
W R E N   V   9 4 1 8 6 - 3 8 3    IMPRIMIS
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders    1412|     |     |
Capacity form/unform   338/  383 MB        Heads          13|     |     |
Seek time   / track  14.5/ 3.0 ms          Sector/track   34|     |     |
Controller           ESDI                  Precompensation
Cache/Buffer               KB              Landing Zone
Data transfer rate    1.250 MB/S int       Bytes/Sector      512
                            MB/S ext
Recording method     RLL 2/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C        10 50    |    -40 70
Power: sleep              W     Humidity     %         8 80    |      5 95
       standby            W     Altitude    km    -0.305  3.048| -0.305 12.210
       idle               W     Shock        g         2       |     32
       seek          30.0 W     Rotation   RPM      3600
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit
                                MTBF         h     100000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     CSA,FCC,IEC380,IEC435,UL47...


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SEAGATE  ST4383E/ST4384E/ST4442E  PRODUCT MANUAL 77765300-K

  +--------------------------------------------------------+
  |                                                        |XX J4
  |                                                        |XX Data
  |                                                        |XX Cable
  |                                                        |XX
  |                                                1-+J9   |XX
  |                                                | |     |
  |                                                +-+     |XX
  |                                      Terminator+-+     |XX J3
  |                                      Resistor  | |     |XX Control
  |                                      Pack      | |     |XX Cable
  |                                                +-+     |XX
  |                                                +-+     |XX
  |                                                | |J8   |XX
  |                                                | |     |XX
  |                                                | |     |
  |                                                1-+     |XX Power
  |                                                        |XX J1
  +--------------------------------------------------------+



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                      J   U   M   P   E   R   S
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SEAGATE  ST4383E/ST4384E/ST4442E  PRODUCT MANUAL 77765300-K

 Jumper setting
 ==============

 x = Jumpers are set at factory



 J1  Power Connector
 -------------------

          +---+---+---+---+
          | 1 | 2 | 3 | 4 |
          +--++--++--++--++
             |   |   |   +---------- + 5V
             |   |   +-------------- + 5V Return
             |   +------------------ +12V Return
             +---------------------- +12V



 J8   Drive select
 -----------------

        Drive    1     2     3     4     5     6     7
        ------+-----+-----+-----+-----+-----+-----+-----
  x       1   |CLOSE|OPEN |OPEN |OPEN |OPEN |OPEN |OPEN
          2   |OPEN |CLOSE|OPEN |OPEN |OPEN |OPEN |OPEN
          3   |OPEN |OPEN |CLOSE|OPEN |OPEN |OPEN |OPEN
          4   |OPEN |OPEN |OPEN |CLOSE|OPEN |OPEN |OPEN
          5   |OPEN |OPEN |OPEN |OPEN |CLOSE|OPEN |OPEN
          6   |OPEN |OPEN |OPEN |OPEN |OPEN |CLOSE|OPEN
          7   |OPEN |OPEN |OPEN |OPEN |OPEN |OPEN |CLOSE

 Note: Unit select zero (no jumpers) is invalid

 Pins on the drive ID select and configuration select header are
 provided to facilitate manual drive configuration. No devices other
 than jumpers should be connected to these pins. Connection to
 external devices (Switches, Connectors, etc.) could adversely affect
 drive performance. Exact location of these pins and header may be
 changed without notice.


 Drive Select
 ------------
 The following characteristics apply to the Drive Select lines:

  1.   Logical unit designation for up to 7 drives is performed during
       installation by installing jumpers on pins on a connector
       header on the main PWA. The jumpers are installed in a 1
       through 7 position configuration to select device addresses 1
       through 7. Zero is not a valid address.

  2.   The controller shall not attempt to select the drive until 1
       second after DC power is applied. The Ready output will be
       valid (whether asserted or negated) within 1 us after the drive
       is selected.

  3.   The drive will be selected (and the Drive Selected Signal
       asserted) within 1 us after the Drive Select lines contain that
       unit's select address. The drive will be deselected (and the
       Drive Selected signal negated) within 1 us after the Drive
       Select lines contain another unit's select address.

  4.   The Drive Select lines must remain asserted for 1 us after a
       write operation.

  5.   When the Drive Select lines are asserted, a head change will
       occur, requiring a delay before a read or write operation can
       be initiated.



 J9  Motor Start on command
 --------------------------

    1      OPEN    Spindle motor starts on power-up
                   (* Only on series codes above 01)
                   Cylinder selection set for 1,224 cylinder
                   (* Only on series code 01 drives)

           CLOSED  Spindle motor start command required to start motor
                   (* Only on series above 01)
                   Cylinder selection set for 1,412 cylinder
                   (* Only on series code 01 drives)

 * To determine the Series Code of the drive locate the Serial Number
   printed on the label in a SN xxxxxxxx format. The first two digits
   denote the series code.


 J9  Sector Configuration
 ------------------------

           Sectors    |   2   |   3   |   4
       ---------------+-------+-------+---------
             64       | OPEN  | OPEN  | OPEN
             35       | OPEN  | OPEN  | CLOSED
             10       | OPEN  | CLOSED| OPEN
             36       | CLOSED| OPEN  | OPEN
      x      34       | CLOSED| OPEN  | CLOSED
             87       | CLOSED| CLOSED| OPEN
        **Address mark| CLOSED| CLOSED| CLOSED

 ** Used with soft sectored controllers that create their own sector
    boundaries.


 J9   Reserved
 -------------
         5   OPEN   RESERVED for factory test

                 SHOULD BE LEFT OPEN!



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                      I   N   S   T   A   L   L
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SEAGATE  ST4383E/ST4384E/ST4442E  PRODUCT MANUAL 77765300-K

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

 Drive mounting
 --------------

     horizontally             vertically
   +-----------------+   +--+             +--+ +------------------+
   |                 |   |  +-----+ +-----+  | |                  | x
   |                 |   |  |     | |     |  | x+----------------+x
 +-+-----------------+-+ |  |     | |     |  | ||x              x||
 +---------------------+ |  |     | |     |  | ||  x          x  ||
                         |  |     | |     |  | ||    x      x    ||
      x           x      |  |     | |     |  | ||      x  x      ||
 +------x------x-------+ |  +-----+ +-----+  | ||       xx       ||
 +-+------x--x-------+-+ +--+             +--+ ||     x    x     ||
   |       xx        |                         ||   x        x   ||
   |     x    x      |                         || x            x ||
   +---x--------x----+                         |x                x|
     x            x                           x++----------------++x
      UNACCEPTABLE!                                UNACCEPTABLE!
      Never install PC board on the Top!



 Drive Orientation
 -----------------
 Only two drive mounting orientations are permitted: discs in the
 horizontal plane and discs in the vertical plane. The uppermost
 surface must be maintained in a level position or drive performance
 may be adversely affected. In the vertical plane, the drive may be
 mounted on either side, but not on either end. The drive may be not
 mounted inverted (upside down) in the horizontal orientation. It is
 recommended for optimum performance that data written in a given
 orientation be read in that same orientation.


 WREN 5 is designed, manufactured, and tested with a "Plug-in and
 Play" installation philosophy. This minimizes the requirements for
 highly trained personnel to integrate the WREN 5 into an OEM's
 system, wether in a factory or field environment.


 Cooling
 -------
 Cabinet cooling must be designed by the customer so that the ambient
 temperature immediately surrounding the WREN 5 will not exceed
 temperature limits. Specific consideration should be given to
 make ensure adequate air circulation around the heat sinks on the
 circuit board on the rear of the drive.


 Interface Cabling Options
 -------------------------

 View A
    +---------------------Host-Controller---------------------+
    |                                                         |
    |Data Control   Data Control  Data Control   Data Control |
    +--+-----+--------+-----+--------+-----+--------+-----+---+
       |     |        |     |        |     |        |     |
       |     |        |     |        |     |        |     |
       |     |        |     |        |     |        |     |
       |     |        |     |        |     |        |     |
    +-++-+--++-+-+ +-++-+--++-+-+ +-++-+--++-+-+ +-++-+--++-+-+
    | |T |  |*T| | | |T |  |*T| | | |T |  |*T| | | |T |  |*T| |
    | +--+  +--+ | | +--+  +--+ | | +--+  +--+ | | +--+  +--+ |
    |WREN OR ESDI| |WREN OR ESDI| |WREN OR ESDI| |WREN OR ESDI|
    +------------+ +------------+ +------------+ +------------+

    Each control cable length must not exceed 10 feet (3.00m). Each
    data cable length must not exceed 10 feet (3.00m).


   *T  indicates removable terminator resistor pack.
    WREN data ports are permanently terminated.



 Radial Configuration
 --------------------
 View A shows each drive interfaced to its own control cable, which
 allows interfacing an arbitrary number of drives and a variety of
 system operational techniques. Each drive has its data cable and
 control cable radially connected to the host controller. The length
 of each individual cable must not exceed 10 feet (3.00 meters).
 Terminator resistors must be installed in the host controller for
 each data cable and for each control cable. For this configuration, a
 terminator resistor pack must be installed in each WREN 5 Disc Drive.



 View B
    +--------------Host Controller-------------+
    |                                          |
    |Data Control   Data          Data         |
    +-+------+-------+--------------+----------+
      |      |       |              |
      |      |       |              |
      |      |       |              |
      |      +--**---+-------+------+-------+
    +++-+----+---+ +++-+-----+--+ +++-+----++-++
    ||T |        | ||T |        | ||T |    |*T||
    |+--+        | |+--+        | |+--+    +--+|
    |WREN OR ESDI| |WREN OR ESDI| |WREN OR ESDI|
    +------------+ +------------+ +------------+

    Total control cable length must not exceed 10 feet (3.00m). Each
    data cable length must not exceed 10 feet (3.00m).

   *T  indicates removable terminator resistor pack.
   WREN data ports are permanently terminated.
   ** A maximum of 7 devices may be interconnected.


 Daisychain Configuration
 ------------------------
 A daisychain configuration incorporates a maximum of seven drives in
 parallel on a common control cable. Only the drive selected by the
 host system has its control and data signals enabled through this
 common interface. View B shouws illustrates a daisychain of WREN 5
 Disc Drives or other ESDI devices. A terminator resistor pack is
 required in the host controller for each data cable. Only the last
 ESDI device in the daisychain requires a terminator resistor pack for
 the control cable. Terminator resistor packs for the control cable or
 other drives must be removed. The total combined control cable length
 (from the controller to the first drive, to the second and subsequent
 drives) must not be more than 10 feet (3.00 meters).


 DC Cable and Connector
 ----------------------
 The WREN 5 receives DC power through a 4 pin right angle connector
 mounted on the main circuit board. Recommended part number for the
 mating connector are provided, but equivalent parts may be used.

 Type of cable:      18 AWG
 Connector:          AMP 1-480424-0
 Contacts:           AMP 60619-4 (Loose Piece); AMP 61117-4 (Strip)


 Data Cable and Connector
 ------------------------
 The I/O connector for the data interface is a 20 pin board edge
 connector. The odd pins are located on the back side of the printed
 circuit board. The evne pins are on the front side (down) side of the
 printed circuit board. A key slot is provided between pins 3 and 5.
 Seagate recommends keying this connector to prevent installing it
 upside down. However, the WREN will not be damaged if the connector
 is installed upside down.

 Recommended part numbers for the mating connector are included below,
 but equivalent parts may be used.

 Connector:          20 pin, 3M-3461-0001, AMP 88373-6
 Cable:              Flat Cable (Stranded AWG 28) 3M-3365-20
                     Flat Cable (Stranded AWG 28) 3M-3517-20 (Shielded
                     Cable)
 Key:                AMP 583274-1, 3M-3439-0000


 Control Cable and Connector
 ---------------------------
 The I/O connector for the control interface is a 34 pin board edge
 connector. The odd pins are located on the back (up) side of the
 printed circuit board and are connected to the ground plane. The even
 pins are on the front (down) side of the printed circuit board. A key
 slot is provided between pin 3 and 5. Seagate recommends keying this
 connector to prevent installing it upside down. However, the WREN
 will not be damaged if the connector is installed upside down.

 Recommended part numbers for the mating connector are included below,
 but equivalent parts may be used.

 Connector:          34 pin, 3M-3463-0001, AMP 88373-3
 Key:                AMP 583274-1, 3M-3439-0000
 Cable:              Flat cable (Stranded AWG 28) 3M-3365-34
                     Flat cable (Stranded AWG 28) 3M-3517-34 (Shielded
                     Cable)
                     Spectra Strip Twist'n Flat 455-248-34 (Stranded
                     AWG 28 Twisted Pair)


 Interface Drivers/Receivers
 ---------------------------
 The WREN 5 uses two types of signals; single ended and balanced
 differential. The data and clock signals use balanced differential
 drivers and receivers. All other signals use single ended drivers and
 receivers.

 Single Ended Drivers/Receivers
 -------------------------------
 Transmitter Characteristics
 The WREN 5 uses the 74F38 open collector buffer/driver to transmit
 status to the host. This driver is capable of sinking a current of
 40 mA with a low-level output voltage of 0.7V.

 Receiver Characteristics
 The WREN 5 uses the 74LS14 Hex Inverter with hysteresis gate as a
 line receiver. The input of each receiver is terminated in a 150 ohm
 pullup resistor.

 Terminator Characteristics
 The terminator is a resistor module that plugs into a socket in the
 last drive in a daisychain. Each drive is furnished with a
 terminator. Terminators must be removed from all except the last
 drive on the cable prior to daisychain operation. An equivalent
 terminator must be provided in the controller on each input signal
 line from the drive to the controller. Only the control cable
 resistor module is removable.


 Balanced Differential Drivers/Receivers
 ---------------------------------------
 Transmitter Characteristics
 The WREN 5 uses 75158 balanced differential driver. An assertion on
 the interface is defined when "+" output is more positive than the
 "-" output.

 Receiver Characteristics
 ------------------------
 The WREN 5 uses 75157 type balanced differential receivers. An
 assertion one on the interface is defined when the "+" input is more
 positive than the "-" input.

 Terminator Requirements
 -----------------------
 Each differential receiver in the drive is terminated with a 100 ohm
 resistor. An equivalent terminator must be provided in the controller
 on each input signal line from the drive to the controller.



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                      F   E   A   T   U   R   E  S
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SEAGATE  ST4383E/ST4384E/ST4442E  PRODUCT MANUAL 77765300-K

 Standards
 ---------
 The WREN 5 has been developed as a system peripherals to the highest
 standards of design and construction. The WREN 5 depends upon its
 equipment to provide adequate power and environment in order to
 achieve optimum performance and compliance with applicable industry
 and governmental regualations. Special attention must be given in the
 areas of safety, power distribution, shielding, audible noise
 control, and temperature regulation.

 The WREN 5 complies with Seagate standards.

 The WREN 5 is a UL Recognized component per UL478 and a CSA Certified
 product per CSA C22.2, No. 220-M1986. It also meets the requirements
 of DIN IEC 380/VDE 0806/8.81, DIN IEC 435/VDE 0805/11.84 and EN
 60950/09.87.

 The WREN 5, as delivered, is designed for system integration before
 use. It is supplied as a sub-assembly and is therefore not directly
 subject to the FCC Rules and Regulations, Part 15, Subpart J
 governing EMI of computing devices, and the Radio Interference
 Regulations of the Canadian Department of Communications.

 Media Description
 -----------------
 The media used in the WREN 5 has a diameter of approximately 5
 inches (130 mm). The aluminum substrate is coated with a thin film
 magnetic material, and lubricated to permit the heads to contact the
 surface when starting and stopping.

 Each data surface has either a total of 1412 tracks and is capable of
 recording 29,482,560 bytes of unformatted data, or has 1224 Tracks
 capable of recording 25,557,120 Bytes of unformatted data.

 Media defects are characterized as correctable or uncorrectable de-
 pending on the type and magnitude of the media flaw. Various error
 correction codes may be implemented. The code chosen should be
 consistent with Seagate media testing and certification methods. In
 the WREN 5 media certification is performed using the following
 standards:
            An error burst of 11 bits or less is a correctable error.

            An error burst greater than 11 bits in length is an un-
            correctable error.

 Host systems using the WREN 5 should have, as a minimum, resident
 capabilities to recognize and map defective tracks and perform track
 reallocation routines.

       1. 1224 or 1412 total tracks per surface.

       2. Tracks 0 to be error free on each data surface.

       3. 30 defects per surface maximum.

       4. Cumulative defects not to exceed 1 per megabyte, based on
          total available unformatted drive capacity.



 Drive/Receiver Characteristics
 ------------------------------
 Logic Level                   Drive Output         Receiver Input
 --------------------------------------------------------------------
 High (negated) (0)      2.5 V;   5.25 V      2.0 V;   5.25 V
 Low (asserted) (1)      0.7 V;   0.0 V       0.8 V;   0.0 V

 The difference in the voltages between input and output signals is
 due to the losses in the cable.


 Seek Time
 ---------

                                          | ST4383E|ST4384E|ST4442E
        ----------------------------------+--------+-------+--------
        Track-to-Track         msec. typ. |   4    |    3  |    3
                               msec. max. |   5    |    4  |    4
                       Average msec. typ. |  18    |  14.5 |   16
                       Average msec. max. |  20    |  16.5 |   18
        Latency                msec. avg. |   8.33 |   8.33|    8.33
        ----------------------------------+--------+-------+--------

 Seek time is defined as the elapsed time from the receipt of a seek
 command until the drive signals the controller that it is ready to
 perform another seek or a read/write function on the new cylinder.
 Average seek time is determined by dividing the sum of the time for
 all possible movements by the total number of movements.


 Spindle Speed and Latency
 -------------------------
 The spindle speed is 3600   0.5% r/min. The speed tolerance includes
 motor performance and motor control circuit tolerances.

 The average latency time is 8.33 milliseconds, based on a nominal
 disc speed of 3600 r/min. The maximum latency time is 16.67 milli-
 seconds based on a maximum disc speed of 3564 r/min.


 Read Data Transfer Rate
 -----------------------
 The nominal read serial data transfer rate is 10.0 Mbits per second,
 1.25 Megabytes per second.


 Power Sequencing
 ----------------
 Power sequencing is not required for the WREN 5. The drive protects
 against inadvertent writing during power up and down. Daisychain
 operation requires that power be maintained on the terminated unit
 to insure proper termination of the peripherals I/O cables.


 Temperature
 -----------
 50*F to 122*F (10*C to 50*C) operating ambient with a maximum
 gradient of 36* F (20* C) per hour. The maximum temperature is
 derated linearly to 1.8* F per 1640 feet. Cabinet packaging designs
 must provide ample air circulation around the WREN 5 to ensure
 environmental limits are not exceeded as a result of heat transfer
 from other system components. Operating Ambient is defined as the
 average temperature 0.25 inch outward from the top of the drive
 chassis at the middle of the drive (lengthwise). The temperature of
 the top cover must not exceed 140*F (60* C) when measured at the
 center of the drive.


 Reliability
 -----------
 The following reliability specifications assume correct host/drive
 operational interface implementation, including all interface
 timings, power supply voltages, environmental conditions, and
 appropriate data handling circuits in the host system.

 MTBF                     100,000 hours
 Service Life             5 years
 Preventive Maintenance   None required


