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                         SEAGATE TECHNOLOGY LLC
                              1-800-SEAGATE
                          http://www.seagate.com
                            (C)opyright 2002


ST-318452FC Fibre Channel FC-AL, Dual Port (Cheetah X15 36LP)

  ÉÍÍÍÍÍÍÍÍÍÍÍ»
  º REAR VIEW º  ST-318452FC
  ÈÍÍÍÍÍÍÍÍÍÍͼ
       40 pin I/O and DC Power Wall/bracket Connection
                     ³  Female
    J1          /ÄÄÄijÄÄÄÄÄÄÄÄÄ\      TOP (HDA)
     ÍÍÍÍÍÍÍÍÍÍ/ ×××××××××××××× \ÍÍÍÍÍÍÍÍÍÍ
              (\Ä1ÄÄÄÄÄÄÄÄÄÄÄÄ20/)    BOTTOM

     Notes on 40 pin I/O connector:
            +12v  =  pins  2, 3, 4, 21
            +5v   =  pins  19, 20, 40
            GND   =  pins  6, 22, 23, 26, 29, 32, 35

  Mating FC connector: AMP US p/n: 787317-1 straight-in, Male 40-pin


  ÉÍÍÍÍÍÍÍÍÍÍÍÍ»
  º FRONT VIEW º  (ST-318452FC)
  ÈÍÍÍÍÍÍÍÍÍÍÍͼ

Reserved. Shipped with cover installed.
Do not remove. Do not install jumpers
                                  ³     ÚÂÄÄÄÄ Reserved
                                  ³     ³³ÚÄÄÄ Fault LED
                                  ³     ³³³ÚÄÄ Port B Bypass LED
                                  ³     ³³³³ÚÄ Port A Bypass LED
                      TOP (HDA)  ÕØÍÍ͸ ³³³³1
     ÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͵::::³::::::ÆÍÍ
                 *    BOTTOM     ÔÍÍÍ;³³³ÀÅÙ
                 ³               J6    ³³³ ÀÄÄ Ground
            LED ÄÙ                     ³³ÀÄÄÄÄ Active LED
                                       ³ÀÄÄÄÄÄ Ground
                                       ÀÄÄÄÄÄÄ Remote LED (pin-11 +5v)

  ST318452FC drives have two independent FC-AL ports. These
  ports may be connected on independent loops or on the same
  loop.  Port A and Port B may be connected in any order or
  combination.



                            ST-318452FC



       UNFORMATTED CAPACITY (GB) ________________23.7
       FORMATTED CAPACITY (GB) __________________18.35
       AVERAGE SECTORS PER TRACK ________________484 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________73,988
       CYLINDERS ________________________________18,497 user
       HEADS ______PHYSICAL______________________4
       DISCS (3.0 in) ___________________________2
       MEDIA TYPE _______________________________THIN FILM/GMR
       RECORDING METHOD _________________________PRML 16/17 EPR4
       INTERNAL TRANSFER RATE (mbits/sec)________548 to 706
       INTERNAL FORMATTED TRANSFER RATE (MB/sec)_51.8 to 68.1
       EXTERNAL TRANSFER RATE (mbyte/sec/port)___106 Sync
       SPINDLE SPEED (RPM) ______________________15k
       AVERAGE LATENCY (mSEC) ___________________2.0
       BUFFER ___________________________________8MB
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________FC-AL 
         Fibre Channel - Arbitrated Loop, ASA II
       BYTES PER TRACK __________________________316,155
       SECTORS PER DRIVE ________________________35,843,670
       TPI (TRACKS PER INCH) ____________________38,000
       BPI (PEAK KBITS PER INCH) ________________482
       AVERAGE ACCESS (ms read/write)____________3.6/4.2
         Drive level without controller overhead
       SINGLE TRACK SEEK (ms read/write) ________0.4/0.8
       MAX FULL SEEK (ms read/write) ____________7.0/8.0
       MTBF (power-on hours) ____________________1,200,000
       SHOCK (G's, 11/2/.5 ms):
                operating (Read/Write) __________15
                abnormal ________________________40
                nonoperating ____________________75/250/100
       ACOUSTICS (Bels typical, sound power) ____3.7
       POWER DISSIPATION (watts/BTUs) Active ____/
                                      Idle ______10.3/35.18
       POWER REQUIREMENTS: +12V START-UP (amps) _1.44
                           +12V TYPICAL (amps) __0.51 idle
                           +5V START-UP (amps) __0.90
                           +5V TYPICAL (amps) ___0.83 idle
                           IDLE (watts) _________
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

       Physical:
                        Height (inches/mm):      1.0/25.4
                        Width  (inches/mm):     4.00/101.6
                        Depth  (inches/mm):     5.75/146
                        Weight    (lbs/kg):      1.5/0.68

Already low-level formatted at the factory with x spare sectors at
the end of each x cylinder region.  

ZBR = Zone Bit Recording = Variable sectors per track


Seagate reserves the right to change, without notice, product 
offerings or specifications. (10/09/2002)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/fibre_channel/ST318452.FC.