ST-5850A (Decathlon 850 AT)

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  � REAR VIEW � Type A and Type B configurations
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         40 pin I/O Cable Connection
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    J1     ����������  ��������͸ /���������\    TOP (HDA)
     �����͵::::::::::�::::::::1�ͳ 0 0 0 0 ���
           ����������ͳ��������; ��5�G�G�12�    BOTTOM
                      �
                      ���� pin-20 removed

    ST-5850A
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 �  Front View  �  Type A configuration has 2x6 jumper block
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                 ��������������������� Slave drive ON (OFF for Master)
                 � ������������������� Slave Present (used on Master)
                 ��������������������� Cable Select pins 1-2 AND 3-4
                 � � ����������������� Dual-drive emulation pins 5-6 AND
  (TOP)          � � �   �              pins 9-10
                 � � �   � ����������� Spare jumper
                 � � �   � �
  J8             o o o o o o12
Option Block   �1o o o o o o ����������������������������PWA����������
                 �   � �
  (BOTTOM)       �   � ���� Remote LED (7-, 8+)
                 ���������� Master/Slave timing protocol changes to
                             PDIAG.  Makes the drive compatible with
                             some drives as the slave. Must be used
                             with pins 1-2 (Slave)

          Jumpers on 2-4 and 11-12 are spares, as shipped.


    ST-5850A
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 �  Front View  �  Type B configuration has 2x17 jumper block
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                 ��������������������� Slave drive ON (OFF for Master)
                 � ������������������� Slave Present (used on Master)
                 � � ����������������� Cable Select
                 � � � ��������������� Ext. Spindle Clock Synch
  (TOP)          � � � � ������������� Remote LED (9-, 10+)
                 � � � � � ����������� Reserved
                 � � � � � �   ��pin-16          �34
  J8             o o o o o o   o o o o o o o o o o
Option Block   �1o o o o o o o o o o o o o o o o o�������PWA����������
                             � � ��� ��� ���������
  (BOTTOM)                   � �  �   �     �
            pin-14 removed ��� �  �   �     ����� Reserved
              Spare Jumper �����  �   ����������� Spare Jumpers
      Dual-Drive Emulation ��������
      (requires two jumpers)

          Jumpers on 15-16, 21-22, 23-24 are spares.
          Dual-Drive Emulation requires jumpers on both 17-18 and 19-20.
          Cable Select also requires Slave and Slave Present jumpers ON.



                             ST-5850A
                             Decathlon 850

       UNFORMATTED CAPACITY _____________________
       FORMATTED CAPACITY (xx SECTORS) __________854.7
       ACTUATOR TYPE ____________________________VOICE COIL
       CYLINDERS __PHYSICAL______________________4,085
       HEADS ______PHYSICAL______________________4
       DISCS (3.5 in) ___________________________2
       MEDIA TYPE _______________________________THIN FILM
       HEAD TYPE ________________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (1,7)
       INTERNAL TRANSFER RATE (Mbits/sec) _______32.45 to 61.65
       EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 16.6
       PIO MODE _________________________________4
       DMA SUPPORT ______________________________EISA Type B
       SPINDLE SPEED (RPM) ______________________5,376
       AVERAGE LATENCY (mSEC) ___________________5.56
       BUFFER ___________________________________256 Kbyte SeaCache
        Read/Write Multiple, Read Look-Ahead,
        Multi-Segmented
       INTERFACE ________________________________AT
       SECTORS PER DRIVE (LBA mode) _____________1,669,260
       TPI (TRACKS PER INCH) ____________________4,250
       BPI (BITS PER INCH) ______________________69,355
       AVERAGE ACCESS (ms) ______________________12
       SINGLE TRACK SEEK (ms) ___________________3.5
       MAX FULL SEEK (ms) _______________________25
       MTBF (power-on hours) Office _____________500,000
       SHOCK (G's):
                operating (Read/Write) __________2
                nonoperating ____________________75
       ACOUSTICS (dBa) (typ/max) ________________30/38
       POWER DISSIPATION (watts) ________________
       POWER REQUIREMENTS: +12V START-UP (amps) _1.9
       POWER MANAGEMENT (Watts):
                           ACTIVE _______________7.0
                           IDLE _________________3.10
                           STANDBY ______________1.00
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________AUTO
       IBM AT DRIVE TYPE ________________________*

       Physical:
                        Height (inches/mm):     0.748/19
                        Width  (inches/mm):     4.00/101.6
                        Depth  (inches/mm):     5/127
                        Weight    (lbs/kg):     1.0/0.45


 * 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 translations:
                       This translation is generally acceptable, as
                       is, for non-DOS operating systems:
       1656 cyl, 16 heads, 63 sectors = 854,654,976

                       DOS operating systems may require a system bios
                       that accepts larger values for the CMOS head
                       parameter which lowers cylinders below 1024:
        828 cyl, 32 heads, 63 sectors = 854,654,976

                       Other FULL-CAPACITY solutions for DOS operating
                       systems include third-party drive preparation
                       software or bios driven host adapters. Otherwise,
                       capacity may be limited to:
        827 cyl, 16 heads, 63 sectors = 426,811,392 (Master)
        827 cyl, 16 heads, 63 sectors = 426,811,392 (Slave see Dual
                       Drive emulation jumper)

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
ZBR = Zone Bit Recording = Variable sectors per track

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.

Seagate reserves the right to change, without notice, product 
offerings or specifications. (5/14/95)