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-4144R ST412 RLL

                                                          �12�G�G�5Ŀ
                                                          � 0 0 0 0 �
 �Data Cable                    �Controller Cable   1     \�1�2�3�4�/
 ��������� ��                 �������������������� ���   ������������
              o o o o o o o o       1�����������Ŀ
              o o o o o o o o       ��������������
Drive Select->1 2 3 4 � � � �          �Resistor Termination Pack
                � � � � � � �
                � ��� � � � �
                �  �  � � � � Radial
                �  �  � � ��� Recovery Mode
                �  �  � ����� Write Fault
                �  �  ������� Not Connected
                �  ���������� Never Used (Drive Select 3 and 4)
                � If twisted cable, use Drive Select 2


                              ST - 4144R

       UNFORMATTED CAPACITY (MB) ________________144.0
       FORMATTED CAPACITY (26 SECTORS) (MB) _____122.7
       ACTUATOR TYPE ____________________________VOICE COIL
       TRACKS ___________________________________9,216
       CYLINDERS ________________________________1,024
       HEADS ____________________________________9
       DISCS ____________________________________5
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________RLL (2,7)
       TRANSFER RATE (mbits/sec) ________________7.5
       SPINDLE SPEED (RPM) ______________________3,600
       AVERAGE LATENCY (mSEC) ___________________8.3
       INTERFACE ________________________________ST412
       SECTORS PER DRIVE ________________________239,616
       TPI (TRACKS PER INCH) ____________________1,031
       BPI (BITS PER INCH) ______________________14,688
       AVERAGE ACCESS (ms) ______________________28
       SINGLE TRACK SEEK (ms) ___________________6
       MAX FULL SEEK (ms) _______________________55
       MTBF (power-on hours) ____________________40,000
       POWER REQUIREMENTS: +12V START-UP (amps) _4.0
                           +12V TYPICAL (amps) __1.3
                           +5V TYPICAL (amps) ___1.3
                           TYPICAL (watts) ______23
                           MAXIMUM (watts) ______55
       BUFFERED STEP PULSE RATE (micro sec) _____3-70
       WRITE PRECOMP (cyl) ______________________N/A (1025)
       REDUCED WRITE CURRENT (cyl) ______________N/A (1025)
       LANDING ZONE (cyl)________________________AUTO PARK
       IBM AT DRIVE TYPE ________________________*

 * 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)