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Fujitsu M2249SB Specifications
Model Capacity Size Height Bus Type Int.Type
Fujitsu M2249SB 343MB 5.25" FHT SCSI1 SE

NO MORE PRODUCED                                      Native|  Translation
Form                 5.25"/FH              Cylinders    1243|     |     |
Capacity form/unform   327/  371 MB        Heads          15|     |     |
Seek time   / track  18.0/ 4.0 ms          Sector/track   19|     |     |
Controller           SCSI1 SINGLE-ENDED    Precompensation
Cache/Buffer            16 KB              Landing Zone
Data transfer rate          MB/S int       Bytes/Sector     1024
                      2.500 MB/S ext SYNC
Recording method     RLL 1/7                        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          40.0 W     Rotation   RPM      3600
       read/write         W     Acoustic   dBA        45
       spin-up            W     ECC        Bit   32
                                MTBF         h      30000
                                Warranty Month
Lift/Lock/Park     YES          Certificates                                  


FUJITSU M2247/M2248/M2249-S/SA/SB OEM MANUAL 41FH5023E-02

  |                                *  *  *  *         +-++-+|| CN5
  |                               L0 L1 L2 L3         |RM57||+-+
  |  +---+CN104                                       +*++*+|XX
  |  +---+CN105                             2+-+1           |XX
  |  +---+CN106                              | CN2          |XX
  |  +---+                                   | |            |XX 50 Pin
  |                                        10+-+9           |XX
  |           1+--------+15      15+-+16    1+---------+15  |XX
  |           2+-CNH102-+16        | CN4    2+---------+16  |XX
  |           1+--------+15        | |           CN3        |XX
  |           2+-CNH101-+16       1+-+2                     |XX
  |                                                         |XX
  |                          1+-----9++1-------+15          |XX
  |  1+--------+15           2+CNH106++-CNH105-+16          | 1
  |  2+-CNH103-+16                                          |
  |               1+--------+15                             |XX Power
  |               2+-CNH104-+16                             |XX


FUJITSU M2247/M2248/M2249-S/SA/SB OEM MANUAL 41FH5023E-02

Jumper Settings


x = Jumpers are set from factory


The user MUST NOT change the setting of terminals not described in
this section. Do not connect or disconnect connectors or change
terminals except for CN3/CN9 when power is on!


Setting plugs and switch are set as follows when shipped from the


CN3 11-12, 13-14, 15-16
CN5 4 ON, 5 ON
CNH104 3-4
CNH105 15-16


CN5 SCSI ID setting


         SCSI ID| CN5 | CN5 | CN5 |
                | SW3 | SW2 | SW1 |
 x         0    |OFF  |OFF  |OFF  | Set the SCSI ID so that there are
           1    |OFF  |OFF  |ON   | no duplicates between SCSI devices
           2    |OFF  |ON   |OFF  | on the same SCSI bus.
           3    |OFF  |ON   |ON   |
           4    |ON   |OFF  |OFF  | The priority of SCSI bus ARBITRA-
           5    |ON   |OF   |ON   | TION phase is determined by SCSI
           6    |ON   |ON   |OFF  | ID as follows: 7>6>5>4>3>2>1>0
           7    |ON   |ON   |ON   |

 CN5  SCSI bus parity
 x     SW4   ON      SCSI data bus parity check by the IDD executed
       SW4   OFF     Not executed

 CN5  Arbitration option setting
 x     SW5   ON      Enable
       SW5   OFF     Disable

If the arbitration phase is disabled, the Disconnect/Reconnect func-
tion on SCSI is inhibit.


 CN5  Disable Synchronous Mode Transfer
       SW7   ON      Inhibit
 x     SW7   OFF     Permit

Data transfer rate with the synchronous mode transfer depends on
REQ/ACK Offset, Transfer Period, and response time of ACK pulse from
the INIT.


 CN5  Diag Switch
 x     SW8   OFF     Stop (Normal Mode)
       SW8   ON      Execute (Diagnostic Mode)

 CN4   Unit Attention Condition

CN3 SCSI terminating resistor power
x 11-12 CLOSE From TERMPWR Pin and IDD (To TERMPWR Pin)
x 13-14 CLOSE


       11-12 OPEN    From IDD
       13-14 CLOSE

       11-12 CLOSE   From TERMPWR Pin
       13-14 OPEN

The table shows, how to supply power to the IDD SCSI terminating re-
sistor module and how to use TERMPWR lines on the SCSI bus. When the
IDD connects to a position other than at either end of the SCSI cable
do not mount the terminating resistor modules on the IDD.


       |                     +------ CN3 ------+   -+- +5V DC|
      +++                    |11 12    14   13 |    |        |
        | TERMPWR            +-+--+-----+----+-+    + Diode  |
      S *----------------------+  |     |    +------+        |
      C |                         +-----+----+               |
      S |                             +------+-----+         |
      I *-----------------------------+ Terminator |         |
        | SIGNAL                      | Circuit    |         |
      +++                             +------+-----+         |
       |                                     + GND           |

 CN3   Front panel LED indication
 x     15-16 CLOSE   Seek complete and SCSI accessing
       15-16 OPEN    Seek complete

 CNH105  Drive type setting
              |M2247|M2248|M2249| The settings of pins 11 to 14 of
       -------+-----+-----+-----+ CNH105 indicates the IDD model types
       11-12  |OPEN |CLOSE|OPEN |
       -------+-----+-----+-----+ The user must not change this set-
       13-14  |OPEN |OPEN |CLOSE| tings.

 CNH105  Spindle motor after POWER ON
 x     15-16 CLOSE   Rotate
       15-16 OPEN    Not Rotate

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


 | L3 | L2 | L1 | L0 |
 +----+----+----+----+---------+      IDD state
 |RED |   AMBER      | COLOR   |
 |OFF |OFF |OFF |OFF |Operating
 |OFF |OFF |OFF |ON  |Idle (IDD ready)
 |OFF |OFF |ON  |ON  |In diagnostics
 |OFF |OFF |ON  |OFF |Drive error has been detected during diagnosis
 |OFF |ON  |OFF |OFF |ROM error has been detected during diagnosis
 |OFF |ON  |OFF |ON  |RAM error has been detected during diagnosis
 |OFF |ON  |ON  |OFF |Register error has been detected during diagnos
 |OFF |ON  |ON  |ON  |Buffer error has been detected during diagnosis
 |ON  |OFF |OFF |OFF |Drive hard error has been detected
 |ON  |OFF |OFF |ON  |Spindle motor revolutions fewer than 90%
 |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  |OFF |Write fault
 |ON  |ON  |ON  |ON  |Controller hard error


FUJITSU M2247/M2248/M2249-S/SA/SB OEM MANUAL 41FH5023E-02

Notes on installation


 Installation direction
     horizontally                          vertically
    +---------------+                  +--+                  +--+
    |               |                  |  +-----+      +-----+  |
    |               |                  |  |     |      |     |  |
 +--+---------------+---+              |  |     |      |     |  |
 +----------------------+              |  |     |      |     |  |
                                       |  |     |      |     |  |
      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.


Never install PCA to the top!


Ambient temperature
When the IDD is operating, the ambient temperature measured 3 cm from
the Disk Enclosure (DE) surface and from the PCA surface must satisfy
the specified requirements.


Multi-drive connection
Host systems, IDDs and other SCSI controllers are connected (daisy
chained) to SCSI provided that the total number of connected SCSI
devices is a maximum of eight.


SCSI cable
The total length of SCSI interface cable must be shorter than 7m.


A characteristic impedance of 100 10% is recommended for unshielded
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 dif-
ferent 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.


Check, that system power is off before connecting or disconnecting


Be carefull of the insertion directions of the SCSI connectors. With
the system in which terminating resistor power is supplied via the
SCSI cable, if the drive power is turned on, the overcurrent protec-
tion fuse of the terminating resistor power supplier may be blown or
the cable may be burnt if overcurrent protection is not provided.


All SCSI devices on one bus are daisy-chained with a SCSI cable. A
terminating resistor must be mounted in the SCSI device at each end
of the SCSI cable.


Since a SCSI terminating resistor module is mounted in the IDD on
shipment, it must be removed when the IDD is not connected at either
end of the SCSI cable. Also, a method for the power supply to the
terminating resistor must be selected with the setting terminal on
the IDD.


When connecting the IDD to either end of the SCSI cable, do not de-
mount the terminating resistor module.
When connecting the IDD to a position other than both ends of the
SCSI cable, demount terminating resistor modules.


 SCSI cable                   SCSI cable
 ----------++-------+         ----------++-------++-------X TERM
       +---++--+ +-xxx---+          +---++--+ +--++---+
       |       | | TERM  |          |       | |       |
       |       | |       |          |       | |       |
       |  IDD  | |  IDD  |          |  IDD  | |  IDD  |
       +-------+ +-------+          +-------+ +-------+
            Correct                     Correct

 SCSI cable                   SCSI cable
 ---------+                   ----------++-------X TERM
       +-xxx---+                    +--xxx--+
       | TERM  |                    |  TERM |
       |       |                    |       |
       |  IDD  |                    |  IDD  |
       +-------+                    +-------+
        Correct                     INCORRECT!

When removing the terminating resistor module from the socket, be
careful not to damage the resistor module pins, mount socket and
contiguous parts.
When mounting the terminating resistor moudle, check the mounting
direction and whetherthe module is fixed.


      +- Marker shows pin 1            +- Marker shows pin 1
      |                                |
      |  +-----------------+           |
      |  |* * * * * * * * *|           |  +*-*-*-*-*-*-*-*-*+
      +- *                 |           +- * Resistor        |
         |* * * * * * * * *|              +*-*-*-*-*-*-*-*-*+
         Socket, terminating resistor
         module not present

 Sequential starting of spindle motors
 After the power is turned on to the IDD, a large amount of current
 flows in the +12 V DC line when the spindle motor rotation starts.
 Therefore, if more than one IDD is used, the spindle motors should
 be started sequentially using one of the following procedures:

 1. Issue START/STOP UNIT commands at 20-second intervals to start
    the spindle motors.
 2. Turn on the +12 V DC power in the power supply unit at 30-second
    intervals to start the spindle motors sequentially.

Noise filter
To eliminate AC line noise, a noise filter should be installed at the
AC input terminal on the IDD power supply unit.
Attenuation: 40 dB or more at 10 MHz.
Circuit configuration: T type


Operator panel connector
The operator panel connector provides for optional connection of
write protect switch.


         +-- CN105        CN106|Signal|Definition
    +---+-+---+           -----+------+---------------
    |3 1|1|3 1|              1 | + 5V | + 5V
    |4 2|2|4 2|           -----+------+---------------
  --+---+-+---+--            2 |   0V | Ground
    CN104 CN106           -----+------+---------------
                            3  |FPTCT |Write protect
  view from cable         -----+------+---------------
  side of connector         4  |CMDCMP|Ready indicator


FUJITSU M2247/M2248/M2249-S/SA/SB OEM MANUAL 41FH5023E-02

SCSI interface
The interface between the host system and the IDD meets SCSI standard
The following extended features are also provided:


                 Synchronous data transfer with 2.5MB/s transfer rate

Command set
All of SCSI mandatory commands and extended commands are provided and
the command set meets the SCSI CCS requirements. In addition, power-
ful Vendor Unique Commands have been provided to improve data hand-
ling capability.
These commands can manipulate data through logical block addressing
independent of the physical characteristics of the IDD.


Command queuing
IDD can accept multiple commands from multiple hosts.


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


Mean Time Between Failures (MTBF)
The estimated MTBF of the IDD 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.


Power loss
Integrity of the data of the disk is guaranteed against all forms of
abnormal DC power failure except a power failure during writing.


Media defects
Cylinder 0, Head 0 and 1 are error free.


M2247S/SA/SB Fewer TBD
M2248S/SA/SB Fewer TBD
M2249S/SA/SB Fewer TBD


The maximum defect length is 32 byte.


Sector interleaving
Sector interleaving enables the data transfer rate required on SCSI
during read or write operation of continuous blocks to be decreased.


To use sector interleaving, the user must reformat the disk drive by
a Format Unit command. The Format Unit command permits a sector in-
terval between blocks to be specified as an interleaving factor. The
user need not be concerned with correspondences of blocks with their
physical sector locations, because any data access after the comple-
tion of formatting is performed in accordance with the block arran-


 In sector interleaving mode, the data blocks in a drive are accessed
 at intervals of (m) sectors, where (m) is determined by the inter-
 leaving factor. In read/write operations on continuous blocks in the
 sector interleaving mode, the data buffer helps decrease data trans-
 fer rate required in SCSI. The data transfer rate in SCSI required
 to maintain continuous block processing without unexpected revolu-
 tion delay when the interleaving factor is (m) can be determined by
 the following expression:
                                    1.25MB/s   x   data field length
 SCSI average data transfer rate   ----------------------------------
                                    physical sector length   x   (m)

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