
M 2 2 4 2 A S 2    FUJITSU
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders     754|     |     |
Capacity form/unform    43/   55 MB        Heads           7|     |     |
Seek time   / track  30.0/ 6.0 ms          Sector/track   16|     |     |
Controller           MFM / ST506           Precompensation   383
Cache/Buffer               KB              Landing Zone      753
Data transfer rate    0.625 MB/S int       Bytes/Sector      512
                      0.625 MB/S ext
Recording method     MFM                            operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         5 45    |    -40 60
Power: sleep              W     Humidity     %        20 80    |      5 95
       standby            W     Altitude    km            3.000|        12.000
       idle               W     Shock        g         2       |     20
       seek               W     Rotation   RPM      3600
       read/write    30.0 W     Acoustic   dBA        45
       spin-up            W     ECC        Bit
                                MTBF         h      30000
                                Warranty Month
Lift/Lock/Park     NO           Certificates                                  

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FUJITSU  M224XAS2  OEM MANUAL 41FH5013E-01

  +------------------------------------------------------+
  |                                           O O O O LED|xx 20P
  |                                           4 3 2 1    |xx card
  |                                                      |xx edge
  |                                                      |xx
  |                                                      |xx
  |                                             +------+ |xx
  |                                             | SW1  | |xx
  |                                             +------+ |
  |                                                      |xx 34P
  |                                                      |xx card
  |                                                      |xx edge
  |                                             +------+ |xx
  |                                             | SW2  | |xx
  |                                             +------+ |xx
  |                                          CNH3        |
  |                                      10+-----+2      |XX Power
  |                                       9+-----+1      |XX
  +------------------------------------------------------+



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FUJITSU  M224XAS2  OEM MANUAL 41FH5013E-01

 Jumper Settings
 ===============


 x = Jumpers are set from factory


 SW1  Drive Selection
 --------------------
 DRIVE SELECTION ..... Key 1 to Key 4 in SW1

 Key 1 to 4 in SW1 are used to one of up to a maximum of four drives.
 The relevant key is to be turned "ON" while the others should be
 turned "OFF".

    +----------+---------------+
    | Drive    |Key No. in SW1 |
    | Number   +---+---+---+---+
    |          | 1 | 2 | 3 | 4 |
    +----------+---+---+---+---+
  x |    1     | o | x | x | x |
    +----------+---+---+---+---+
    |    2     | x | o | x | x |
    +----------+---+---+---+---+
    |    3     | x | x | o | x |
    +----------+---+---+---+---+
    |    4     | x | x | x | o |
    +----------+---+---+---+---+
    o: "ON"
    x: "OFF"



 SW1  Drive Selected Signal
 --------------------------
 Control of DRIVE SELECTED Signal .... Key 5 in SW1

  "ON" side ... A drive is in a selecded state regardless of DRIVE
                SELECT 1 to 4, which means DRIVE SELECTED signal is
                always true ans all Input/Output signals are validated
                without selecting the drive.

 x"OFF" side .. Drive Selected signal becomes true and all
                input/output signals are validated only when a drive
                is selected with Drive Select 1 to 4.


 SW1   Motor On signal
 ---------------------
 CONTROL OF MOTOR ON SIGNAL .... Key 6 and 7 in SW1

    +--------------------------+-------+
    |                          |  Key  |
    |                          +---+---+
    |                          | 6 | 7 |
    +--------------------------+---+---+
    | By the Motor On signal   | x | o |
    +--------------------------+---+---+
  x | When the power-on        | o | x |
    +--------------------------+---+---+
    o: "ON"
    x: "OFF"

 Keys 6 and 7 are used to select the DC motor starting either by the
 Motor On signal or not.


 SW1  Buffered Seek
 ------------------
 SEMI BUFFERED SEEK, FULL BUFFERED SEEK .... Key 8 in SW1

     Key 8  ON   Semi buffered seek mode
  x         OFF  Slave step mode (full buffered seek mode)


 SW2  Terminate the control signals
 ----------------------------------
 This switch is used to terminate the control signals. Keys 1 to 8 in
 SW2 of the last drive must be set to "ON" (in the other drives, must
 be set to "OFF"). All keyse are set to "ON" at factory shippment.


 CNH3  Short plug setting
 ------------------------

    +-------------------------------------+------------------+
    |                                     |Incerting location|
    |                                     |of short plug     |
    +-------------------------------------+------------------+
    | Use as Reduced Write Current signal |Pin 01-02         |
    +-------------------------------------+------------------+
   x| Use as Head Select 3 signal         |Pin 03-04 *       |
    +-------------------------------------+------------------+
    *: M2243AS2 must be done this setting.



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FUJITSU  M224XAS2  OEM MANUAL 41FH5013E-01

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


     horizontally                           vertically
   +-----------------+             +--+                       +--+
   |                 |             |  +-----+           +-----+  |
   |                 |             |  |     |           |     |  |
 +-+-----------------+-+           |  |     |           |     |  |
 +---------------------+           |  |     |           |     |  |
                                   |  |     |           |     |  |
      x           x                |  |     |           |     |  |
 +------x------x-------+           |  +-----+           +-----+  |
 +-+------x--x-------+-+           +--+                       +--+
   |       xx        |
   |     x    x      |
   +---x--------x----+
     x            x

 The drive may be installed horizontally or vertically, except the
 horizontal position with the PCB on top.


 Frame structure
 ---------------
 The disk enclosure (signal ground) is electrically isolated from the
 drive mounting frame (frame ground). When mounting the drive in a
 cabinet frame, the frame should clear the drive by at least 3.5 mm
 to prevent the drive from touching the cabinet frame.


 Ambient temperature
 -------------------
 The operating temperature range of the drive is specified at a dis-
 tance of 3 cm from the drive.


 Cable connection
 ----------------
 The drive is interfaced to a system through four connectors.


 Multiple drive Connection
 -------------------------
 +-------------+              +--------------+
 |             +-A-cable--*---+  Drive 1     +---------------------+
 |             +-B-cable--+---+              |                     |
 |             |          |   +--------------+                     |
 |             |          *---+  Drive 2     +-----------------+   |
 |             +-B-cable--+---+              |                 |   |
 | Controller  |          |   +--------------+                 |   |
 |             |          *---+  Drive 3     |                 |   |
 |             +-B-cable--+---+              +------------+    |   |
 |             |          |   +--------------+            |    |   |
 |             |          +---X  Drive 4     |            |    |   |
 |             +-B-cable------+              +--------+   |    |   |
 |             |              +--------------+        |   |    |   |
 +-------------+                                      |   |    |   |
 |             +-------Power-cable--------------------+   |    |   |
 |             |                                          |    |   |
 |             +-------Power-cable------------------------+    |   |
 | Power supply|                                               |   |
 |             +-------Power-cable-----------------------------+   |
 |             |                                                   |
 |             +-------Power-cable---------------------------------+
 +-------------+


 Connection of drive to a controller is shown in that figure. To
 connect two to four drives, the A cable (control signals) must be
 connected in series and the B cable (R/W signals) in parallel. The
 termination of control signals must be performed only at the last
 drive.


 Power supply connector
 ----------------------

 +-----------------+  1 = +12 V
 |  4   3   2   1  |  2 = +12 V RTN
 +-----------------+  3 = + 5 V RTN
                      4 = + 5 V

 Noise filter
 ------------
 To eliminate AC line noise, a noise filter of the specifications
 given below should be incorporated in the AC input terminal of the
 disk drive power supply.

 Attenuation characteristic: 40 dB or greater at 10MHz
 Circuit configuration:      T type



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                      F   E   A   T   U   R   E  S
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FUJITSU  M224XAS2  OEM MANUAL 41FH5013E-01

 Media error
 -----------
 Cylinder 0 is defect free.
 The number of defect in the drive are as follows:

 M2241AS2 .... 31
 M2242AS2 .... 54
 M2243AS2 .... 86


 Mean Time Between Failures (MTBF)
 ---------------------------------
 The MTBFs of the drive during their life time are 30,000 hours
 estimated value after an initial period of 3-month.

 Failure of the equipment means failure that requires either repairs,
 adjustments, or replacement. Mishandling by the operator, failures
 due to bad environmental conditions, power trouble, controller
 trouble, cable failures, or other failures no caused by the equipment
 are not included.


 Mean Time To Repair
 -------------------
 MTTR is the average time taken by well-trained service mechanic to
 diagnose and repair a unit malfunction. The drive is designed for a
 MTTR of 30 minutes or less.


 Service life
 ------------
 Overhaul of the drive is not required for the first five years.


 Power loss
 ----------
 Integrity of the data on the disk is guranteed against all froms of
 abnormal DC power failure except a power failure during writing.


 Write Precompensation
 ---------------------
 Whenever two bits are written in close proximity to each other, a
 phenomenon called pulse superposition occurs, which tends to cause
 the two bits to move away from each other. This is a large factor
 contributing to bit shift.
 The effect of bit shift can be reduced by a technique called pre-
 compensation, which, by detecting which bits will occur early and
 which bits will occur late, can effectivly minimize the shift by
 writing these bits in the opposite direction of the expected shift.
 Precompensation had better be done at 0   383 cylinders, but may be
 done at all cylinders. Performance without write precompensation is
 also guaranteed. The optimum amount of pre-compensation is 12 nano-
 seconds for both early and late written bits.

 Start and stop time
 -------------------
 Start time (time from when power is turned on until the unit is
 ready) is 20 seconds or less and stop time (time to completely stop
 when power is turned off) is 15 seconds or less using dynamic
 braking.


 Binary decode of status LEDs
 ----------------------------

 +--+---+---+---+----+------------------------------------+
 |  | 4 | 3 | 2 | 1  |     Status                         |
 +--+---+---+---+----+------------------------------------+
 | 1|   |   |   | x  |     Low Rotationl Speed            |
 +--+---+---+---+----+------------------------------------+
 | 2|   |   | x |    |     VCM Heat                       |
 +--+---+---+---+----+------------------------------------+
 | 3|   |   | x | x  |     Initial Seek Timeout           |
 +--+---+---+---+----+------------------------------------+
 | 4|   | x |   |    |     Write during Seek              |
 +--+---+---+---+----+------------------------------------+
 | 5|   | x |   | x  |     Power Failure                  |
 +--+---+---+---+----+------------------------------------+
 | 6|   | x | x |    |     Write Off-track Check          |
 +--+---+---+---+----+------------------------------------+
 | 7|   | x | x | x  |     Write Unsafe                   |
 +--+---+---+---+----+------------------------------------+
 | 8| x |   |   |    |     Multiple Head Check            |
 +--+---+---+---+----+------------------------------------+
 | 9| x |   |   | x  |     Seek Timeout                   |
 +--+---+---+---+----+------------------------------------+
 | A| x |   | x |    |     Seek Guard Band                |
 +--+---+---+---+----+------------------------------------+
 | B| x |   | x | x  |     Linear Mode Guard Band         |
 +--+---+---+---+----+------------------------------------+
 | C| x | x |   |    |     Over-shoot Check               |
 +--+---+---+---+----+------------------------------------+
 | D| x | x |   | x  |     Illegal Cylinder               |
 +--+---+---+---+----+------------------------------------+
 | E| x | x | x |    |     Head-unload during Ready       |
 +--+---+---+---+----+------------------------------------+
 | F| x | x | x | x  |     Not Used                       |
 +--+---+---+---+----+------------------------------------+


