SEAGATE TECHNOLOGY, INC.
       Customer Technical Support FAX Network +1 408 438-8137
     Customer Technical Support Bulletin Boards (300-9600, 8-N-1)
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� United States    +1 408 438-8771 �  United Kingdom +44 628 478011  �
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� Germany         +49  89 140-9331 �  Singapore      +65   227-2217  �
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                            (C)opyright 1991



ST-151 ST412 MFM

                                                          /��Ŀ
                                                          � 0 �12
                                                          � 0 �G
                                                          � 0 �G
                                                          � 0 �5
               �Data Cable      �Controller Cable    1    \����
               ��������� ��    �������������������� ���   �������
                       o o o o o o o o �������������1
                       o o o o o o o o ��������������
                       � � � � 4 3 2 1    � Resistor Termination Pack
    (front corner)     � � � � �������
    �o Optional        � � � �    �
    �o LED             � � � �    ����� Drive Selects
       Connector       � � � ���������� Factory Test
                       � � ������������ Not Used
                       � �������������� Recovery Mode
                       ���������������� Radial


                              ST - 151

       UNFORMATTED CAPACITY (MB) ________________50.8
       FORMATTED CAPACITY (17 SECTORS) (MB) _____42.5
       ACTUATOR TYPE ____________________________VOICE COIL
       TRACKS ___________________________________4,885
       CYLINDERS ________________________________977
       HEADS ____________________________________5
       DISCS ____________________________________3
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________MFM
       TRANSFER RATE (mbits/sec) ________________5.0
       SPINDLE SPEED (RPM) ______________________3,600
       AVERAGE LATENCY (mSEC) ___________________8.33
       INTERFACE ________________________________ST412
       SECTORS PER DRIVE ________________________83,045
       TPI (TRACKS PER INCH) ____________________1,300
       BPI (BITS PER INCH) ______________________14,108
       AVERAGE ACCESS (ms) ______________________24
       SINGLE TRACK SEEK (ms) ___________________8
       MAX FULL SEEK (ms) _______________________44
       MTBF (power-on hours) ____________________150,000
       POWER REQUIREMENTS: +12V START-UP (amps) _2.0
                           +12V TYPICAL (amps) __0.45
                           +5V TYPICAL (amps) ___0.5
                           TYPICAL (watts) ______8
                           MAXIMUM (watts) ______27
       BUFFERED STEP PULSE RATE (micro sec) _____3-200
       WRITE PRECOMP (cyl) ______________________N/A (978)
       REDUCED WRITE CURRENT (cyl) ______________N/A (978)
       LANDING ZONE (cyl)________________________AUTO PARK
       IBM AT DRIVE TYPE ________________________17 or 11*

 * MAY REQUIRE A CONTROLLER WITH BIOS SUPPORT, OR FORMATTING
   AND PARTITIONING SOFTWARE.  ALSO, CHECK TO SEE IF YOUR CMOS SETUP
   HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE AVAILABLE.

Seagate reserves the right to change, without notice, product
offerings or specifications. (6/26/90)