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


ST-52520A (Medalist Pro 2520 AT)

  ÉÍÍÍÍÍÍÍÍÍÍÍ»
  º REAR VIEW º
  ÈÍÍÍÍÍÍÍÍÍÍͼ

                 J2  40 pin   I/O Cable Connection
                 ³
      ÕÍÍÍÍÍÍÍÍÍ  ÍÍÍÍÍÍÍÍÍÑÍÍÍÍÍÍÍ1Í/ÄÄÄÄÄÄÄÄÄ\    TOP (HDA)
     ͵::::::::::ú::::::::1³ : : : : ³ 0 0 0 0 ³ÍÍ
      ÔÍÍÍÍÍÍÍÍÍͳÍÍÍÍÍÍÍÍÍÏ8³Í³Í³Í³ÍÀÄ5ÄGÄGÄ12Ù    BOTTOM
                 ³           ³ ³ ³ ³
 pin-20 removed ÄÙ           ³ ³ ³ ÀÄÄ Remote LED (1-, 2+)
                             ³ ³ ÀÄÄÄÄ Alternate Capacity (see below)
                             ³ ÃÄÄÄÄÄÄ Slave Present (used on Master)
                             ³ ÀÄÄÄÄÄÄ Cable Select (when Slave ON)
                             ÀÄÄÄÄÄÄÄÄ Master OFF, Slave ON
                                        (spare jumper stored on
                                         pins 6-8)

   Alternate Capacity jumper sets the default cylinder translation
to 4092 to solve issues with certain BIOS that only auto-detect.  
Total available sectors are still at full capacity as reported via 
Identify Drive data words 52 - 61.  Third party partitioning software
may be needed to achieve full capacity if this option jumper is used.


                             ST-52520A
                        Medalist Pro 2520

       FORMATTED CAPACITY (MB) __________________2564
       ACTUATOR TYPE ____________________________VOICE COIL
       CYLINDERS __PHYSICAL______________________6536
       HEADS ______PHYSICAL______________________4
       DISCS (3.5 in) ___________________________2
       MEDIA TYPE _______________________________THIN FILM
       HEAD TYPE ________________________________MR
       RECORDING METHOD _________________________ZBR PRML (0,4,4)
       INTERNAL TRANSFER RATE (Mbits/sec) _______63 to 116
       EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 16.6
       PIO MODE _________________________________4
       DMA SUPPORT ______________________________EISA Type B
       SPINDLE SPEED (RPM) ______________________5,397
       AVERAGE LATENCY (mSEC) ___________________5.58
       BUFFER ___________________________________128 Kbyte SeaCache
        Read/Write Multiple, Read Look-Ahead,
        Multi-Segmented
       INTERFACE ________________________________ATA
       SECTORS PER DRIVE (LBA mode) _____________5,009,760
       TPI (TRACKS PER INCH) ____________________6,730
       BPI (KBITS PER INCH) _____________________138.0
       AVERAGE ACCESS (ms read/write) ___________12/13
       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
                abnormal ________________________10
                nonoperating ____________________75
       ACOUSTICS (dBA) (typ/max) ________________27/33
       POWER DISSIPATION (watts) ________________
       POWER REQUIREMENTS: +12V START-UP (amps) _1.9
       POWER MANAGEMENT (Watts):
                           ACTIVE _______________7.9
                           IDLE _________________7.5
                           STANDBY ______________4.3
       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):   4.00/102.1
                        Depth  (inches/mm):   5.38/127.5
                        Weight    (lbs/kg):   1.0/0.45


 * MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE.  ALSO, CHECK TO
SEE IF YOUR CMOS SETUP HAS AN "AUTO", "CUSTOM" OR "USER DEFINABLE" DRIVE 
TYPE AVAILABLE. (see below)

Possible translations:
                       This translation is generally acceptable, as
                       is, for non-DOS operating systems:
       4970 cyl, 16 heads, 63 sectors = 2,564,997,120 

                       DOS operating systems may require a translation
                       that uses larger values for the CMOS head
                       parameter which lowers cylinders below 1024:
       621 cyl, 128 heads, 63 sectors = 2,563,964,928

                       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

Some systems BIOS have capacity limitations. 
Types that have been identified are:
a 2.113GB or 4095 cylinder limitation 
and, if exceeded, may cause the system to fail or lock up during POST
with auto-detect options set in the CMOS.


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. (02/11/98)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/at/st52520a.txt.