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cp3020.txt
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1992-04-28
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Conner Peripherals, Inc.
CP3020 Intelligent Disk Drive
Product Manual
Revision II
August, 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 Configuration
3.3 Performance
3.4 Read/Write
3.5 Power Requirements (Typical)
3.6 Physical Characteristics
4.0 Environmental Characteristics
4.1 Temperature
4.2 Humidity
4.3 Altitude (relative to sea level)
4.4 Reliability and Maintenance
4.5 Shock
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 Cabling
6.3 Diagnostic Routines
6.4 SCSI Termination
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
The manual lists the key features, specifications and
environmental characteristics of the disk drive.
It provides a functional description, along with
electrical interface data and the recommended mounting
configuration. Included is a list of the SCSI commands
supported by the drive.
2.0 Key Features
The Conner Peripherals CP3020 is a 3.5 inch low-profile
(1.00") disk drive which offers high performance with
low power consumption. Using the Small Computer System
Interface (SCSI), which is compatible with the Common
Command Set (CCS), the disk drive provides 20 Mbytes of
formatted storage.
Key features include:
o Low power requirements enabling battery operation
in portable environments
o High performance rotary voice coil actuator with
embedded servo system
o Two of seven run length limited code
o High shock resistance
o Internal air filtration system
o Sealed HDA
o Automatic actuator latch against inner stop upon
power down
o Microprocessor-controlled diagnostic routines that
are automatically executed at start-up
o Automatic error correction and retries
o Block size: 512 bytes
o 8K byte data buffer with look-ahead caching
o 1:1 Interleave
3.0 Specification Summary
3.1 Capacity
20 Mbytes Formatted
3.2 Configuration
Actuator Type Rotory Voice-Coil
Number of Disks 1
Data Surfaces 2
Data Heads 2
Servo Embedded
Tracks per Surface 636
Track Density 1150
Track Capacity (bytes) 16,896
Bytes per Block 512
Blocks per Drive 41,976
Blocks per Track 33
3.3 Performance
Seek:
Trk to Trk 8.0 ms
Average 27.0 ms
Max. 50.0
Rotation Speed 3575
Data Rate 1.25 Mbytes
Start Time:
Typical 5 sec
Maximum 10 sec
Stop Time:
Typical 5 sec
Maximum 10 sec
Interleave 3:1
Buffer Size 8K
The timing is measured through the interface with the drive
operating at nominal DC input voltages. The timing also
assumes that the 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.
Host system must allow a minimum of 60 seconds for drive
electronics to facilitate retries for a READY condition to
become active. One retry is equal to 25 seconds.
3.4 Read/Write
Interface SCSI
Recording Method 2/7 RLL
Recording Density 21,594 BPI
Flux Density 14,396 RPI
3.5 Power Requirements (Typical)
12V DC 5V DC* Power
R/W Mode 230 ma 275 ma 4.2 W
Seek Mode 140 ma 180 ma 2.8 W
Idle Mode 100 ma 160 ma 2.0 W
Standby Mode 1 ma 90 ma 0.5 W
Spin-up 700 ma 180 ma N/A
*Without SCSI 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.
Idle 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.
Standby Mode: Occurs when the motor is stopped, actuator
parked and all electronics except the interface
control is in sleep state. (Standby Mode can
be entered via the Stop Motor command.)
Spin-Up Mode: Occurs while the spindle motor is accelerating
from its rest state to its operational speed.
During the typical spin-up cycle, current on the
12 volt line may reach up to 1000 mA for up to
500 microseconds. The specified current is the
time averaged value over the spin-up cycle.
Maximum noise allowed (DC to 1 MHZ, with equivalent resistive
load: +12V DC: 1%, +5V DC: 2%.
3.6 Physical Characteristics
Dimensions:
1.00" x 4.00" x 5.75"
Weight:
1.1 lbs
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 10 deg C P/h max.
4.2 Humidity
Operating 8% to 80% Non-condensing
Non-operating 8% to 80 % Non-condensing
Max Wet Bulb 26 deg.C
4.3 Altitude (relative to sea level)
Operating -200 to 10,000 ft
Non-operating 40,000 ft
4.4 Reliability and Maintenance
MTBF 50,000 hrs. (POH)
MTTR 10 min
4.5 Shock
Non-operating 70Gs 10ms
Operating 5Gs 11ms
Without non-recoverable errors
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:
0 to 700Khz 6 gauss
700Khz to 1.5 Mhz 1 gauss
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 CP3040 disk 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.
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.
5.0 Functional Description
The CP3020 disk 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 selections, read preamplification, and write
data 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 balanced to provide minimal
mechanical runout to the disks and to reduce vibration of the HDA.
A dynamic brake is used to provide a fast stop to the spindle motor
when power is removed.
5.3 Air Filtration System
The head-disk assembly is a sealed enclosure with an integral 0.3
micron filter which maintains a clean environment for 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 95 mm diameter disks through 3370 type thin
film or composite metal in gap heads.
5.6 Error Correction
The CP3020 disk 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 four jumpers available for configuration. Three of
these jumpers, E1, E2, and E3, are used to select the drive's
SCSI ID, installing E4 disables parity.
Values:
E1 = 1
E2 = 2
E3 = 4
6.0 Electrical Interface
6.1 Power Connector
The drive has a 4-pin DC power connector (J3) 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 Cabling
Connect the SCSI interface cable to J2, Pin 1 is located next to
the 4 pin power connector. Bus termination is required on the
last device of the SCSI bus.
6.3 Diagnostic Routines
The microprocessor performs diagnostics upon application of power.
If an error is detected, the drive will not become ready.
6.4 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.
7.0 Recommended Mounting Configuration
The CP3020 drive is designed to be used in applications where the
units 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" maximum insertion for the sides,
and 1/4" maximum 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 CP3020. For additional details regarding the
exact command description block format, please refer to the Second
Generation SCSI Interface Manual.
8.1 SCSI Commands
This section briefly lists the SCSI commands that are supported by
the CP3020 disk drive:
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 characteristic impedance should be 132 ohms + or- 10%
with a minimum conductor size of 28 AWG.
8.3 Connector Requirements
The drive connector is a 50-conductor connector which consists
of two rows of 25 male pins on 100 mil centers.
The cable connector is a 50-conductor non-shielded connector
which consists of two rows of 25 female contacts on 100 mil
centers.
The pin assignments for this connector are shown in the
following table:
Signal* Pin**
-DB0 2
-DB1 4
-DB2 6
-DB3 8
-DB4 10
-DB5 12
-DB6 14
-DB7 16
-DBP 18
GND 20
GND 22
GND 24
TERM PWR 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 must be left open.
8.4 Electrical Description
The CP3020 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 0.0 VDC to 0.4 VDC
Min Driver Output Cap 48ma (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 0.0 VDC to 0.8 VDC
Max Total Input Load -0.4ma to 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 4.0 VDC to 5.25 VDC
Min Source Dr. Capability 800ma
Max Sink Capability 1.0ma with 1amp fuse*
*Except for the purpose of providing power to an internal terminator.