Seagate ST1156a Swift HARD DISK DRIVE REPAIR, Seagate ST1156a Swift HARD DISK DRIVE SPECIFICATIONS,
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Seagate ST1156a Swift Hard Disk Drive Repair, Seagate ST1156a Swift Hard Disk Drive Specifications, Seagate ST1156a Swift Seagate ST1156A Swift
Specifications



seagate st1156a swift picture.
seagate st1156a swift picture.
seagate st1156a swift picture.

Seagate ST1156A Swift Specifications
Model Capacity Size Height Bus Type Int.Type
ST1156A Swift 138MB 3.5" HHT IDE AT

Swift AT   :    ST1156A

Swift AT

Capacity: 
Speed: 
Average Read Time: 
 Cylinders: 
Heads: 
Sectors: 

138.0 MB
3600 rpm
15 ms
536
14
36


ST-1156A (94354-155) Swift AT (IDE)
     ����\
     � O �  5
     � O �  G                                          �Ŀ  Some have
     � O �  G       AT (IDE) Cable                     � �� these pins
     � O � 12  1�........................�   o o o o o(o o)  6 on
     ����/       ........................    o o o o o(o o)  7 off
    �������������������������������������������������������
                                             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  ��������


                             ST-1156A
                          94354-155 Swift

       UNFORMATTED CAPACITY (MB) ________________155
       FORMATTED CAPACITY (36 SECTORS) (MB) _____138
       ACTUATOR TYPE ____________________________VOICE COIL
       TRACKS ___________________________________7,504
       CYLINDERS ________________________________1,072
       HEADS ____________________________________7
       DISCS ____________________________________4
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________RLL
       TRANSFER RATE (mbytes/sec) _______________1.25
       SPINDLE SPEED (RPM) ______________________3,600
       BUFFER ___________________________________32 or 64 Kbyte
         Read Look-Ahead, Non-Adaptive,
         Single-Segmented
       INTERFACE ________________________________AT BUS
       TPI (TRACKS PER INCH) ____________________1,350
       BPI (BITS PER INCH) ______________________28,103
       AVERAGE ACCESS (ms) ______________________15
       SINGLE TRACK SEEK (ms) ___________________4
       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:    536 cyl, 14 heads, 36 sectors = 138,313,728
Possible translation:    536 cyl,  9 heads, 56 sectors = 138,313,728
Possible translation:    993 cyl, 16 heads, 17 sectors = 138,289,152
Possible translation:    742 cyl, 14 heads, 26 sectors = 138,285,056

Note: A "custom" or "user-defined" 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)


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