
M 2 2 4 5 S B    FUJITSU
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders     823|     |     |
Capacity form/unform   106/  120 MB        Heads           7|     |     |
Seek time   / track  25.0/ 5.0 ms          Sector/track   19|     |     |
Controller           SCSI1 SINGLE-ENDED    Precompensation
Cache/Buffer            16 KB              Landing Zone
Data transfer rate    1.250 MB/S int       Bytes/Sector     1024
                      2.500 MB/S ext SYNC
Recording method     RLL 2/7                        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    32.0 W     Acoustic   dBA        45
       spin-up            W     ECC        Bit
                                MTBF         h      30000
                                Warranty Month
Lift/Lock/Park     YES          Certificates                                  

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FUJITSU  M2244/2245/2246-S/SA/SB  OEM MANUAL B03P-4805-0202A...01

  +------------------------------------------------------+
  |+0+1+2+3+10---CN102                         +RM57--+  |--+
  |+-+-+-+-++----1                             +------+  |  |-SOLDERED
  | LED                                        +RM57--+  |  | SIDE
  |                COMPONENT                   +------+  |XX|
  |                SIDE                   2-1 2-1        |XX|SCSI
  |                                   CN105 | |CN104     |XX|INTERFACE
  |                                       | | | |        |XX|
  |                                      1615 1615       |XX|
  |              16-CNH4-+ +CN103                        |XX|
  |              15------1 9----1                        |XX|
  |  16-CNH2--2                                          |XX|
  |  15-------1                                          |XX|
  |                                                      |XX|
  |                                                      |XX|
  |                                                      |  |XX Power
  |16-CNH3-2                                 16-CNH1---2 |  |XX
  |15------1                                 15--------1 |--+
  +------------------------------------------------------+



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FUJITSU  M2244/2245/2246-S/SA/SB  OEM MANUAL B03P-4805-0202A...01

 Jumper settings
 ===============

 x = Jumper set at factory

 Short plugs are inserted as follows when shipped from the factory.

   CN105:  Between 1 and 2, 3 and 4, 5 and 6, 7 and 8, 9 and 10
   CNH2:   Between 15 and 16
   CNH4:   Between 15 and 16

 The following settings are model specific.

   CNH4:   Between 13 and 14: M2246
           Between 11 and 12: M2245
           No short plug between 11 and 12 or 13 and 14: M2244



 Host interface connector signal assignements
 --------------------------------------------
       Pin number    Signal    Signal    Pin number
       --------------------------------------------
          01         GND       -DB0          02
          03         GND       -DB1          04
          05         GND       -DB2          06
          07         GND       -DB3          08
          09         GND       -DB4          10
          11         GND       -DB5          12
          13         GND       -DB6          14
          15         GND       -DB7          16
          17         GND       -DB8          18
          19         GND       GND           20
          21         GND       GND           22
          23         GND       GND           24
          25         (Open)    TERMPWR *     26
          27         GND       GND           28
          29         GND       GND           30
          31         GND       -ATN          32
          33         GND       GND           34
          35         GND       -BSY          36
          37         GND       -ACK          38
          39         GND       -RST          40
          41         GND       -MSG          42
          43         GND       -SEL          44
          45         GND       -C/D          46
          47         GND       -REQ          48
          49         GND       -I/O          50

 * Power supply for terminator (+5VDC)



 CN105  SCSI ID setting
 ----------------------
       SCSI ID    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
       ----------------------------
 x       7       CLOSED CLOSED CLOSED

 A specified ID must be unique on the SCSI bus.
 The priority of SCSI bus use in ARBITRATION phase is as follows:
 7 > 6 > 5 > 4 > 3 > 2 > 1 > 0


 CN105  SCSI parity check option setting
 ---------------------------------------
       7-8   OPEN      Disable: IDD does not execute parity check
 x           CLOSED    Enable:  IDD executes a parity check

 This option specifies whether to enable or disable the SCSI data bus
 parity bit check facility.


 CN105  Arbitration option setting
 ---------------------------------
       9-10  OPEN     Disable
             CLOSED   Enable

 This option specifies whether to enable or disable the Arbitration
 phase. If the Arbitration phase is disabled, the Disconnect/reconnect
 function on SCSI is inhibited.


 CNH4  Device type selection
 ---------------------------
                                11-12   13-14
       ----------------------------------------
       M2244S/SA/SB             OPEN    OPEN
       M2245S/SA/SB             CLOSED  OPEN
       M2246S/SA/SB             OPEN    CLOSED

 Setting values are valid when the power is on.


 CNH4  Option for motor start control from interface setting
 -----------------------------------------------------------
      15-16  CLOSED   Disable: The spindle motor starts when IDD's
                               power is turned on.
             OPEN     Enable:  The spindle motor starts by Start/Stop
                               Unit command

 This option specifies whether to enable or disable the function for
 spindle motor start control from interface.


 LED indicators
 --------------
     +---+---+---+---+---------------------------------------------+
     |L3 |L2 |L1 |L0 |                                             |
     +---+---+---+---+-------+                                     |
     |RED| AMBER     | COLOR |       IDD state                     |
     +---+---+---+---+-------+--------------------+----------------+
     |OFF|OFF|OFF|OFF| Operating                  |LEDs Indicates  |
     +---+---+---+---+----------------------------+the operation   |
     |OFF|OFF|OFF|ON | Idle (IDD ready)           |status          |
     +---+---+---+---+----------------------------+                |
     |OFF|OFF|ON |ON | In diagnostics             |                |
     +---+---+---+---+----------------------------+----------------+
     |OFF|OFF|ON |OFF| Drive error has been de-   |LEDs Indicates  |
     |   |   |   |   | tected during diagnosing   |the results of  |
     +---+---+---+---+----------------------------+diagnostics     |
     |OFF|ON |OFF|OFF| ROM error has been detected|                |
     |   |   |   |   | during operation           |                |
     +---+---+---+---+----------------------------+                |
     |OFF|ON |OFF|ON | RAM error has been detected|                |
     |   |   |   |   | during operation           |                |
     +---+---+---+---+----------------------------+                |
     |OFF|ON |ON |OFF| Register error has been de-|                |
     |   |   |   |   | tected during diagnosing   |                |
     +---+---+---+---+----------------------------+                |
     |OFF|ON |ON |ON | Buffer error has been de-  |                |
     |   |   |   |   | tected during diagnosing   |                |
     +---+---+---+---+----------------------------+----------------+
     |ON |OFF|OFF|OFF| Drive hard error has been  |LEDs Indicates  |
     |   |   |   |   | detected                   |the fault status|
     +---+---+---+---+----------------------------+                |
     |ON |OFF|OFF|ON | Spindle motor revolution   |                |
     |   |   |   |   | fewer than 90% of standard |                |
     +---+---+---+---+----------------------------+                |
     |ON |OFF|ON |OFF| VCM overcurrent            |                |
     +---+---+---+---+----------------------------+                |
     |ON |OFF|ON |ON | Initial seek timeout       |                |
     +---+---+---+---+----------------------------+                |
     |ON |ON |OFF|OFF| +12V/+5V, less than 80% of |                |
     |   |   |   |   | standard                   |                |
     +---+---+---+---+----------------------------+                |
     |ON |ON |OFF|ON | Seek error                 |                |
     +---+---+---+---+----------------------------+                |
     |ON |ON |ON |ON | Controller hard error      |                |
     +---+---+---+---+----------------------------+----------------+

 The 4-bit LED (L3 to L0) indicates the IDD operation status and
 results of diagnostics.


 Operator panel connection
 -------------------------
 The Operator panel connector is connected to Ready indicator, and it
 also provides for optional connection of write protect switch.

                        +--+----------+---------------------+
 View from   +------+   |  | Signal   |                     |
 cable side  | 3  1 |   |  | Mnemonic |Definiton            |
 of connector| 4  2 |   +--+----------+---------------------+
          ---+------+-- | 1| Z01A     |TTL High level       |
                        +--+----------+---------------------+
                        | 2| *FPTCT   |Write Protect Switch |
                        +--+----------+---------------------+
                        | 3| 0V       |Signal ground        |
                        +--+----------+---------------------+
                        | 4| *CMDCMP  |Ready indicator      |
                        +--+----------+---------------------+



 DC Power and pin connector assignments
 --------------------------------------
      +------------+   pin 1    +12 VDC
 -----+ 1  2  3  4 +-- pin 2    +12 Volts Return
      +------------+   pin 3    + 5 Volts Return
 View from cable       pin 4    + 5 VDC
 side of connector



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FUJITSU  M2244/2245/2246-S/SA/SB  OEM MANUAL B03P-4805-0202A...1

 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

 There are three possible installation directions, and the mounting
 angle must be  5* from the horizontal.


 Ambient temperature
 -------------------
 The operating temperature range of the IDD is specified at a distance
 of 3 cm from the IDD.


 Air Circulation
 ---------------
 The heads, disks, and actuator are sealed inside a cover to kept out
 dust and other pollutants.

 This head assembly has a closed-loop air recirculation system using
 the blower effect of the rotating disks to continuously cycle air
 through the recirculation filter. This filter traps any dust
 generated inside the enclosure. To prevent negative pressure in the
 vicinity of the spindle when the disks begin rotating, a breather
 filter is attached. This breather filter also equalizes the internal
 air pressure with the atmospheric pressure due to surrounding
 temperature changes.


 DC Grounding
 ------------
 For DC ground, a fasten tab is provided as the SG connector.


 Frame Structure
 ---------------
 The casting/DE (signal ground) is electrically isolated from the
 mounting brackets (frame ground). In this isolation is to be main-
 tained within the system, precautions must be taken. An embossed
 structure (or any other structure that does not touch the aluminium
 base) should be used to prevent the aluminium base from touching the
 frame ground. The mounting screws should project no more than 4 mm
 from the outer wall of the drive mounting bracket.


 System Configuration
 --------------------
 Host system, IDDs, and other SCSI controllers are connected (daisy-
 chained) to SCSI provided that the total number of connected SCSI
 devices is a maximum of eigth.

     +--------+
     |HOST (1)|                      +---------+
     |        | <-SCSI---+---------> |  IDD    |
     +--------+          |           +---------+
                         |
                         |           +---------+
                         +---------> |   IDD   |
                         |           +---------+
                         |
                         |
                         |
                         |
     +--------+          |           +---------+ Other SCSI
     |HOST (2)| <--------+---------->|         | Controller
     |        |                      |         |
     +--------+                      +---------+

              System configuration example


 Recommended parts for connection
 --------------------------------

  +------------+-----------------+---------------+--------------+
  |            |Name             |Model          |Manufacturer  |
  +------------+-----------------+---------------+--------------+
  | Host       |Cable Connector  |FCN-7007J050-  |Fujitsu       |
  | interface  |(IDD, closed-end)|AU/B           |              |
  | SCSI       +-----------------+---------------+--------------+
  |            |Cable Connector  |FCN-707J050-   |Fujitsu       |
  |            |IDD, throughend) |AU/0           |              |
  |            +-----------------+---------------+--------------+
  |            |Cable            |455-248-50     |SPECTRA-      |
  |            |                 |               | STRIP        |
  +------------+-----------------+---------------+--------------+
  | Drive Power|Cable Connector  |1-480424-0     |AMP           |
  | Supply     +-----------------+---------------+--------------+
  |            |Contact          |170121-4       |AMP           |
  |            +-----------------+---------------+--------------+
  |            |Cable            |AWG-18         |              |
  +------------+-----------------+---------------+--------------+
  | SG         |Cable faston     |62187-1        |AMP           |
  |            |receptacle       |               |              |
  |            +-----------------+---------------+--------------+
  |            |Faston tab for   |61761-2        |AMP           |
  |            |the IDD          |               |              |
  |            +-----------------+---------------+--------------+
  |            |Cable            |AWG20          |              |
  +------------+-----------------+---------------+--------------+


 Connection of components
 ------------------------
 The following figure shows the cable connection between IDD and host
 system. Total length of the SCSI interface cable must be shorter than
 7 m. The terminator is only installed in socket on controller PCA
 when IDD is connected to the beginning or ending position of SCSI
 cable. Up to eigth SCSI devices can be connected to the SCSI bus.


       +-------+-+          +---------+ Power     +---------+
       |Host   | |          |  IDD1   XxxxxxxxxxxxX Power   |
       |System |T+---SCSI-+-+         +---+ XxxxxxX Supply  |
       |       +-+        | +---------+   | X XxxxX         |
       |         |        |               | X X   +----+----+
       +---------+        |               | X X        |
                          | +---------+   | X X        |
                          | |  IDD2   Xxxx|xx X        |
                          +-+         +---o---X---FG---+
                          | +---------+   |   X
                          |               F   X
                          |               G   X
                          |               |   X
                          |               |   X Power
                          | +-+--------+  |   X
                          | |T|IDDn    Xxx|xxxx
                          +-+ |        +--+
                            +-+--------+

 FG    = Frame Ground --     T     = Terminator
 Power = xxxx                SCSI  = -----



 Signal values and electrical levels
 -----------------------------------

   Signal value                 Electrical level
   -------------------------------------------------
   TRUE, asserted, on, or 1     Low (0.0 to 0.8 VDC)
   FALSE, negated, released,    High (2.0 to 5.25 VDC)
   off, or 0


 Driver and receiver circuits
 ----------------------------
 (1) Driver circuit for signal other than REQ and ACK

     The MB463 (Fujitsu) or open collector NAND gate equivalent to
     SN7438 (TI) is recommended.

 (2) Receiver circuit for signals other than REQ and ACK

     A schmitt trigger circuit equivalent to SN74LS240 (TI) is
     recommended.


 Termination circuit
 -------------------
 The termination circuit shown in the following figure are installed
 in SCSI devices which are connected at both ends of the interface
 cable.
                      +5 VDC
                       --+--
                         |
                        +++ 220    2%
                        | |
               -SIGNAL  +++
             ------------+
                        +++ 330    2%
                        | |
                GND     +++
             ------------+
                        +++

 Terminators are already installed in IDD a shipment. Remove both
 terminators if the IDD is not installed at beginning or ending
 posistion of SCSI cable.

 Connector Requirements
 ----------------------
 The nonshielded SCSI connector installed on the IDD is a 50-conductor
 connector consisting of two rows of 25 male pins with adjacent pins
 2.54 mm (0.1 in) apart.

 The nonshielded cable connector shall be a 50-conductor connector
 consisting of two rows of 25 female contacts with adjacent contacts
 2.54 mm (0.1 in) apart.


 Cable requirements
 ------------------
 A characteristic impedance of 100    10% i srecommended for unshield-
 ed twisted-pair ribbon cable. A characteristics impedance greater
 than 90  is preferred for shielded cable. A minimum conductor size of
 28 AWG shall be employed. It is recommended that shielded cable be
 used for connection outside of a cabinet.

 To minimize discontinuities and signal reflections, cables of
 different impedance should not be used in the same bus. The maximum
 cable length is 7m. 1m or more cable length is recommended between
 SCSI devices.



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FUJITSU  M2244/2245/2246-S/SA/SB  OEM MANUAL B03P-4805-0202A...01


 Automatic data error correction
 -------------------------------
 If a recoverable error occurs, IDD attempts to recover from errors
 inside the IDD. Correctable data error can be corrected in the data
 buffer so that error-free data can be transferred to the host system.


 Alternate block processing
 --------------------------
 Defective blocks are replaced by alternate blocks. Host system soft-
 ware can deal with the entire space of the drive as if was defect-
 free. High-speed alternate block processing is available without seek
 operations, because an alternate block area is provided for each
 cylinder.


 Media defects
 -------------
    Cylinder 0, Head 0 and 1 are defect free.

    M2244S/SA/SB....85 or fewer (48 or fewer per surface)
    M2245S/SA/SB...120 or fewer (48 or fewer per surface)
    M2246S/SA/SB...171 or fewer (48 or fewer per surface)
     The maximum defect length is 32 bytes.


 Controller circuit
 ------------------
 Imported functions are listed below:

 - Data buffer (8 KB x 2)

 - SCSI protocol control an ddata transfer control

 - Sector format control

 - ID register

 - SERDES

 - ECC

 - Data comparision and data error correction

 - Error recovery and self diagnostic


 Reformatting
 ------------
 At the installation time, it is not necessary to initialize the disk
 medium if the sector interleaving feature is not used, because the
 IDDs have already initialize (formatted) with no sector interleaving
 at shipment.

 If it required to use the sector interleaving, or to change the
 sector size, the IDD must be reformatted according to the following
 procedure at the installation.

 1) Connect the IDD to be reformatted to the system.

 2) If it is required to change the sector size (data block length),
    issue a Mode Select command that specifies the new data block
    length as shown in the following table, prior to step 3).

           +-----------------+              +-------------------+
           |      CDB        |              |     Parameter     |
           +-----------------+              +-------------------+
    Byte 0 |      X'15'      |       Byte 0 |      X'00'        |
           +-----------------+              +-------------------+
         1 |0 0 0 1 0 0 0 0  |            1 |      X'00'        |
           +-----------------+              +-------------------+
         2 |      X'00'      |            2 |      X'00'        |
           +-----------------+              +-------------------+
         3 |      X'00'      |            3 |      X'08'        |
           +-----------------+              +-------------------+
         4 |      X'0C'      |            4 |      X'00'        |
           +-----------------+              +-------------------+
         5 |      X'00'      |            5 |      X'00'        |
           +-----------------+              +-------------------+
                                          6 |      X'00'        |
                                            +-------------------+
                                          7 |      X'00'        |
                                            +-------------------+
                                          8 |      X'00'        |
   +-------------------------------+        +-------------------+
   |X'000100' for  256 bytes/sector| +--  9 |Block Length (MSB) |
   +-------------------------------+ |      +-------------------+
   |X'000200' for  512 bytes/sector+>|   10 |Block Length       |
   +-------------------------------+ |      +-------------------+
   |X'000400' for 1024 bytes/sector| +-- 11 |Block Length (LSB) |
   +-------------------------------+        +-------------------+

 3) Issue a Format Unit command with the desired Interleaving Factor.


        Format unit command for reformatting
        ------------------------------------
                   +-----------------+
                   |      CDB        |
                   +-----------------+
            Byte 0 |      X'04'      |
                   +-----------------+
                 1 |0 0 001 0 0 0 0  |
                   +-----------------+
                 2 |      X'00'      |
                   +-----------------+
                 3 |      X'00'      |
                   +-----------------+
                 4 |Interleave Factor|
                   +-----------------+
                 5 |      X'00'      |
                   +-----------------+

 The disk medium is reformatted with the specified block length and
 interleaving factor, and the alternate block assignment for the
 medium defect is performed according to the Primary Defect list.


 Sector Interleaving
 -------------------
 Sector interleaving enables the data transfer rate required on SCSI
 during read or write operation of contiguous blocks to be decreased.
 The Format unit command permits a sector interval between blocks to
 be specified as an interleaving factor. The user need not be concern-
 ed with correspondences of blocks with their physical sector
 locations, because any data access after the completion of formatting
 is performed in accordance with the block arrangement.


 Data buffer
 -----------
 IDD contains 16 KG data buffer to improve the total system
 throughput.


 Low power consumption
 ---------------------
 The power consumption is 32 W (typical). This low power consumption
 enables the unit to be used in a wide environmental temperature
 range (5*C to 45*C) without a cooling fan.


 Low noise and low vibration
 ---------------------------
 The IDD's low noise input, approx. 45 dB (A-scale weighting) even
 during seeking, makes it ideal for office use.
 The IDD has four rubber vibration isolators, which minimize the
 transfer of motion.


 Start and stop time
 -------------------
 Start time is 20 seconds or less, and stop time is 15 seconds or less
 using dynamic braking to prevent disk and head wear.


 Reliability
 -----------
 Mean Time Between Failures (MTBF)
 The estimated MTBF of theIDD during its life time is 30,000 hours
 after an initial 3-month period.

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

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


 Spindle Motor
 -------------
 The disk turned by a direct-drive DC motor. The motor attains a very
 precise rotational speed of 3600 rpm,   1%. This precision is
 achieved through a feedback circuit which includes Hall-effect
 elements mounted within the motor assembly.


