Conner Peripherals, Inc.
SUMMIT SCSI
Intelligent Disk Drives
Product Manual
Revision II.3
January, 1992
3081 Zanker Road
San Jose, CA 95134-2128
(408) 456-4500
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 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 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
5.7.1 SCSI Bus Address
5.7.2 Delay Spin
5.7.3 SCSI Parity
5.7.4 SCSI Termination
6.0 Power Connector
7.0 Recommended Mounting Configuration
8.0 SCSI Interface
8.1 SCSI Commands
8.2 Cable Requirements
8.3 Connector Requirements
8.3.1 SCSI Signals and Pin Assignments
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, and error reporting for
the Conner Peripheral's model CP3540.
2.0 Key Features
The CP3540 is a high performance 3.5 inch half
height (1.625 inch) 540 megabyte (formatted)
disk drives with 12 ms average seek time. It is
designed to operate on the Small Computer System
Interface (SCSI) and is SCSI-2 compatible. The
drive features high performance, high reliability,
fast access to data and high data throughput.
The drive offer high performance while maintaining
low power consumption to reduce power supply current
and system cooling requirements in disk arrays.
Typical applications for this drive is workstations,
file servers, multiuser systems and disk arrays.
o Automatic Spindle Synchronization
o 256K Byte Segmentable Look-Ahead Read
Buffer
o LRU Caching Algorithm
o 88 Bit Reed-Solomon EDAC with single burst
on-the-fly error correction
o LRC on data from interface to disk
o SCSI-2 Compatibility
o Sealed HDA with internal air filtration
system.
o Executes microprocessor-controlled
diagnostic routines automatically at
start- up.
o Track skewing
3. 0 Specification Summary
3.1 Capacity
Formatted Mbytes 543.7
3.2 Physical Configuration
Disk Type Thin film
Actuator Rotary Voice-Coil
Number of Disks 6
Data Surfaces 12
Data Heads 12
Servo Embedded
Tracks per Surface 1807
Track Density 2150 TPI
Formatted Track Capacity
(bytes) 25,088
Bytes per Block 512
Blocks per Drive 1,061,928
Sectors per Track 49
3.3 Performance
Seek Times1
Track to Track: 3.0 ms
Average: 12.0ms2
Maximum: 30.0ms
Average Latency 6.7 ms
Rotation Speed (+0.1%) 4498 RPM
Data Transfer Rate 2.5 Mbyte/second
(synchronous) 5.0 Mbyte/second
Start Time(Power Up)3
typical: 15 seconds
maximum: 20 seconds
Stop Time (Power Down)typical: 15 seconds
maximum: 20 seconds
Interleave 1:1
Buffer Size 256KB segmentable up to 8 partitions
1 The timing is measured through the
interface with the drive operating at
nominal DC input voltages.
2 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 These numbers assume spin recovery is not
invoked. If spin recovery is invoked, the
maximum could be 40 seconds. Briefly
removing power can lead to spin recovery
being invoked.
3.4 Read/Write
Interface: SCSI (CCS)
Recording Method: 2 of 7 RLL code
Recording Density (ID): 44,325 bits per inch
Flux Density (ID): 29,550 flux reversals per inch
3.5 Power Requirements1 (Typical)
+12V DC +5V DC Power
Read/Write Mode 520 ma 215 ma 7.3 W
Seek Mode 715 ma 210 ma 9.6 W
Idle Mode 470 ma 210 ma 6.7 W
Spin-up Mode 3.0 amps 275ma n/a
Read/Write Mode occurs when data is being read
from or written to the disk.
Seek Mode occurs while the actuator is in motion.
Idle Mode occurs when the drive is not reading,
writing or seeking. The motor is up to speed and
DRIVE READY condition exists. Actuator is residing
on last accessed track.
Spin-Up Mode current draw is for 7 seconds
maximum.
Maximum noise allowed (DC to 1 MHZ, with
equivalent resistive load): +5V DC: 2%.
1 Without terminators installed.
2 The maximum ripple allowed is 1% with equivalent
resistive load.
3The maximum ripple allowed is 2% with equivalent
resistive load.
3.6 Physical Characteristics
Outline Dimensions (inches)
1.625" x 4.000" x 5.75"
Weight
2.2 pounds
4.0 Environmental Characteristics
4.1 Temperature
Operating 5øC to 55øC
Non-operating -40øC to 60øC
Thermal Gradient 20øC per hour maximum
4.2 Humidity
Operating 8% to 80% non-condensing
Non-operating 8% to 80% non-condensing
Maximum Wet Bulb 26øC
4.3 Altitude (relative to sea level)
Operating -200 to 10,000 feet
Non-operating (maximum) 40,000 feet
4.4 Reliability And Maintenance
MTBF 150,000 hours (POH)
MTTR 10 minutes typical
Preventive Maintenance None
Component Design Life 5 years
Data Reliablity <1 non-recoverable error in
1013 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 G's
Non-operating vibration:
5-62 HZ (1/2 oct/min) 0.020 inch double
amplitude
63-500 Hz (1/2 oct/min) 4 G's peak
Operating Shock: 5 G's (without non-recoverable
errors)
Operating Vibration:
5-22 Hz
0.010 inch displacement (double amplitude)
23-500 Hz 0.5 G's (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 700Khz 6 gauss maximum
700Khz to 1.5Mhz 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
Conner Peripherals disk drives are 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 and
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 and
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 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. 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
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 rotary voice coil actuator.
5.5 Read/Write Heads and Disks
Data is recorded on 95mm diameter disks through
3370 type thin film heads.
5.6 Error Correction
The Error Detection and Correction Code (EDAC)
implementation in this generation of Conner disk
drives is a Reed Solomon code with single burst on-
the-fly correction capability. The code will
correct any single burst of up to 11-bits in
length on-the-fly. The code will correct two
error bursts of up to 11-bits in length in
firmware and detect three error bursts of up to 11-
bits in length. The single burst detection
capability of the code is 51-bits.
5.7 Customer Options
5.7.1 SCSI Bus Address
There are three jumpers available for
configuration of SCSI ID: E1, E2, and E3. The
following table defines the settings:
Jumper Options
E1 E2 E3 SCSI ID
Out Out Out 0
In Out Out 1
Out In Out 2
In In Out 3
Out Out In 4
In Out In 5
Out In In 6
In In In 7
5.7.2 Delay Spin
A jumper in the E4 location, disables spin up on
power-on. Disabling spin up on application of
power can also be enabled by setting the DSPN bit
in MODE SELECT page 0.
E4 DSPN Result
In 0 Spin Disabled
In 1 Spin Disabled
Out 0 Spin up on Power On
Out 1 Spin Disabled
5.7.3 SCSI Parity
SCSI parity is always enabled in both directions.
5.7.4 SCSI Termination
Three removable resistor packs located behind the
50-pin SCSI interface connector provide SCSI bus
termination. Terminator power (TERMPWR) output on
pin 26 can be disabled by removing the jumper in
location E5 which is located behind the 50-pin
SCSI Interface ccnnector.
6.0 Power Connector
The drive has a 4-pin DC power connector mounted
on the PCB. The recommended mating connector is
AMP part number 1-480424-0 utilizing AMP pins,
part number 350078-4 or equivalent.
7.0 Recommended Mounting Configuration
The 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 x 1/8"
max. insertion for the sides, and 1/4" 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.
The system integrator should also allow o.060
inches (1.6mm) of free space and on each side of
the drive for head-disk-assembly (HDA) sway space
if the drive is expected to need operating shock
specifications. If the disk drive is mounted from
sides, the mounting provisions should clear the
baseplate of the HDA.
8.0 SCSI Interface
This section contains a brief summary of the SCSI
Interface implemented in the CP3540. For additional
details regarding command descriptions, please refer
to the Fifth Generation SCSI Interface Manual.
8.1 SCSI Commands
Following is a list of commands that the drive
supports:
Format Unit 04H
Inquiry 12H
Mode Select 15H
Mode Sense 1AH
Read (6) 08H
Read (10) 28H
Read Buffer 3CH
Read Capacity 25H
Read Defect Data 37H
Read Long 3EH
Reassign Blocks 07H
Release 17H
Request Sense 03H
Reserve 16H
Re-zero Unit 01H
Seek (6) 0BH
Seek Extended (10) 2BH
Send Diagnostic 1DH
Start/Stop Unit 1BH
Test Unit Ready 00H
Verify 2FH
Write (6) 0AH
Write Extended (10) 2AH
Write and Verify 2EH
Write Buffer 3BH
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 ñ 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.
8.3.1 SCSI Signals and Pin Assignments
Signal Pin No.
-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 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
Minimum driver output capability: 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: 0.0 VDC to 0.8 VDC
Minimum total input load: -0.4 ma (sinking) 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 4.0 VDC to 5.25 VDC
Minimum source capability: 800 ma
Minimum sink capability: 1.0 ma sink capability
(except for the purpose of providing power to an
interminator) with a 1.0 amp fuse.
