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


ST-31275A, Cabo 1275 AT (Cabo CFS1275A)

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  º REAR VIEW º
  ÈÍÍÍÍÍÍÍÍÍÍͼ

 Optional Mini Power
 Power Connector      J2 40 pin I/O Cable Connection
    ÚÄÁÄ¿             ³
    G   5  ÕÍÍÍÍÍÍÍÍÍ  ÍÍÍÍÍÍÍÍ͸ /ÄÄÄÄÄÄÄÄÄ\    TOP (HDA)
  ͵0 0 0Æ͵::::::::::ú::::::::1Æͳ 0 0 0 0 ³ÍÍ
      12   ÔÍÍÍÍÍÍÍÍÍͳÍÍÍÍÍÍÍÍ; ÀÄ5ÄGÄGÄ12Ù    BOTTOM
                      ³
                      ÀÄÄÄ pin-20 removed


     ST-31275A
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  º  Front View  º              ÚÄÄÄÄ  Not Used
  ÈÍÍÍÍÍÍÍÍÍÍÍÍÍͼ              ³
                                ³ ÚÄÄ  Master ON, Slave OFF (C/D)
                                ³ ³
    (TOP)         o o o o o   o o o1
Option Block   ÍÍÍ  o o o o   o o o2ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ
   (BOTTOM)       ÀÄÄÄÂÄÄÄÙ   ³
                      ³       ³
          Reserved ÄÄÄÙ       ³
          Cable Select  ÄÄÄÄÄÄÙ


                             ST-31275A
                     Cabo 1275 AT (Cabo CFS1275A)

       FORMATTED CAPACITY _______________________1275
       ACTUATOR TYPE ____________________________VOICE COIL
       CYLINDERS __PHYSICAL______________________3640
       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) _______29.5 to 54.9
       EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 16.6
       PIO MODE _________________________________4
       DMA SUPPORT ______________________________EISA Type B
       SPINDLE SPEED (RPM) ______________________3600
       AVERAGE LATENCY (mSEC) ___________________8.33
       BUFFER ___________________________________64K
        Read/Write Multiple, Read Look-Ahead,
        Multi-Segmented
       INTERFACE ________________________________ATA
       SECTORS PER DRIVE (LBA mode) _____________
       TPI (TRACKS PER INCH) ____________________3849
       BPI (KBITS PER INCH) _____________________77K
       AVERAGE ACCESS (ms) ______________________14
       SINGLE TRACK SEEK (ms) ___________________3
       MAX FULL SEEK (ms) _______________________26
       MTBF (power-on hours) Office _____________300,000
       SHOCK (G's):
                operating (Read/Write) __________5
                abnormal ________________________
                nonoperating ____________________75
       ACOUSTICS (bels) (typ/max) _______________38/
       POWER DISSIPATION (watts) ________________
       POWER REQUIREMENTS: +12V START-UP (amps) _
       POWER MANAGEMENT (Watts):
                           ACTIVE _______________3.5
                           IDLE _________________3.5
                           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):  1.00/25.4
                        Width  (inches/mm):  4.00/101.6
                        Depth  (inches/mm):  5.75/146.1
                        Weight    (lbs/kg):   1.3/0.59


 * 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:
       2477 cyl, 16 heads, 63 sectors = 1,278,369,792

                       DOS operating systems may require a system bios
                       that accepts larger values for the CMOS head
                       parameter which lowers cylinders below 1024:
        619 cyl, 64 heads, 63 sectors = 1,277,853,696

                       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


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)".

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. (09/09/96)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/at/st31275a.txt.