Conner CFP2105 series User manual

CFP2105 Series
Intelligent Disk Drive
Product Manual
October 1995
Pre-Release
Revision A
3081 Zanker Road
San Jose, CA 95134-2128
[phone]

FCC Notice This equipment generates and uses radio frequency energy and, if not installed
and used properly; that is, in strict accordance with the manufacturer's
instructions, may cause interference to radio and television reception. It has
been type tested and found to comply with the limits for a Class B computing
device in accordance with the specifications in Part 15 of FCC Rules, which are
designed to provide reasonable protection against such interference in a
residential installation. However, there is no guarantee that interference will
not occur in a particular installation. If this equipment does cause interference
to radio or television reception, which can be determined by turning the
equipment on and off, you are encouraged to try to correct the interference by
one or more of the following measures:
• Reorient the receiving antenna.
• Relocate the computer with respect to the receiver.
• Move the computer into a different outlet so that the computer and receiver
are on different branch circuits.
If necessary, you should consult the dealer or an experienced radio/television
technician for additional suggestions. You may find the following booklet
prepared by the Federal Communications Commission helpful:
How to Identify and Resolve Radio-TV Interference Problems
This booklet (Stock No. 004-000-00345-4) is available from the U.S. Government
Printing Office, Washington, DC 20402.
Warning: Changes or modifications made to this equipment which have not
been expressly approved by Conner Peripherals, Inc. may cause radio and
television interference problems that could void the user's authority to operate
the equipment.
Further, this equipment complies with the limits for a Class B digital apparatus
in accordance with Canadian Radio Interference Regulations.
Cet appareil numérique de la classe B est conforme au Règlement sur le
brouillage radioélectrique, C.R.C., ch. 1374.
Conner and the Conner logo are registered trademarks of Conner Peripherals,
Inc. All other trademarks mentioned in this manual are property of their
respective owners.
Copyright 1994, 1995, Conner Peripherals, Inc.
All rights reserved.
Document No. 501-072 10/95

Important Information About this Manual
All information contained in or disclosed by this document is considered
proprietary by Conner Peripherals, Inc. By accepting this material, the recipient
agrees that this material and the information contained therein are held in
confidence and in trust and will not be used, reproduced in whole or in part, nor
its contents revealed to others, except to meet the purpose for which it was
delivered. It is understood that no right is conveyed to reproduce or translate
any item herein disclosed without express written permission from Conner
Peripherals, Inc.
Conner Peripherals, Inc. provides this manual "as is," without warranty of any
kind, either expressed or implied, including, but not limited to, the implied
warranties of merchantability and fitness for a particular purpose. Conner
Peripherals, Inc. reserves the right to change, without notification, the
specifications contained in this manual.
Conner Peripherals, Inc. assumes no responsibility for the accuracy,
completeness, sufficiency, or usefulness of this manual, nor for any problem that
might arise from the use of the information in this manual.

Table of Contents Page i
Table of Contents
1. Overview of the Drives 1
What are the Drives? 1
Differences Between the Models 1
Features of the Drive 2
Drive Composition 3
Mechanical Design Features 3
Head Disk Assembly 4
Head Positioning Mechanism 5
Read/Write Heads and Disks 5
Data and Power Connections 5
Electrical Design Features 5
Integrated Circuit 5
Circuit Board 5
Firmware 6
2. Specifications 9
Specifications in this Chapter 9
Drive Capacity 10
Formatted Capacity* 10
Physical Configuration 10
Physical Configuration 10
Performance Characteristics 11
Seek Times (typical)* 11
Average Latency 11
Rotation Speed (+0.1%) 11
Controller Overhead 11
Start Time(Power Up)* 11
Stop Time at Power Down 11
Interleave 11
Read/Write Characteristics 12
Recording Method 12
Recording Density (maximum) 12
Flux Density (maximum) 12
Host Interface Characteristics 12
Command Set 12
Data Transfer Rate 12
Maximum Synchronous Transfer Offset: 12
Maximum Tagged Command Queue Depth: 12
Buffer Size: 12
Reliability 13
Data Reliability 13
Component Design Life 13
Start/Stop cycles 13
Mean Time Between Failures: 13
Preventive Maintenance 13
Power Requirements (Typical) 14
Minimum/Maximum Voltage: 14

Table of Contents Filepro CFP2105 Series
Page ii Filepro CFP2105 Series
Environmental Tolerances 15
Magnetic Field: 15
Acoustic Noise: 15
Safety Standards 16
Physical Characteristics - CFP2105E 17
Physical Characteristics - CFP2105S 18
Physical Characteristics - CFP2105W 19
3. Drive Operations 21
Functions of the Drive 21
Drive Operational Modes 21
Data Error Correction 22
Downloadable Microcode 22
Buffer Management and Command Execution 23
Read Look Ahead Code 23
Write Caching 25
Tagged Command Queuing 26
Seek Re-ordering 26
Buffer Management 26
4. Installing the Drive 27
Take These Precautions 27
Installing the Drive 27
Installing a CFP2105E 28
Setting the Drive's Jumpers - CFP2105E 28
Setting the SCSI Bus Address - CFP2105E 28
Disabling Spin-Up at Power On - CFP2105E 29
Delaying Spin Up at Power On - CFP2105E 29
Cabling the Drive - CFP2105E 29
Attaching Power to the Drive - CFP2105E 30
Mounting the Drive - CFP2105E 31
Mounting Screw Holes 31
Cooling 31
Installing a CFP2105S 32
Setting the Drive's Jumpers - CFP2105S 32
Setting the SCSI Bus Address - CFP2105S 33
Disabling Spin-Up at Power On - CFP2105S 34
Delaying Spin Up at Power On - CFP2105S 34
Disabling the SCSI Bus Parity - CFP2105S 35
Disabling SCSI Bus Terminator Power (TERMPWR) -
CFP2105S 35
Setting the Bus Termination - CFP2105S 36
Cabling the Drive - CFP2105S 37
SCSI Bus Cable 37
Spindle Synchronization 37
Attaching Power to the Drive - CFP2105S 38
Mounting the Drive - CFP2105S 38
Mounting Screw Holes 38
Cooling 38
Installing a CFP2105W 40
Setting the Drive’s Jumpers - CFP2105W 40
Setting the SCSI Bus Address - CFP2105W 41
Disabling Spin-Up at Power On - CFP2105W 42

Filepro CFP2105 Series Table of Contents
Technical Reference Manual Page iii
Delaying Spin Up at Power On - CFP2105W 42
Disabling the SCSI Bus Parity - CFP2105W 43
Disabling SCSI Bus Terminator Power (TERMPWR) -
CFP2105W 44
Using the J5 Auxiliary Connector 44
- SEL0 44
- XTFAULT 45
- SEL1 45
- VUNIQ 45
- SEL2 45
- SPSYNC 45
- SEL3 46
- XTACTV 46
- GROUND 46
+5 Volts 46
- FAULT 46
Setting the Bus Termination - CFP2105W 47
Cabling the Drive - CFP2105W 48
SCSI Bus Cable 48
Mixing Wide and Narrow SCSI Devices on a SCSI Bus 49
Spindle Synchronization Error! Bookmark not defined.
Attaching Power to the Drive - CFP2105W 47
Mounting the Drive - CFP2105W 47
Mounting Screw Holes 47
Cooling 47
5. Interface Physical Characteristics 49
Electrical Description 49
Output Characteristics 49
Input Characteristics 50
Model-Specific SCSI Physical Characteristics 50
CFP2105E (WIDE, 80-pin Single Connector Attachment [SCA]) 51
External Terminator Power 51
Internal Termination 51
Cable Requirements 51
Connector Requirements 51
Single Connector Attachment (SCA) Signal Definitions 51
Power 51
Spindle Sync 52
LED Out 52
Motor Start Controls 52
SCSI ID Selection 52
Interface Pin Assignments 53
Interface Timing Requirements 54
Model CFP2105S (Narrow, 50-pin SCSI) 55
External Terminator Power 55
Internal Termination 55
Cable Requirements 56
Connector Requirements 57
Interface Pin Assignments 58
Interface Timing Requirements 59
Model CFP2105W (Wide, Unitized SCSI-3 P-Connector) 60
External Terminator Power 60
Internal Termination 60

Table of Contents Filepro CFP2105 Series
Page iv Filepro CFP2105 Series
J5 Auxiliary Connector Signal Characteristics 61
Cable Requirements 61
Connector Requirements 62
Interface Pin Assignments 64
Interface Timing Requirements 65
6. SCSI Command Implementation 67
SCSI Command Summary 67
Drive Dependent SCSI Data Error! Bookmark not defined.
Format Drive Page - 03H68
Drive Geometry Page - 04H70
Notch and Partition Parameters Page - 0CH71

Technical Reference Manual Page 1
Overview of the Drives
1
What are the Drives?
The CFP2105 series is a family of high performance 3.5-inch low-profile (1.0 inch
high) 2.1GB (formatted) disk drives. They all offer 9.5 millisecond average seek
time for Reading , 10.5 millisecond seek time for Writing, with an average
latency of only 5.56 ms. High capacity is achieved by utilizing a zone density
recording technique using 15 recording zones at an areal density of 302 Mbits
per square inch. These drives feature high performance while maintaining low
power consumption to reduce power supply current and system cooling
requirements in disk arrays.
They are designed to operate on the Small Computer System Interface (SCSI)
and are SCSI-2/3 command compatible. The mechanical and major electronic
components are identical between the models and differ only in the host
interface implementation:
Drive Model Form Factor
Interface
Capacity
CFP2105E 1 inch high, 3.5 inch
80-pin Single Connector
FAST WIDE
2147 MB
CFP2105S 1 inch high, 3.5 inch
50-pin FAST
2147 MB
CFP2105W 1 inch high, 3.5 inch
68-pin FAST WIDE
2147 MB
For simplicity, we often refer to these drives collectively in this manual as “the
drive.”
Differences Between the Models
The three drive models differ only on the host interface implementation:
CFP2105E: SCSI 80-pin Wide Single Connector Attachment (SCA) interface
designed for applications such as Redundant Arrays in which the drives are
plugged directly into a backplane. The drive also implements a Wide SCSI
interface for high interface bandwidth.
CFP2105S: SCSI 50-pin standard interface designed for applications which
implement the standard SCSI-2 architecture.
CFP2105W: SCSI 68-pin Wide interface designed for applications which
require high interface bandwidth and the option of cabled interconnect. The
drive utilizes the Unitized Connector defined by the Small Form Factor
Committee (refer to SFF-8009). The Unitized Connector combines the SCSI-3 P-
connector Wide interface, the standard 4-pin power and a 2mm pin pitch
Auxiliary connector into a single molded assembly.

Chapter 1 Overview of the Drives
Page 2 Filepro CFP2105 Series
Features of the Drive
The drive provides the following features:
•512 KB segmentable cache buffer with adaptive cache management
•Least Recently Used (LRU) Cache replacement
•Automatic on-the-fly data error correction utilizing a 96-bit Reed-Solomon
EDAC.
•Independent 48-bit CRC miscorrection detection.
•On the fly header error detection and correction.
•High performance rotary voice coil actuator with embedded servo system
•No thermal recalibration required to maintain performance levels
•High Shock resistance
•Automatic actuator latch against the inner stop upon power down with
dedicated landing zone
•Active Termination with removable Resistor Packs
•Active Negation output drivers for greater interface reliability
•SCSI-2/3 Compatibility
•Dual Microprocessor-controlled diagnostic routines that automatically
execute at start-up
•Sealed HDA
•Down-loadable Code through SCSI Interface
•1,7 run length limited code
•Programmable Block Size (512 and 1024)
•Tagged Command Queuing with Seek Re-ordering and Write/Read
Coalescing

Overview of the Drives Chapter 1
Technical Reference Manual Page 3
Drive Composition
The drive is composed of mechanical, electrical, and firmware elements.
Mechanical Design Features
The drive’s hardware includes the components described in the following
sections. Figure 1-1 shows the drive top level assembly.
Figure 1-1
Drive Top Level Assembly
Head-Disk
Assembly
Printed Circuit
Board Assembly
Shield
Printed
Circuit
Board
Assembly
Damper
2105-1-1

Chapter 1 Overview of the Drives
Page 4 Filepro CFP2105 Series
Head Disk Assembly
The Head-Disk Assembly (HDA) consists of a die-cast aluminum base on which
is mounted a die-cast aluminum cover. Both the base and the cover are made
from a corrosion resistant aluminum alloy. A gasket seals the joint between the
base and cover to retard the entry of moisture and environmental contaminants.
The head-disk assembly, contains an integral 0.3 micron filter, which maintains
a clean environment. Critical drive components are contained within this
contaminant-free environment. Figure 1-2 shows the HDA and the major sub-
assemblies contained within it:
Figure 1-2
Head-Disk Assembly
Gasket
Top Cover
Filter
Disk Clamp
Disk (1 of 5)
Disk
Spacer (1 of 4)
Spindle Motor
Head-Stack
Assembly
Actuator
Magnet
Assembly
Base Assembly
Preamplifier/
Flex Circuit
Assembly
2107_1_2

Overview of the Drives Chapter 1
Technical Reference Manual Page 5
Drive Motor and Spindle
A brushless DC direct-drive motor assembly is mounted on the drive’s base. The
motor rotates the drive’s spindle at 5400 RPM. This 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.
Head Positioning Mechanism
The read/write heads are supported by a mechanism coupled to a rotary voice
coil actuator.
Read/Write Heads and Disks
Data is recorded on 95mm diameter disks through 3370-type 50% nano-slider
thin film heads with transverse pressure contour (TPC) air bearing surfaces.
The TPC air bearing surface allows the head to fly at a uniform height
regardless of radial position. This improves data reliability and allows the aerial
density to be more uniform with radius. The CFP2105 series contains five
sputtered thin film disks with ten data surfaces and ten read/write heads.
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.
Data and Power Connections
Data and power connections to the drive differ between the drive models. Refer
to chapter 4 for information regarding a specific model's requirements.
Electrical Design Features
Integrated Circuit
A single integrated circuit (IC) is mounted within the HDA in close proximity to
the read/write heads. The IC provides head selection, read pre-amplification,
and write drive circuitry.
Circuit Board
The drive’s dual-microprocessor-controlled circuit board provides the remaining
electronic functions, which include:
•read/write circuitry
•rotary actuator control
•interface control
•spin speed control
•auto-park
•power management

Chapter 1 Overview of the Drives
Page 6 Filepro CFP2105 Series
The background processor is a 16-bit Motorola 68HC16. The entire data path
between the serializer-deserializer and the interface chip, including the buffer
(cache) is 16 bits wide to provide high data throughput. The SCSI interface chip
manages a 16-bit to 8-bit conversion prior to transacting data over the SCSI bus
for 8-bit narrow SCSI applications.
The data buffer (cache) utilizes a 256K x 16 Dynamic RAM. Data path integrity
is ensured by using a 4-byte CRC which is appended to the data upon receipt by
the SCSI Interface Chip. This CRC is verified by the buffer manager when the
data is taken out of the buffer to be written to the disk and the CRC is written
with the data. A typical sector data field consists of 512 bytes of data, 4 bytes of
CRC and 18 bytes of Error Detection And Correction (EDAC) code. The same
CRC checks are performed during an outbound process and the CRC is stripped
from the data prior to sending it to the Host.
The SCSI interface functions are managed by a 8-bit Motorola 68HC11
microprocessor. Low SCSI transaction overhead is maintained by automating
common SCSI bus phase sequencing using a state machine in the SCSI Interface
Chip.
Read/Write Channel
The Read/Write channel, in addition to the preamplifier discussed earlier,
consists of three integrated circuits:
•Pulse Detector
•Data Separator
•Time base
Firmware
The drive’s firmware can be considered in two parts. The first part principally
resides in the ROM for the 68HC16 background processor. This processor is
responsible for:
•starting the spindle motor and maintaining precise rotational speed
•controlling track following and actuator motion during seeking
•managing background R/W activity
•power management
•monitoring the overall health of the drive.
The interface processor's control microcode resides in both ROM and RAM. The
RAM portion of the microcode can be upgraded in the field with using software.
Additional information regarding the RAM code can be found in Chapter 3, page
22. The interface processor firmware functions include:
•reporting drive status and error conditions to the host
•manage operating parameters for the drive
•parsing the Command Descriptor Block and checking for illegal fields
•converting the LBA to CHS and initiating read and write operations to the
background processor
•defect management

Overview of the Drives Chapter 1
Technical Reference Manual Page 7
•serial port communications
Since parsing/decoding of commands and execution of the Read/Write functions
are handled by separate processors, command execution can be overlapped in
multiple initiator or Tagged Command Queuing environments. Functions such
as seek re-ordering and command coalescing can also be overlapped when the
drive is operating with a host environment capable of supporting Tagged
Command Queuing.
For more information on the drive’s interface implementation and command set,
refer to the Eleventh Generation SCSI Interface Manual.

Chapter 1 Overview of the Drives
Page 8 Filepro CFP2105 Series

Technical Reference Manual Page 9
Specifications
2
Specifications in this Chapter
This chapter provides the following specifications for the drive:
•drive capacity
•physical configuration
•performance characteristics
•read/write characteristics
•reliability
•power requirements
•environmental tolerances
•safety standards
•physical characteristics

Chapter 2 Specifications
Page 10 Filepro CFP2105 Series
Drive Capacity
Formatted Capacity*
•CFP2105 Series: 2147 MB
*1MB is equal to 106or 1,000,000 bytes
Physical Configuration
Specification:
CPF2105 Series
Disk Type
Sputtered Thin film
Head Type
Thin Film - TPC
Actuator Type
Rotary Voice-Coil
Number of Disks
5
Data Surfaces
10
Data Heads
10
Servo
Embedded
Tracks per Surface
3948
Track Density @ 0°Skew
4030 TPI
Bytes per Block
512
Blocks per Drive (logical)
4,194,304
Physical Configuration
Data Rate
(Mbits/sec) Data Tracks per
Zone per Surface User Sectors per Track *
Zone 0 (OD) 68.7 362 139
Zone 1 65.1 433 132
Zone 2 62.7 271 127
Zone 3 60.6 244 122
Zone 4 57.9 307 119
Zone 5 54.7 356 111
Zone 6 53.5 175 108
Zone 7 50.9 228 103
Zone 8 48.5 254 99
Zone 9 45.5 266 92
Zone 10 43.0 222 87
Zone 11 41.1 166 83
Zone 12 37.1 360 79
Zone 13 35.1 182 71
Zone 14 (ID) 33.3 114 67
* The physical track configuration contains one spare sector per track.

Specifications Chapter 2
Technical Reference Manual Page 11
Performance Characteristics
Seek Times (typical)*
•Track to Track: 1.9 msec
•Average (read/write): 9.5/10.5 msec**
•Full Track: 21 msec
* The timing is measured from the time the last byte of the command descriptor block is
written to the time seek is initiated by the drive operating at nominal DC input
voltage and nominal operating temperature.
** 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.
Average Latency
•5.56 milliseconds
Rotation Speed (+0.1%)
•5400 RPM
Controller Overhead
•700µsec
Start Time(Power Up)*
•0 RPM to Ready
−Typical: 12 seconds
* This assumes 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.
Stop Time at Power Down
•Typical: 7 seconds
•Maximum: 10 seconds
Interleave
•1:1

Chapter 2 Specifications
Page 12 Filepro CFP2105 Series
Read/Write Characteristics
Recording Method
•1,7 RLL code
Recording Density (maximum)
•73,900 bits per inch
Flux Density (maximum)
•55,400 flux reversals per inch
Host Interface Characteristics
Command Set
•SCSI-2 (refer to the Eleventh Generation SCSI Technical Reference Manual
for command implementation)
Data Transfer Rate
•To/from Buffer, synchronous narrow: 10.0 MByte/second
•To/from Buffer, synchronous wide: 20.0 MByte/second
Maximum Synchronous Transfer Offset:
•15 bytes/words
Maximum Tagged Command Queue Depth:
•32 commands
Buffer Size:
•512 KB, segmentable