RST 40
-MSG 42
-SEL 44
-C/D 46
-REQ 48
-I/O 50
The minus sign (-) indicates active low.
All odd pins except pin 25 must be connected to ground.
Pin 25 is left open.
8.4 Electrical Description
The CP3100 drive uses open collector drivers. All assigned signals
are terminated with 220 ohms to +5 volts and 330 ohms to ground.
The termination resistors are removable for multi-device
configurations.
8.4.1 Output Characteristics
Each signal driven by the drive has the following output
characteristics when measured at the drive connector:
Signal Assertion 0.0VDC to 0.4 VDC
Min. Driver Output Cap. 48 ma (sinking) at 0.5 VDC
Signal Negation 2.5 VDC to 5.25 VDC
8.4.2 Input Characteristics
Each signal received by the drive must have the following
input characteristics when measured at the drive connector:
Signal Assertion 0.0VDC to 0.8 VDC
Maximum Total Input Load -0.4 ma at 0.4 VDC
Signal False 2.0 VDC to 5.25 VDC
8.4.3 Terminator Power
Terminator power (TERMPWR) is supplied through a diode to
prevent the back-flow of power to the drive. TERMPWR has
the following characteristics:
Supply Voltage 4.0VDC to 5.25 VDC
Min Source Drive Capability 800 ma
Maximum Sink Capability 1.0 ma sink capability with
a 1.0 amp fuse*
*Except for the purpose of providing power to an internal terminator.
