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


ST-5540A (Medalist 540sl AT, formerly Decathlon 540 AT)

  ÉÍÍÍÍÍÍÍÍÍÍÍ»
  º REAR VIEW º
  ÈÍÍÍÍÍÍÍÍÍÍͼ

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

    ST-5540A
 ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
 º  Front View  º
 ÈÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
                 ÚÄÄÄÄÄÄ Master OFF, Slave ON
                 ³Ú Ä Ä Ä (spare jumper stored on pins 2-4 default)
                 ³ ÚÄÄÄÄ Slave Present (used on Master)
                 ³³³ ÚÄÄ Master/Slave timing protocol causes Master
  (TOP)          ³ ³ ³    drive to wait up to 31 seconds for slave
                 ³³³ ³    to respond. (default ON, OFF=5 secs.)
                 ³ ³ ³
  J2             oÁo o o o o12
Option Block   Í1o o o o o o ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍPWAÍÍÍÍÍÍÍÍÍÍ
                       ³ ³ ³
  (BOTTOM)             ³ ³ ÀÄ Remote LED (11-, 12+)
                       ³ ÀÄÄÄ Cable Select
                       ÀÄÄÄÄÄ Reserved



                             ST-5540A
                             Medalist 540sl

       FORMATTED CAPACITY (xx SECTORS) __________541.9
       ACTUATOR TYPE ____________________________VOICE COIL
       CYLINDERS __PHYSICAL______________________4,834
       HEADS ______PHYSICAL______________________2
       DISCS (3.5 in) ___________________________1
       MEDIA TYPE _______________________________THIN FILM
       HEAD TYPE ________________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (1,7)
       INTERNAL TRANSFER RATE (Mbits/sec) _______34.5 to 67.7
       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 ___________________________________128 or 256 Kbyte
        Read/Write Multiple, Read Look-Ahead,
        Multi-Segmented
       INTERFACE ________________________________ATA
       SECTORS PER DRIVE (LBA mode) _____________1,058,400
       TPI (TRACKS PER INCH) ____________________4,800
       BPI (BITS PER INCH) ______________________76,200
       AVERAGE ACCESS (ms) ______________________10.5
       SINGLE TRACK SEEK (ms) ___________________2.0
       MAX FULL SEEK (ms) _______________________20
       MTBF (power-on hours) Office _____________300,000
       SHOCK (G's):
                operating (Read/Write) __________2
                abnormal ________________________10
                nonoperating ____________________75
       ACOUSTICS (dBa) (typ/max) ________________30/38
       POWER DISSIPATION (watts) ________________
       POWER REQUIREMENTS: +12V START-UP (amps) _1.10
                           +12V TYPICAL (amps) __0.220 idle
                           +5V START-UP (amps) __0.266
                           +5V TYPICAL (amps) ___0.143 idle
       POWER MANAGEMENT (Watts):
                           SPINUP _______________8.95
                           ACTIVE _______________6.52
                           IDLE _________________3.36
                           STANDBY ______________0.71
       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):     .75/0.34


 * 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:
       1050 cyl, 16 heads, 63 sectors = 541,900,800

                       DOS operating systems may require a system bios
                       that accepts larger values for the CMOS head
                       parameter which lowers cylinders below 1024:
        525 cyl, 32 heads, 63 sectors = 541,900,800

                       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:
       1024 cyl, 16 heads, 63 sectors = 528,482,304

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. (01/11/98)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/at/st5540a.txt.