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


ST-92255AG (Marathon 2250)

                            TOP       ÚÄ 44-pin I/O Connector (* see below)
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                                    ::::::::::::ù::::::::1  o o
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       pin-20 removed for keying ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ           ³ ³
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                                                            ³ ³
 Drive is Master, no Slave drive present ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ 0 0
 Drive is Master, Seagate Slave drive present ÄÄÄÄÄÄÄÄÄÄÄÄÄ 1 0
 Drive is Slave to another Seagate 2.5" Master ÄÄÄÄÄÄÄÄÄÄÄÄ 0 1
 Cable Select ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ 1 1

 * Drive uses +5vdc power supplied to the drive
   via the interface connector. The drive does
   NOT make use of a +12vdc power line.
   pin-41  +5vdc (Logic)
   pin-42  +5vdc (Motor)
   pin-43  Ground
   pin-44  Reserved


                             ST-92255AG
                           Marathon 2250

       FORMATTED CAPACITY _______________________2250.17
       ACTUATOR TYPE ____________________________VOICE COIL
       CYLINDERS __PHYSICAL______________________
       HEADS ______PHYSICAL______________________10
       DISCS (2.5 in) ___________________________5
       MEDIA TYPE _______________________________THIN FILM on GLASS
       HEAD TYPE ________________________________MR
       RECORDING METHOD _________________________ZBR PRML (8/9)
       INTERNAL TRANSFER RATE (Mbits/sec) _______up to 60.8
       EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 16.6
       PIO MODE _________________________________4
       DMA SUPPORT ______________________________EISA Type B
       SPINDLE SPEED (RPM) ______________________4,508
       AVERAGE LATENCY (mSEC) ___________________6.65
       BUFFER ___________________________________103 Kbyte
        Read/Write Multiple, Read Look-Ahead,
        Multi-Segmented
       INTERFACE ________________________________ATA
       SECTORS PER DRIVE (LBA mode) _____________4,394,940
       TPI (TRACKS PER INCH) ____________________5,555
       BPI (KBITS PER INCH) _____________________120
       AVERAGE ACCESS (ms read/write) ___________12/14
       SINGLE TRACK SEEK (ms read/write) ________4/5
       MAX FULL SEEK (ms read/write) ____________26/28
       MTBF (power-on hours) Office _____________300,000
       SHOCK (G's):
                operating (Read/Write) __________125
                abnormal ________________________
                nonoperating ____________________350
       ACOUSTICS (dBA) (typ/max) ________________24/30
       POWER DISSIPATION (watts) ________________
       POWER REQUIREMENTS: +5V START-UP (amps) __1.3
       POWER MANAGEMENT (Watts):
                           ACTIVE _______________2.5
                           IDLE _________________1.2
                           STANDBY ______________0.3
                           SLEEP ________________0.1
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________AUTO
       IBM AT DRIVE TYPE ________________________*

       Physical:
                        Height (inches/mm):         /17.20
                        Width  (inches/mm):     2.76/70.10
                        Depth  (inches/mm):         /100.45
                        Weight      (oz/g):         /204


 * 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:
       4360 cyl, 16 heads, 63 sectors = 2,250,178,560

                       DOS operating systems may require a translation
                       that uses larger values for the CMOS head
                       parameter which lowers cylinders below 1024:
       545 cyl, 128 heads, 63 sectors = 2,250,178,560

                       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 hang during boot, or 
it can truncate or wrap the cylinders when auto-detect options 
set in the CMOS.

DOS cannot access more than 2.147 Gbytes per partition.  Create
two partitions to access the drive's full capacity.

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)".

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. (04/22/97)