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                         SEAGATE TECHNOLOGY, INC.
                              1-800-SEAGATE
                          http://www.seagate.com
                            (C)opyright 1991



ST-4085 (94155-86) Wren 2 ST412 MFM

      Drive Sel  ÚÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
      o o o o o  ³   Term     1³
      o o o o o  ³ 14 pin dip  ³                      ÚÄÄÄÄÄÄÄÄÄ¿
                 ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÙ                      ³ O O O O ³ Power
      1 2 3 4 Radial                                  \ÄÄÄÄÄÄÄÄÄ/
                           Command ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿1  12 G G 5
     ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍØÍÍÍÍÍÍÍÍÍÍÍÍÍ ÍØÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ
         Data   ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿1  ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
     ÍÍÍÍÍÍÍÍÍÍÍØÍÍÍÍÍÍÍÍÍÍÍÍ ÍØÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ
                ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ

                              ST-4085
                        94155-85 WREN 2 FH

       UNFORMATTED CAPACITY (MB) ________________85
       FORMATTED CAPACITY (17 SECTORS) (MB) _____71
       ACTUATOR TYPE ____________________________VOICE COIL
       TRACKS ___________________________________8,192
       CYLINDERS ________________________________1,024
       HEADS ____________________________________8
       DISCS ____________________________________5
       MEDIA TYPE _______________________________OXIDE
       RECORDING METHOD _________________________MFM
       TRANSFER RATE (mbits/sec) ________________5.0
       SPINDLE SPEED (RPM) ______________________3,600
       INTERFACE ________________________________ST412
       TPI (TRACKS PER INCH) ____________________980
       BPI (BITS PER INCH) ______________________9,400
       AVERAGE ACCESS (ms) ______________________28
       SINGLE TRACK SEEK (ms) ___________________5
       MTBF (power-on hours) ____________________40,000
       POWER REQUIREMENTS: +12V START-UP (amps) _4.5
                           +12V TYPICAL (amps) __2.0
                           +5V START-UP (amps) __1.3
                           +5V TYPICAL (amps) ___0.75
                           TYPICAL (watts) ______28
                           MAXIMUM (watts) ______61
       BUFFERED STEP PULSE RATE (micro sec) _____8-200
       WRITE PRECOMP (cyl) ______________________N/A (or 128 for
                                                 the "85P" version)
       REDUCED WRITE CURRENT (cyl) ______________N/A (1024)
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________45, *

 * 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)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/mfm/st4085.txt.