
M X T - 1 2 5 0 S N    MAXTOR
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/HH               Cylinders    2389|     |     |
Capacity form/unform  1240/ 1524 MB        Heads          15|     |     |
Seek time   / track   8.5/ 1.8 ms          Sector/track     |     |     |
Controller           SCSI1 NOVELL          Precompensation
Cache/Buffer           256 KB              Landing Zone
Data transfer rate          MB/S int       Bytes/Sector      512
                     10.000 MB/S ext SYNC
Recording method     RLL 1/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         5 55    |    -40 65
Power: sleep              W     Humidity     %         5 95    |      5 95
       standby            W     Altitude    km    -0.305  3.048| -0.305  3.048
       idle               W     Shock        g         3       |     50
       seek               W     Rotation   RPM      6300
       read/write    21.0 W     Acoustic   dBA        35
       spin-up            W     ECC        Bit   88,REED SOLOMON
                                MTBF         h     300000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     CSA,FCC,IEC380,TUV,UL478


**********************************************************************
                        L   A   Y   O   U   T
**********************************************************************
MAXTOR   MXT-1240S  OEM TECHNICAL MANUAL 1028044 REV. A

  +---------------------------------------------------------+
  |      JP5+--+ +-+JP4       +-----+J7          JP8        |XX
  |         |  | +-+          1-----+           +---+   ++  |XX
  |+-+      +--1                                +---+   ||  |XX
  || |J4                                             RN2||  |XX
  |+-+                                                  ||  |XX
  |+-+   +--+JP2                                        +1  |XX J1
  || |   +--1                                           ++  |XX
  || |J2                                             RN1||  |XX
  || |                                                  ||  |XX
  || |                             +-+JP1               ||  |XX
  || |                             +-+                  +1  |XX
  |+-+                                           +J6----+   |XX
  |                                              1------+   |XX
  | +-+                                                     |X1
  | | |J5                                                   |
  | +-+                                                     |XX Power
  |                                                         |XX
  +---------------------------------------------------------+






    Tailgate PCB for Differential SCSI

          /--------------DRIVE-------------------------------------
        /                                                       / |
      /                                                       /   |
    +--------------------------------------------------------+    |
    |   XXXXXXXX    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX          |    |
    | 4 Pin male DC                 Male SCSI on Drive PCB   |    |
    | connector on Drive PCB                                 |    |
    |          +-------------------------------------------+ |    |
 4 female DC connector +----------------------------+Female|SCSI on
   XXXXXXXXX   |       +----------------------------+back side of |
    | | | |    |                                     tailgate PCB |
 +--+-+-+-+----+                                           | |    /
 | ++-+-+-++                                               | |  /
 | +-------+                 +---JP1                       | |/
 |                           |   |SCSI ID                  +-+
 |                           +---+                         |
 |                                                         |
 |                                                         |
 | J4                      J3                              |
 | XXXXXXXXX        XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX        |
 +---------------------------------------------------------+
   Male Connector       Male SCSI Connector to SCSI Bus
   for Power Supply



**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
MAXTOR   MXT-1240S  OEM TECHNICAL MANUAL 1028044 REV. A

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

 x = Jumper set at factory


 J3  Power Connector
 -------------------
  ----+------------+   pin 1    +12 VDC
      | 4  3  2  1 |   pin 2    +12 Volts Return
  ----+------------+   pin 3    + 5 Volts Return
                       pin 4    + 5 VDC


 J4  Service Connector Pin Assignment
 ------------------------------------
     ----+------+------+------+------+------+---PCB
         |Pin 2 |Pin 4 |Pin 6 |Pin 8 |Pin 10|
         |CNMI  |DTR   |GND   |SPDL  |-LED  |
         |      |      |      |Pu.REF|DRV   |
         +------+------+------+------+------+
         |Pin 1 |Pin 3 |Pin 5 |Pin 7 |Pin 9 |
         |GND   |DTX   |GND   |N/C   |+ 5V  |
         |      |      |      |      |      |
         +------+------+------+------+------+
 When an LED is connected to pins nine and ten, it functions in the
 same manner as the LED which is mounted on the disk drive's face-
 plate. This is typically used in cases when the drive is mounted in a
 position where the LED is not visible or the faceplate is removed.

 Pins three (transmit data, DTX) and four (receive data, DTR) are the
 main communication lines. Pin two is for factory use only. Pins five
 and six are signal ground lines. Pin eigth is used to synchronize the
 spindles in multiple drive applications.



 J6  SCSI ID Setting
 -------------------
        +----------+
        | 9 7 5 3 1|
        |10 8 6 4 2|
        +----------+

 +--------+----------+-------+-------+-------+
 |SCSI ID | Priority | 5 & 6 | 3 & 4 | 1 & 2 |
 +--------+----------+-------+-------+-------+
 |   0    | Lowest   |OPEN   |OPEN   |OPEN   |
 |   1    |   .      |OPEN   |OPEN   |CLOSED |
 |   2    |   .      |OPEN   |CLOSED |OPEN   |
 |   3    |   .      |OPEN   |CLOSED |CLOSED |
 |   4    |   .      |CLOSED |OPEN   |OPEN   |
 |   5    |   .      |CLOSED |OPEN   |CLOSED |
 |x  6    |   .      |CLOSED |CLOSED |OPEN   |
 |   7    | Highest  |CLOSED |CLOSED |CLOSED |
 +--------+----------+-------+-------+-------+
                       (MSB)           (LSB)

 SCSI ID jumpers (pins one through six on J6) are provided to con-
 figure each disk drve with a SCSI device ID for use in multiple SCSI
 device configurations.

 An ID of seven is the highest priority in a multiple device
 configuration, and is usually used by the initiator.

 The disk drive is shipped from the factory with an ID of six. This
 assures that sufficient jumpers are available for any address except
 seven, which is usually reserved for the host system.


 J6 Parity
 ---------
 x  7-8  CLOSED  Enables Parity detection
         OPEN    Disables Parity detection

 Parity detection can be disabled by removing the jumper from pins
 seven and eight of J6. Odd parity detection is incorporated by the
 disk drive. Odd parity is always generated.



 J6  Drive Spin-Up Options (spin with power)
 -------------------------------------------
  x  9-10  CLOSED   Start when power is applied
           OPEN     Wait for START Command

 Wait for START Command:  With no jumper pins nine and ten of J6, the
 disk drive does not spin up until the initiator issues a START/STOP
 UNIT (1Bh) command with the start bit set to one.

 Start When Power is Applied: When pins nine and ten of J6 are
 jumpered, the motor starts as soon as power is applied. The disk
 drive is shipped in this configuration.



 J7  Single Ended or Differential
 --------------------------------

 Single Ended       Differential
      +---+           +---+
    12|o o|11       12|xxx|11
    10|o o|9        10|xxx|9
     8|o o|7         8|xxx|7
     6|o o|5         6|xxx|5
     4|xxx|3         4|o o|3
     2|o o|1         2|xxx|1
      +---+           +---+

 xxx = CLOSED

 The SCSI bus signals may be either single ended or differential. If a
 single ended signal is desired, configure J7 so that pins 3 and 4 are
 jumpered and all other pins are not.

      JP1 +-----------------+ SCSI ID on Tailgate PCB, Differential
          |6 o     o 5 (MSB)|
          |4 o     o 3      |
          |2 o     o 1 (LSB)|
          +-----------------+

 If a differential signal is desired, an optional "tailgate" PCB must
 be added to the drive. The tailgate PCB must have JP1 configured
 for the same ID as the disk drive. Additionally J7 (drive PCB) must
 have jumpers on pins 1 and 2, 5 and 6, 7 and 8, 9 and 10, and 11 and
 12, while pins 3 and 4 should not have a jumper.


 JP2/JP4/JP5  Test
 -----------------
 JP2, JP4 and JP5 are used during the manufacturing process for
 testing. After testing, the disk drive is shipped with JP4, the
 write protect jumper, installed, which write enables the drive.
 Removal of this jumper write protects the drive.


 JP8  Terminator Power Selection
 -------------------------------
 x    CLOSED  Terminator Power to the SCSI bus is protected by a fuse
              (1A) installed on the PCB.
      OPEN    The drive is prevented from supplying termination power
              to the SCSI bus.

 Power to the terminators may come internally from the disk drive or
 externally from the SCSI bus.

 The drive electronics are capable of sensing if the host is providing
 power to the terminators. If the host is not providing power, the
 disk drive automatically provides power to the terminators via a
 regulated (active) power source.

 The function of JP8 is the same for the single ended and differential
 versions.


