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-1186A (94354-186) Swift AT (IDE)
    ����\
    � 0 �  5
    � 0 �  G                                          �Ŀ  Some have
    � 0 �  G       AT (IDE) Cable                     � �� these pins
    � 0 � 12  1�........................�   o o o o o(o o)
    ����/       ........................    o o o o o(o o)
   �������P�W�A�������������������������������������������
                                            1 2 3 4 5 6 7
        ON                 OFF              � � � � � ���
   1   Slave              Master          ��� � � � �  �
   2   5 Heads            7/9 Heads       ����� � � �  �
   3   Slave installed    Slave not inst. ������� � �  �
   4   7 byte ECC         4 byte ECC      ��������� �  �
   5   Factory test       Normal Oper.    �����������  �
   6/7 Some PWA's have these pins, factory use  ��������



SWIFT Shrouded AT Interface Connector Only
    ����\
    � 0 �  5   �� If the AT Connector has a plastic shroud, note pin-1
    � 0 �  G   �        � Pin-20 missing for keying purposes
    � 0 �  G   �        �
    � 0 � 12  ��������������������͸     o o o . o o
    ����/     �:::::::::�:::::::::1�     o o o . o o    (Note: 8-pin jumper
    ����P�W�A����������������������������������������    block on side of
                                         1 2 3 4 5 6     drive for factory
     ON                 OFF              � � � � � �     use only.)
1   Slave              Master          ��� � � � � �
2   Slave installed    Slave not inst. ����� � � � �
3   SPSYNC (spindle sync) on Pin-28 ���������� � � �
4   (pins removed) ����������������������������� � �
5   Spare ���������������������������������������� �
6   SPSYNC External Connection ���������������������


                            ST-1186A
                        94354-186 Swift

      UNFORMATTED CAPACITY (MB) ________________186
      FORMATTED CAPACITY (36 SECTORS) (MB) _____164
      ACTUATOR TYPE ____________________________VOICE COIL
      TRACKS ___________________________________8,904
      CYLINDERS ________________________________1,272
      HEADS ____________________________________7
      DISCS ____________________________________4
      MEDIA TYPE _______________________________THIN FILM
      RECORDING METHOD _________________________RLL (2,7)
      TRANSFER RATE (mbytes/sec) _______________1.25
      SPINDLE SPEED (RPM) ______________________3,600
      AVERAGE LATENCY (mSEC) ___________________8.33
      BUFFER ___________________________________32 or 64 Kbyte
        Read Look-Ahead, Non-Adaptive,
        Single-Segmented
      INTERFACE ________________________________AT BUS
      SECTORS PER DRIVE ________________________320,040
      TPI (TRACKS PER INCH) ____________________1,350
      BPI (BITS PER INCH) ______________________28,103
      AVERAGE ACCESS (ms) ______________________15
      SINGLE TRACK SEEK (ms) ___________________4
      MAX FULL SEEK (ms) _______________________35
      MTBF (power-on hours) ____________________150,000
      POWER REQUIREMENTS: +12V START-UP (amps) _2.5
                          +12V TYPICAL (amps) __0.7
                          +5V START-UP (amps) __0.75
                          +5V TYPICAL (amps) ___0.4
                          TYPICAL (watts) ______11
                          MAXIMUM (watts) ______33.75
      BUFFERED STEP PULSE RATE (micro sec) _____6-200
      WRITE PRECOMP (cyl) ______________________N/A
      REDUCED WRITE CURRENT (cyl) ______________N/A
      LANDING ZONE (cyl) _______________________AUTO PARK
      IBM AT DRIVE TYPE ________________________*

* MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE.  ALSO, CHECK TO
SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE
AVAILABLE. (see below)

Possible translation:   636 cyl, 14 heads, 36 sectors = 164,118,528
Possible translation:   742 cyl, 12 heads, 36 sectors = 164,118,528
Possible translation:   636 cyl,  9 heads, 56 sectors = 164,118,528
Possible translation:   880 cyl, 14 heads, 26 sectors = 164,003,840

Note: A "custom" or "user-definded" CMOS drivetype  may ask for a
numerical value for the Write Precompensation cylinder and for the
Landing Zone cylinder.  A basic rule-of-thumb for drive models that do
not require the old Write Precomp technique or a Landing Zone because
they are Auto-Parking is to add 1 to the cylinder value being used. As
an example: If cylinders equaled 820, then both Write Precomp and
Landing Zone would be entered as 821. Some BIOS will convert this to
65535 or -1, which are functionally equivalent to "none (not used)".

PHYSICAL/LOGICAL equivalent to NATIVE/TRANSLATION

Already low-level formatted at the factory.

Since a User-definable or Custom translation geometry may be used, it
is imperative that the values be written down and kept with your
permanent records for retrieval in the event of CMOS battery failure.


                         Swift Remote LED Option

              Front View of Drive Without the Plastic Bezel

                                 �������Ŀ
                                 � A � B �    B = Anode
                                 �������Ĵ    D = Cathode
                                 � C � D �
             ...�������������������������������P�W�A���...


       � Default jumper at C-D for LED mounted on drive PWA
       � To use remote LED, remove jumper and extend B (Anode)
         and D (Cathode).
       � Swift LED kit 75912397 allows connection to a remote LED
       � Swift LED kit 95913369 has an LED for attachment to the
         system front bezel or a 5.25-inch frame kit

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