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Hard Drive: CONNER: CP-2020 21MB 2.5"/SSL SCSI1 SE




C P - 2 0 2 0    CONNER
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 2.5"/SUPERSLIMLINE    Cylinders     643|     |     |
Capacity form/unform    21/      MB        Heads           2|     |     |
Seek time   / track  23.0/ 5.0 ms          Sector/track   32|     |     |
Controller           SCSI1 SINGLE-ENDED    Precompensation
Cache/Buffer             8 KB LOOK-AHEAD   Landing Zone
Data transfer rate    1.250 MB/S int       Bytes/Sector      512
                      3.000 MB/S ext SYNC
Recording method     RLL 2/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5 V          Temperature *C         5 55    |    -40 60
Power: sleep          0.3 W     Humidity     %         8 80    |      8 80
       standby        0.5 W     Altitude    km    -0.061  3.050|        12.200
       idle           1.5 W     Shock        g        10       |    100
       seek           3.0 W     Rotation   RPM      3433
       read/write     3.0 W     Acoustic   dBA        34
       spin-up            W     ECC        Bit   64
                                MTBF         h     100000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     CSA,IEC380,IEC435,IEC950,U...

Layout

CONNER CP2020 PRODUCT MANUAL P/N 00501-004 REV. I, SEPTEMBER 1990

  +---------------------------------------------------------+
  |                                                         |
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX J2
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         1XX
  |  E1   E2 E3                                             |xx
  |   *    * *                                              |xx J3
  |   *    * *                                              1
  +---------------------------------------------------------+

Jumpers

CONNER CP2020 PRODUCT MANUAL P/N 00501-004 REV. I, SEPTEMBER 1990

Jumper Setting
==============

 Connector Pin Assignments
 -------------------------
  +----------------+----+
  | Drive          +----+
  |                +----+
  | RSVD ------- 1 |1  o| 2 ----- RSVD
  | RSVD ------- 3 |o  o| 4 ----- RSVD         J3
  | E1   ------- 5 |o  o| 6 ----- E2
  | E3   ------- 7 |o  o| 8 ----- -LED
  | NC   ----- KEY |o  o| KEY --- NC
  | +5V LOGIC -- 1 |1  o| 2 ----- +5V LOGIC
  | +5V RET ---- 3 |o  o| 4 ----- +5V RET
  | GND  ------- 5 |o  o| 6 ----- -DB0
  | GND  ------- 7 |o  o| 8 ----- -DB1
  | GND  ------- 9 |o  o| 10 ---- -DB2
  | GND  ------ 11 |o  o| 12 ---- -DB3         J2
  | GND  ------ 13 |o  o| 14 ---- -DB4
  | GND  ------ 15 |o  o| 16 ---- -DB5
  | (KEY) NC -- 17 |o  o| 18 ---- -DB6
  | GND  ------ 19 |o  o| 20 ---- -DB7
  | GND  ------ 21 |o  o| 22 ---- -DBP
  | GND  ------ 23 |o  o| 24 ---- TERM PWR
  | -ATN ------ 25 |o  o| 26 ---- -BSY
  | GND  ------ 27 |o  o| 28 ---- -ACK
  | -RST ------ 29 |o  o| 30 ---- -MSG
  | GND  ------ 31 |o  o| 32 ---- -SEL
  | -I/O ------ 33 |o  o| 34 ---- -C/D
  | GND  ------ 35 |o  o| 36 ---- -REQ
  | +5V RET --- 37 |o  o| 38 ---- +5V RET
  | +5V MOTOR - 39 |o  o| 40 ---- +5V MOTOR
  |                +----+
  |                +----+
  +----------------+----+

 SCSI ID Jumpers
 ---------------
  +--------------+----------+--------+--------+
  | Drive Select |   E1     |  E2    |  E3    |
  +--------------+----------+--------+--------+
  |     0        |  OPEN    | OPEN   | OPEN   |
  |     1        |  CLOSED  | OPEN   | OPEN   |
  |     2        |  OPEN    | CLOSED | OPEN   |
  |     3        |  CLOSED  | CLOSED | OPEN   |
  |     4        |  OPEN    | OPEN   | CLOSED |
  |     5        |  CLOSED  | OPEN   | CLOSED |
  |     6        |  OPEN    | CLOSED | CLOSED |
  |     7        |  CLOSED  | CLOSED | CLOSED |
  +--------------+----------+--------+--------+
 In addition, E1, E2 and E3 are supplied to Interface connector J3 for
 external SCSI ID selection.

 An external light emitting diode (LED) may be attached to the drive.
 The customer must supply the LED, a current limiting resistor (RCL)
 and a +5 Volt power source. The connection to the drive is made as
 follows:
                           -+---++     +---+
    J3-8 (-LED) ------------+LED+------+RCL+--------> +5V DC
                            +---+      +---+

Install

CONNER CP2020 PRODUCT MANUAL P/N 00501-004 REV. I, SEPTEMBER 1990

Notes on installation
=====================

Installation direction
----------------------

     horizontally                           vertically
   +-----------------+             +--+                       +--+
   |                 |             |  +-----+           +-----+  |
   |                 |             |  |     |           |     |  |
 +-+-----------------+-+           |  |     |           |     |  |
 +---------------------+           |  |     |           |     |  |
                                   |  |     |           |     |  |
                                   |  |     |           |     |  |
 +---------------------+           |  +-----+           +-----+  |
 +-+-----------------+-+           +--+                       +--+
   |                 |
   |                 |
   +-----------------+

Installation direction
----------------------
The drive may be mounted in any attitude!

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.

Eight (8) mounting points are provided to the customer, four bottom
mounts and four side mounts. The drive is mounted on the bottom by
using 4-40 screws, 0.19" maximum insertion. The side mounting screws
are 2.5 mm metric, 0.25" maximum insertion. 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.

Cable Requirements
------------------
A 40-conductor cable no more than 18" in length with at least 28 AWG
wire size and a characteristic impedance of 90 to 140 ohms (132 ohms
nominal) is required. A 50-conductor cable may be used to connect to
both the drive connector (J2) and the option connector (J3).

Connector Requirements
----------------------
The drive connector (J2) is a 40-position header which consists of 2
row of 20 male pins on 2mm centers. The option connector (J3) is an
8-position header which consists of 2 rows of 4 male pins on 2mm
centers.

 Electrical Description
 ----------------------
 The drive uses open collector drivers. All assigned aignals are
 terminated with 1K ohm to +5 volts to the drive through the TERMPWR
 line (J2-24). The termination resistors are not removable.

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

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
Maximum Total Input Load -0.4 ma at 0.4 VDC
Signal False 2.0 VDC to 5.25 VDC

 Magnetic Field
 --------------
 The disk drive will meet its specified performance while operating in
 the presense of an externally produced magnetic field under the
 following conditions.
   +------------------+------------------+
   |Frequency         |   Field Intensity|
   +------------------+------------------+
   |   0 to 1.5 Mhz   |   6 gauss maximum|
   |   1.5 Mhz        |   1 gauss maximum|
   +------------------+------------------+

Cabling
-------
Connector J2 carries the SCSI interface signals and the power
connections required to operate the drive. Connector J3 carries
optional signals for external SCSI ID configuration and LED
illumination.

 SCSI Termination
 ----------------
 The drive uses 1k ohm pull up resistors on all eighteen SCSI bus
 signals. These resistors are supplied +5V from the initiator on the
 TERMPWR line at J2-24.

SCSI Bus Attachment
-------------------
A single CP2020 drive may be daisy-chained with other SCSI targets on
a SCSI Bus if the drive is the last physical unit on the Bus and the
cable length specification i snot exceeded.

Two or more CP2020 drives CANNOT be daisy-chained on a SCSI Bus as
both drives contain termination resistors. This may result
reflections on the cable which can cause communication errors between
the initiator and the targets on the SCSI Bus.

SCSI Bus
--------
The SCSI bus can have up to eight devices sharing the bus; however,
communication is allowed between only two devices at any given time.
Each SCSI device has a SCSI ID bit assigned to it as shown below.

     SCSI ID Bits
  SCSI ID  Data Bus
     0      DB(0)
     1      DB(1)
     2      DB(2)
     3      DB(3)
     4      DB(4)
     5      DB(5)
     6      DB(6)
     7      DB(7)

When two SCSI devices communicate on the bus, one acts as an
initiator and the other acts as a target. The initiator originates
the operation and the target performs the operation. The drive
assumes a fixed role as a target.

Features

CONNER CP2020 PRODUCT MANUAL P/N 00501-004 REV. I, SEPTEMBER 1990

Key Features
------------
The CP2020 is a high performance 2.5 inch low-profile (0.69")
21.7 megabyte (formatted) disk drive with 23ms average seek time
which is designed with the SCSI interface. The drives feature a low
5V power requirement and high shock resistance, enabling battery
operation in portable environments.

- 2.5" Form factor

- Single 5 Volt supply

- Low power requirements

- 6.0 oz unit weight

 - High performance rotary voice coil actuator with embedded servo
   system.

- Single connector for power & interface

- Run length limited code (2/7)

- High shock resistance

- Internal air filtration system

- Sealed HDA

- Automatic actuator latch against inner stop upon power down

 - Microprocessor-controlled diagnostics routines that are auto-
   matically executed at start-up.

- Automatic error correction and retries

- Block size 512 bytes

- SCSI Interface

- 1:1 Interleave

- Look Ahead Read Capability

- 8K Buffer

Seek Times
----------

       +----------------------------------+--------+
       |Physical track to track      max. |   5 ms |
       +----------------------------------+--------+
       | AT INTERFACE  Average msec.      |  23    |
       |               Average msec. max. |  40    |
       +----------------------------------+--------+
       |Latency                msec. avg. |   8.7  |
       +----------------------------------+--------+
       The timing is measured through the interface with the drive
       operating at nominal DC input voltages.

       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.

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
one of two head selection, read preamplification, and write drive
circuitry.

The single microprocessor controlled circuit card provides the
remaining electronic functions which include:

        - Read/Write Circuitry
        - Rotary Actuator Control
        - Interface Control
        - Spin Speed Control
        - Dynamic Braking
        - Power Management

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.

Drive Mechanism
---------------
A brushless DC direct drive motor rotates the spindle at 3433 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.

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.

Head Positioning Mechanism
--------------------------
The two read/write heads are supported by a mechanism coupled to the
voice coil actuator.

Read/Write Heads and Disks
--------------------------
Data are recorded on 65mm diameter disk through two miniature
miniature thin film heads.

Error Correction
----------------
The CP2020 performs internal error correction. The error correction
polynominal is capable of correcting one error burst with a maximum
of 8 bits per 512 byte block.

 Reliability and Maintenance
 ---------------------------
 MTBF                     100,000 hours POH (population is min. of 100
                          units)
 MTTR                     10 minutes typical
 Preventive Maintenance   None
 Component Design Life    5 years

Safety Standard
---------------
The CP2020 disk drive is designed to comply with relevant product
safety standards such as:

 - UL 478, 5th edition, Standard for Safety of Information Processing
   and Business Equipment, and UL 1950, Standard for Safety of
   Information Technology Equipment

 - CSA 22.2#154, Data Processing Equipment and CSA 22.2#220,
   Information Processing and Business Equipment

 - IEC 435 Saftey 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

 - VDE 0805 Equivalent to IEC 435,
   VDE 0805 TIEL 100, Equivalent to IEC 950, and VDE 0806, Equivalent
   to IEC 380













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