
2 3 0 0    SIEMENS NIXDORF
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders    1216|     |     |
Capacity form/unform   261/  310 MB        Heads          12|     |     |
Seek time   / track  25.0/ 5.0 ms          Sector/track   35|     |     |
Controller           SCSI1 SINGLE-ENDED    Precompensation
Cache/Buffer            32 KB FIFO BUFFER  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 45    |    -20 50
Power: sleep              W     Humidity     %        20 80    |     10 90
       standby            W     Altitude    km    -0.300  3.000| -0.300 12.000
       idle               W     Shock        g         3       |     10
       seek               W     Rotation   RPM      3524
       read/write    30.0 W     Acoustic   dBA        55
       spin-up            W     ECC        Bit   48
                                MTBF         h      30000
                                Warranty Month
Lift/Lock/Park     YES          Certificates                                  

**********************************************************************
                        L   A   Y   O   U   T
**********************************************************************
EZI      MEGAFILE SCSI  PRODUCT DESCRIPTION REV. A, AUGUST 1987

  +----------------------------------------------xxxxxxxxJ10+
  |                                   Terminator xxxxxxxx   |XXI
  |                                   Resistor Packs     J9 |XXN
  |                                                         |XXT
  |                                                         |XXE
  |                                                         |XXR
  |                                                         |XXF  J1
  |                                                         |XXA
  |                                                         |XXC
  |                                                         |XXE
  |                                                         |1X
  |                                                         |+-J2
  |                                                         || |ID
  |                                                         || |
  |                                                         |1-+
  |                                                         |XX
  |                                                         |XX J3
  +---------------------------------------------------------+1  Power







      +---------+------------------+---------+
      |         |                  |         |
      |         |X J18 Ground      |         |
      |         +------------------+         |
      |                                      |
      |   J3    J2              J1           |
      | XXXXX xxxxxxx XXXXXXXXXXXXXXXXXXXXXXX|
      +-1-----1-------1----------------------+



**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
EZI      MEGAFILE SCSI  PRODUCT DESCRIPTIO REV. A, AUGUST 1987

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

 J9 and J10  Terminators
 -----------------------
 All single-drive systems have terminators J9 and J10 installed. For
 multi-drive systems, terminators J9 and J10 may only installed in the
 last drive of a daisychain configuration. All drives are shipped with
 the terminators installed.


 J18  Grounding Connector
 ------------------------
 The frame grounding connector (J18) is a Faston AMP P/N 61761-2 tap
 connector. The recommended mating connector is AMP P/N 62187-1 or
 equivalent. The hole in the Faston tap accomodates a wire size of
 18 AWG.

 Use of frame ground connection is recommended in order to reduce
 ground loops which may result in electrical noise problems.


 J2  Device address selection
 ----------------------------

                   +-------------- Parity
                   |  +----------- Spindle Control
                   |  |  +-------- Reset
       Addr. Filed |  |  |  +----- Write Protected
         +--+--+   |  |  |  |  +-- Reserved
        +--+--+--+--+--+--+--+--+
        |01|03|05|07|09|11|13|15|
        +--+--+--+--+--+--+--+--+
        |02|04|06|08|10|12|14|16|
    ----+--+--+--+--+--+--+--+--+------PC Board
   -------------------------------------

 Device address selection
 ------------------------
 The address of each MegaFile Series Drive is set by installing the
 address jumper on J2 on the device electronics board. Each drive must
 have a unique address. The sequence of addressing is optional. All
 drives are shipped with address 0 preset.

   +----------+-----------------------+
   | SCSI ID  |        Jumpers        |
   |          | 5-6   | 3-4   | 1-2   |
   +----------+-------+-------+-------+
   |    0     | OPEN  | OPEN  | OPEN  |
   |    1     | OPEN  | OPEN  | CLOSED|
   |    2     | OPEN  | CLOSED| OPEN  |
   |    3     | OPEN  | CLOSED| CLOSED|
   |    4     | CLOSED| OPEN  | OPEN  |
   |    5     | CLOSED| OPEN  | CLOSED|
   |    6     | CLOSED| CLOSED| OPEN  |
   |    7     | CLOSED| CLOSED| CLOSED|
   +----------+-------+-------+-------+


 J2 7,8  Parity check
 --------------------
 Jumper installed: Parity check enabled


 J2 9,10  Spindle control
 ------------------------
 Jumper installed: Automatic spin up


 J2 11,12  Reset option
 ----------------------
 Jumper installed: Hard SCSI reset


 J2 13,14  Write protect
 -----------------------
 Jumper installed: Drive write protected



**********************************************************************
                      I   N   S   T   A   L   L
**********************************************************************
EZI      MEGAFILE SCSI  PRODUCT DESCRIPTION REV. A, AUGUST 1987

 Notes on Installation
 =====================

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

     PCBA down                     PCBA left           PCBA right
   +-----------------+             +--+                       +--+
   |                 |             |  +-----+           +-----+  |
   |                 |             |  |     |           |     |  |
 +-+-----------------+-+           |  |     |           |     |  |
 +---------------------+           |  |     |           |     |  |
                                   |  |     |           |     |  |
     PCBA up                       |  |     |           |     |  |
 +---------------------+           |  +-----+           +-----+  |
 +-+-----------------+-+           +--+                       +--+
   |                 |
   |                 |
   +-----------------+

 The MegaFile series uses 5.25" industry-standard form factor. The
 drive can be mounted horizontally or vertically using the eight
 mounting holes provided on the outer frame and connecting the power
 cable and the interface cable.

 Mounting holes: 2 per side, #6-32UNC - 2 B 0.14 deep (4x)
                 4 on bottom, #6-32UNC - 2 B 0.4 deep (4x)


 Cooling
 -------
 The enclosure must be designed to allow natural convection of heat by
 permitting the free flow of air around and between the pronted
 circuit board.

 The MegaFile model dissipates typ. 27 watts during normal operation
 conditions. This dissipated heat must be removed from the enclosure
 at a rate that is sufficient to maintain the ambient air temperature
 around the drive at or below 45*C (113*F). The operating temperature
 range is specified at a distance of 30 mm to the Drive.

 NOTE
 External cooling is not required.


 Electrical Interface
 --------------------
 The electrical interface consists of the logical interface for inter-
 connection of the drive to the SCSI-Bus and the power interface for
 delivery or primary power. It is provided via the following
 connectors:

 - J1 = SCSI-Interface connector
 - J3 = DC power connector
 - J18 = frame ground


 Logical Interface
 -----------------
 The logical interface to the drive complies to the SCSI standard ANSI
 X3T9.2/86-109. This standard defines the necessary functional,
 electrical, and mechanical requirements of the interface and provides
 optional features with its connector pin assignment and functional
 protocols.

 The exact description of the standard functions, the optional
 functions, the signal description and the operational specifications
 are defined in the "Interface Specifications for MegaFile (SCSI)".


 J3   DC Power and pin connector assignments
 -------------------------------------------
 Delivery of primary power (DC) is provided by a separate DC power
 connector (J3). Used is a 4 pin AMP MATE-N-LOCK connector P/N
 827001-1 mounted on the component side of the PCB.

 The recommended mating connector is AMP P/N 1-480424-0 utilizing
 AMP pins P/N 350078-4 (strip) or P/N 61173-4 (loose piece) or
 equivalent.

 pin 1    +12 VDC
 pin 2    +12 Volts Return
 pin 3    + 5 Volts Return
 pin 4    + 5 VDC


 Physical Description
 --------------------
 SCSI devices are daisy-chained together using a common cable. Both
 ends of the cable are terminated. All signals are common between all
 SCSI devices.

 Single-ended drives and receivers, whcih allow a maximum cable length
 of six meters (primarily for connection within a cabinet) are
 available.


 Connector Requirements
 ----------------------
 Non shielded connectors are specified. The nonshielded connectors are
 typically used for in-cabinet applications.

 The nonshielded SCSI device connector is a 50-conductor connector
 consisting of two rows of 25 pins with adjacent pins 2.54mm (0.1
 inch) apart.



**********************************************************************
                      F   E   A   T   U   R   E  S
**********************************************************************
EZI      MEGAFILE SCSI  PRODUCT DESCRIPTION REV. A, AUGUST 1987


 Electrical Description
 ----------------------
 NOTE
 For these measurements, SCSI bus termination is assumed to be
 external to the SCSI device. An SCSI device may have the provision
 for allowing optional internal termination.

 All assigned signals shall be terminated with 220 ohms to +5 volts
 (nominal) and 330 ohms to ground at each end of the cable. All
 signals shall use open-collector or three-state drivers.


 Output Characteristics
 ----------------------
 Each signal driven by an SCSI device shall have the following output
 characteristics when measured at the SCSI device's connector:

 Signal assertion                 = 0.0 volts DC to 0.4 volts DC
 Minimum driver output capability = 48 milliamps (sinking) at 0.5
 Volts DC Signal negation         = 2.5 volts DC to 5.25 volts DC


 Input Characteristics
 ---------------------
 Each signal received by an SCSI device shall have the following input
 characteristics when measured at the SCSI device's connector:

 Signal true                     = 0.0 volts DC to 0.8 volts DC
 Maximum total input load        = -0.4 milliamps at 0.4 volts DC
 Signal false                    = 2.0 volts DC to 5.25 volts DC
 Minimum input hysteresis        = 0.2 volts DC


 System Configuration
 --------------------
 The SCSI interface permits a maximum of 8 devices to be connected to
 the SCSI Bus. A MegaFile Series SCSI-drive represents one bus device.
 All drives are assembled with a terminator but in a multiple drive
 configuration the terminator has to be installed only in the last
 physical drive in the chain.


 Spindle Assembly
 ----------------
 A brushless DC motor is embedded in the spindle hub and rotates the
 spindle at 3524 rpm +/- 0,4%. Motor and spindle are dynamically
 balanced to assure a low vibration level.

 Dynamical and mechanical brakes are used to quickly stop the spindle
 assembly when the power i sturned off, or a spin down command is
 executed on.


 Indicators on the Optional Front Panel
 --------------------------------------
 The front panel is optional available. It consists of a plastic panel
 and one red light diode (LED).

 The LED indicate the "BUSY" or "ACTIVE" check if active during
 Disconnect.


 Data Organization
 -----------------
 The MegaFile series is designed to use a fixed sector format. The
 length of the data blocks is 512 Bytes. Each surface has 1216 tracks
 for data recording purposes. Track number -2 is designated for sur-
 face analysis information. Each track is divided into 35 sectors,
 numbered from 0 to 34.


 Media Defects
 -------------
 Media defects are physical imperfections in the magnetic material.
 This defects give repeatedly inability to reliably write and read
 data. At manufacturing of MegaFile several methods are used in order
 to find media defects.

 At the time of shipment the MegaFile Series recording surfaces will
 meet the following requirements:

 1216 total tracks per surface
 max. Defects/Surface: 45
 max. Defects/Drive: Model 2200-200
                     Model 2300-300


 Media Defect Mapping
 --------------------
 At the time of manufacturing, media defect information is recorded
 on the surface analysis cylinder (SA-Cylinder, minus 2) Head 0 and
 Head 7 for Model 2200 and Head 11 for Model 2300.

 Any defects on the media surface will be identified. This defect
 mapping will indicate the head number, track number, and number of
 bytes from index for each defect.

 The embedded controller creates a Primary Defect List, which is
 stored on SA-Cylinder, Hd 1 and can be accessed by the "Read Bad
 Sector"-Command.


