                         SEAGATE TECHNOLOGY, INC.
                              1-800-SEAGATE
                          http://www.seagate.com
                            (C)opyright 1996


ST-3420A, Filepro 420 AT (Bobcat CFS420A)

  ЩЭЭЭЭЭЭЭЭЭЭЭЛ
  К REAR VIEW К
  ШЭЭЭЭЭЭЭЭЭЭЭМ

 Optional Mini Power
 Power Connector      J2 40 pin I/O Cable Connection
    кФСФП             Г
    G   5  еЭЭЭЭЭЭЭЭЭ  ЭЭЭЭЭЭЭЭЭИ /ФФФФФФФФФ\    TOP (HDA)
  ЭЕ0 0 0ЦЭЕ::::::::::њ::::::::1ЦЭГ 0 0 0 0 ГЭЭ
      12   дЭЭЭЭЭЭЭЭЭЭГЭЭЭЭЭЭЭЭЭО РФ5ФGФGФ12й    BOTTOM
                      Г
                      РФФФ pin-20 removed


     ST-3420A
  ЩЭЭЭЭЭЭЭЭЭЭЭЭЭЭЛ
  К  Front View  К              кФФФФ  Compatibility Mode
  ШЭЭЭЭЭЭЭЭЭЭЭЭЭЭМ              Г        ATA ON, ISA OFF
                                Г
                                Г кФФ  Master ON, Slave OFF (C/D)
                                Г Г
    (TOP)         o o o o o   o o o1
Option Block   ЭЭЭ  o o o o   o o o2ЭЭЭЭЭЭЭЭЭЭЭЭЭЭЭЭЭЭЭЭ
   (BOTTOM)       РФФФТФФФй   Г
                      Г       Г
          Reserved ФФФй       Г
              Reserved  ФФФФФФй


                             ST-3420A
                    Filepro 420 AT (Bobcat CFS420A)

       FORMATTED CAPACITY _______________________426.8
       ACTUATOR TYPE ____________________________VOICE COIL
       CYLINDERS __PHYSICAL______________________2388
       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) _______20 to 32
       EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 7.5
       PIO MODE _________________________________
       DMA SUPPORT ______________________________EISA Type B
       SPINDLE SPEED (RPM) ______________________3600
       AVERAGE LATENCY (mSEC) ___________________8.33
       BUFFER ___________________________________32K
        Read/Write Multiple, Read Look-Ahead,
        Multi-Segmented
       INTERFACE ________________________________ATA
       SECTORS PER DRIVE (LBA mode) _____________
       TPI (TRACKS PER INCH) ____________________2774
       BPI (KBITS PER INCH) _____________________58,566
       AVERAGE ACCESS (ms) ______________________14
       SINGLE TRACK SEEK (ms) ___________________3
       MAX FULL SEEK (ms) _______________________25
       MTBF (power-on hours) Office _____________250,000
       SHOCK (G's):
                operating (Read/Write) __________5
                abnormal ________________________
                nonoperating ____________________75
       ACOUSTICS (bels) (typ/max) _______________43/
       POWER DISSIPATION (watts) ________________
       POWER REQUIREMENTS: +12V START-UP (amps) _1.2
       POWER MANAGEMENT (Watts):
                           ACTIVE _______________5.7
                           IDLE _________________3.8
                           STANDBY ______________1.4
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________AUTO
       IBM AT DRIVE TYPE ________________________*

       Physical:
                        Height (inches/mm):  1.00/25.4
                        Width  (inches/mm):  4.00/101.6
                        Depth  (inches/mm):  5.75/146.1
                        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: 826 cyl, 16 heads, 63 sectors = 426,295,296


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)".

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. (02/21/96)