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                         SEAGATE TECHNOLOGY, INC.
                              1-800-SEAGATE
                          http://www.seagate.com
                            (C)opyright 1995


ST-31270A (Medalist 1270)

  ÉÍÍÍÍÍÍÍÍÍÍÍ»
  º REAR VIEW º
  ÈÍÍÍÍÍÍÍÍÍÍͼ

                40 pin I/O Cable Connection J1
                ³
           ÕÍÍÍÍÍÍÍÍÍ  ÍÍÍÍÍÍÍÍ͸ /ÄÄÄÄÄÄÄÄÄ\    TOP (HDA)
     ÍÍÍÍÍ͵::::::::::ú::::::::1Æͳ 0 0 0 0 ³ÍÍ
           ÔÍÍÍÍÍÍÍÍÍͳÍÍÍÍÍÍÍÍ; ÀÄ5ÄGÄGÄ12Ù    BOTTOM
                      ³
                      ÀÄÄÄ pin-20 removed


   ST-31270A
 ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
 º  Front View  º
 ÈÍÍÍÍÍÍÍÍÍÍÍÍÍͼ

                        ÚÄÄÄÄÄÄÄÄÄÄÄÄÄ Master OFF, Slave ON pins 1-2
                        ³ ÚÄÄÄÄÄÄÄÄÄÄÄ Slave Present pins 3-4, used on Master
                        ÃÄÅÄÄÄÄÄÄÄÄÄÄÄ Cable Select pins 1-2 AND 3-4
                        ³ ³ ÚÄÄÄÄÄÂÄÄÄ Dual-drive emulation pins 5-6 AND
  (TOP)                 ³ ³ ³     ³     pins 11-12
                        ³ ³ ³     ³ ÚÄ Remote LED 13-, 14+
                        ³ ³ ³     ³ ³
  J8                   2o o o o o o o14
Option Block   ÍÍÍÍÍÍÍÍ1o o o o o o o ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍPWAÍÍÍÍÍÍÍÍÍÍ
                        ³   ³ ³ ³
                        ³   ³ ÀÄÁÄ Reserved
  (BOTTOM)              ÀÄÄÄÁÄÄÄÄÄ 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)

                Spare jumpers stored on pins 1-3 and 5-7, as shipped.


Note: If the Dual Drive Emulation jumper is used, then TWO CMOS drive
      types will be required, only ONE drive per cable is allowed,
      Cable Select is not supported and the drive responds as a single
      drive to power management commands.



                             ST-31270A
                           Medalist 1270

       FORMATTED CAPACITY (xx SECTORS) __________1282.8
       ACTUATOR TYPE ____________________________VOICE COIL
       CYLINDERS __PHYSICAL______________________3,876
       HEADS ______PHYSICAL______________________6
       DISCS (3.5 in) ___________________________3
       MEDIA TYPE _______________________________THIN FILM
       HEAD TYPE ________________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (1,7)
       INTERNAL TRANSFER RATE (Mbits/sec) _______29.6 to 57.2
       EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 16.6
       PIO MODE _________________________________4
       DMA SUPPORT ______________________________EISA Type B
       SPINDLE SPEED (RPM) ______________________4,500
       AVERAGE LATENCY (mSEC) ___________________6.67
       BUFFER ___________________________________256 Kbyte SeaCache
        Read/Write Multiple, Read Look-Ahead,
        Multi-Segmented
       INTERFACE ________________________________ATA
       SECTORS PER DRIVE (LBA mode) _____________2,505,528
       TPI (TRACKS PER INCH) ____________________4,250
       BPI (BITS PER INCH) ______________________73,530
       AVERAGE ACCESS (ms) ______________________12
       SINGLE TRACK SEEK (ms) ___________________3.5
       MAX FULL SEEK (ms) _______________________25
       MTBF (power-on hours) Office _____________300,000
       SHOCK (G's):
                operating (Read/Write) __________2
                abnormal ________________________10
                nonoperating ____________________75
       ACOUSTICS (dBa) (typ/max) ________________30/39
       POWER DISSIPATION (watts) ________________
       POWER REQUIREMENTS: +12V START-UP (amps) _1.9
       POWER MANAGEMENT (Watts):
                           ACTIVE _______________6.60
                           IDLE _________________2.75
                           STANDBY ______________1.0
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________AUTO
       IBM AT DRIVE TYPE ________________________*

       Physical:
                        Height (inches/mm):     1/25.4
                        Width  (inches/mm):  4.02/102.1
                        Depth  (inches/mm):  5.77/146.6
                        Weight    (lbs/kg):   1.5/0.68


 * 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:
       2485 cyl, 16 heads, 63 sectors = 1,282,498,560

                       DOS operating systems may require a system bios
                       that accepts larger values for the CMOS head
                       parameter which lowers cylinders below 1024:
        621 cyl, 64 heads, 63 sectors = 1,281,982,464

                       Other FULL-CAPACITY solutions for DOS operating
                       systems include third-party drive preparation
                       software, system BIOS which supports LBA mode
                       or bios driven host adapters. Otherwise,
                       capacity may be limited to:
       1024 cyl, 16 heads, 63 sectors = 528,482,304 (Master)
       1024 cyl, 16 heads, 63 sectors = 528,482,304 (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. (01/10/97)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/at/st31270a.txt.