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Hard Drive: CMS: H40CQ285D-P 42MB 3.5"/HH IDE / AT

H 4 0 C Q 2 8 5 D - P    CMS
NO MORE PRODUCED                                      Native|  Translation
Form                 3.5"/HH               Cylinders     805|  980|     |
Capacity form/unform    42/      MB        Heads           4|    5|     |
Seek time   / track  29.0/ 5.0 ms          Sector/track   26|   17|     |
Controller           IDE / AT              Precompensation
Cache/Buffer             8 KB              Landing Zone
Data transfer rate    0.938 MB/S int       Bytes/Sector      512
                            MB/S ext
Recording method     RLL 2/7                        operating  | non-operating
Supply voltage     5/12 V       Temperature *C         5 55    |    -40 60
Power: sleep          0.4 W     Humidity     %         8 80    |      8 80
       standby        0.5 W     Altitude    km    -0.061  3.048|        12.192
       idle           2.5 W     Shock        g         5       |     75
       seek           3.6 W     Rotation   RPM      3600
       read/write     4.3 W     Acoustic   dBA        40
       spin-up            W     ECC        Bit   INTER.ERROR CORR.
                                MTBF         h      20000
                                Warranty Month        12
Lift/Lock/Park     YES          Certificates     CSA,IEC435,UL478,VDE



  |+-J1                                               Jumper|xx
  || |                                                Option|xx
  || | HDA                                                  |xx
  || |                                                      |XX I
  |+-+                                                      |XX N
  |                                                         |XX T
  |                                                         |XX E J2
  |                                                         |.X R
  |                                                         |XX F
  |                                                         |XX A
  |                                                         |XX C
  |                                                         |XX E
  |                                                         |XX
  |+-J4                                                     |
  || | LED Drive Capability                                 |XX J3
  |+-+ Serial IN/OUT                                        |XX Power

   Adapter Card Layout          J1
  |O                              oo           1          O |
  |                                E1                       |
  |                                   E2oo oooE4          O |
  |                                        E3               |
  |                                                         |
  |                                                         |
  |                                                         |
  |                                                         |
  |                                                         |
  |                                                         |
  |                                                         |
  |                                                       O |
  |                                                         |
  |                                                       O |
  +-------------+           ++                      +-------+



Jumper Settings

Jumper Option

       o o HSP
       o o C/D
       o o DSP
       o o ACT

There are four jumper options available for configuration, - HSP,
-C/D, -DSP, and -ACT.

-HSP, when jumpered connects a ground to -HOST
SLV/ACT signal on the interface for those systems that require the
slave drive to provide -SLAVE PRESENT signal from the slave drive to
a two drive system.

-C/D is the address jumper. When jumpered, the master or C drive is

-DSP, when jumpered, indicates to the drive that a slave is present,
In a two drive system, this jumper option must be installed in the
master, or C drive.

The last jumper, -ACT, connects the active signal to the -HOST SLV/
ACT signal on the interface. This signal provides the capability to
drive an external LED. An external current limiting resistor is

 There is another way to connect the drive LED. J4, pins 1 and 2,
 provide both an open collector drive signal and a current limiting
 resistor connectrd on the other end to +5V.

The following table shows what the jumper settings should be various
system configurations.

   | Jumper        | 1 Drive  | 2 Drive   | 2 Drive  |
   | Configuration |          | Master    | Slave    |
   | -ACT          | CLOSED   | Note 1    | Note 1   |
   | -C/D          | CLOSED   | CLOSED    | OPEN     |
   | -HSP          | OPEN     | OPEN      | Note 2   |
   | -DSP          | OPEN     | CLOSED    | OPEN     |

Note 1.
In a two drive system, it is possible to drive one LED with both
drives. An external current limiting resistor is required. The -ACT
and -HSP signals both connect to pin 39, -HOST SLV/ACT. They are
therefore mutually exclusive.

Note 2.
If the disk drive is connected to some drive that requires that the
signal, -DRIVE SLAVE PRESENT be supplied from the slave drive via the
interface signal -HOST SLV/ACT, then this jumper must be installed.
If this jumper is installed, the -ACT jumper must not be installed
because the two jumpers are mutually exclusive.

 J3   DC Power and pin connector assignments
 ++/-----J3-----\++ pin 1    +12 VDC
 ++| 4  3  2  1 |++ pin 2    GND
 | +------------+ | pin 3    GND
 +----------------+ pin 4    + 5 VDC



Notes on installation

Installation direction

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

The drive may be mounted in any attitude!

Recommended Mounting Configuration
The disk 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 features which allow greater shock tolerance are the use
of rugged media and shock mounts. To take full advantage of the shock
mounts, it is necessary to provide a minimum of 0.1 inch clearance
on both the top and sides of the drive. This clearance allows for
movement of the drive during acceleration.

Mechanically Isolated Mounting Points
Ten base mounting points are provided to the customer. Each mounting
point is mechanically isolated from the head/disk assembly. 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 ventila-
tion to the drive to ensure reliable drive operation over the opera-
ting temperature range.

Physical Description
The user interface is a 40 conductor cable with Molex p/n 15-47-3401
female header or equivalent. The interface allows up to two drives to
be daisy chained together. The maximum cable length is two feet.

The disk drive connector is a 40 conductor connector which consists
of two rows of 20 male pins on 100 mil centers. The header part
number is Molex p/n 7723 40A587, or equivalent.

Signal Levels
All signal levels are TTL compatible. A logic "1" is > 2.0 Volts. A
logic "0" is from 0.00 Volts to 0.70 Volts.

Air Filtration System
Within the sealed enclosure, a 0.3 micro filter provides a clean
environment to the heads and disks.

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.

Connect the power cable to J3. Connect the Task File interface cable
to J2.

Drive Mechanism
A brushless DC direct drive motor rotates the spindle at 3600 RPM.
The motor/spindle assembly is dynamically balanced to provide a
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.

 Installation of the Drive and Adapter Card
  1. Pick a device type that is equal to or less than the CP344 in
     capacity and update the PC's CMOS drivers.

2. Remove power to the computer

  3. If another hard disk controller is installed, it is necessary to
     prevent it from responding to the addresses 1F0-7H and 3F6-7H.
     It is also necessary to ensure that the controller is
     electrically disconnected or tri-stated from IRQ14 of the mother-
     board bus. This may be done either by removing the board, by
     electrically disconnecting the signal from the interface, or by
     setting the jumpers of the board to select the alternate address
     for the hard disk.

4. Insert the board into any available card slot.

  5. Configure the Host adapter for the correct configuration of your
     computer BIOS.

     Adapter Card Jumpers   E1 and E3 always not installed
                            E2 and E4 always installed

     Note: E3 and E4 are located in a straight line with a pin between
           them, as shown below. Jumper in refers to the pin jumpered
           to the center pin.

                        E3     E4
                         o  o  o

6. Connect power to the Disk Drive.

  7. Run the DOS FDISK program (or equivalent) to establish DOS

     Note: DOS 3.2 and below have limitations of 32 megabytes unless
           software utility is used to overcome this.

  8. Run the DOS format program by typing "Format C:/S". The volume
     may be named with the addition of the "/V". The format will be
     completed and the system transferred if the "/S" option was used.
     The system will ask for a volume name if the "/V" option is used.

9. Files can then be copied to the C: drive from the floppy.

 10. When the system is rebooted, the system should boot from the hard
     drive (Drive C:) if the floppy is removed.



Key Features
The CP344 is a high performance 3.5 inch 21.4 megabyte (formatted)
disk drive designed to operate on IBM PC/AT or equivalent in either
native or translate mode. The CP344 also features low power require-
ments enabling battery operation in portable environments.

Because the drive contains the Task File within its control logic, it
requires a simplified adapter board to operate. Conner Peripherals
has developed an adapter board to be used in conjunction with the
drive on an AT or equivalent system.

 - The CP344 features low power requirements, enabling battery opera-
   tion in portable environments

- 1 : 1 Interleave

- 8K Buffer

- Read Lock-Ahead Capability

 - High performance rotary voice coil actuator with embedded servo

- Two of seven run length limited code

- Sealed HDA

- Internal air filtration

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

- Automatic error correction and retries

- Block size 512 bytes

- Emulates Task File and supports additional commands

- Up to two drives may be daisy-chained on this interface

- Translate mode (17 sectors, 5 heads, 980 cylinders) is supported

Seek Times

       |Physical track to track      max. |  10 ms |
       |               Average msec. max. |  29    |
       |               Average msec. max. |  50    |
       |Latency                msec. avg. |   8.33 |
       Average seek time is determined by dividing the total time
       required to seek between all possible ordered pairs of track
       addresses, by the total number of these ordered pairs.

Functional Description
The CP344 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.

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 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 (or the start of STANDBY MODE) the heads are auto-
matically retracted to the inner diameter of the disk and are latched
and parked on a landing zone that is inside the data tracks.

Read/Write Heads and Disks
Data is recorded on 95mm diameter disk through 3370 type heads.

Error Correction
The disk 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                     20,000 hours POH (population is min. of 100
 MTTR                     5 minutes typical
 Preventive Maintenance   None
 Component Design Life    5 years

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

- UL 478 Electronic Data Processing Units and Systems

- CSA C22.2 No.154, Data Processing Equipment

 - VDE 0804 Regulations for Telecommunications Apparatuses including
   Information Processing Equipment

- IEC 435 Safety Requirements for Data Processing Equipment

Write Precompensation
An 8 bit register used in previous disk drives to define the cylinder
at which precompensation would begin. This register is used for other
purposes in the CP344.

Conner drives are different from previous ST506 type drives in that
they do not require a low level format. This low level format is done
in the factory as part of the extebded burn in process and it not
possible to do via the Host interface, therfore to put a drive on a
system, it is only necessary to FDISK and then do a system FORMAT.

Evaluation Adapter Board
In order to facilitate evaluation and aid those manufacturers
interested in quickly getting the disk drive running, Conner
Peripherals has developed an adapter board to be used in conjunction
with the drive on an AT or equivalent system. The drive requires no
special driver program as it works with the existing AT Bios or
equivalent. It is hoped that the interface will be incorporated into
the motherboard of the AT device or on some other multi-function
adapter. The artwork and Bill of Materials are available upon re-

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