                         SEAGATE TECHNOLOGY, INC.
                            (C)opyright 1996


ST-34501N Ultra-SCSI (Cheetah 4LP)

  ͻ
   REAR VIEW   (ST-34501N)
  ͼ

         50 pin I/O Cable Connection
         
    J11 /\    TOP (HDA)
     ͵:::::::::::::::::::::::::ͳ 0 0 0 0 
      ; 5GG12    BOTTOM


  ͻ
   SIDE VIEW   (ST-34501N)
  ͼ


BACK   ͸       J2  12345678                    TOP (HDA)  FRONT
 OF    J1PWA OF
DRIVE  ;           ::::::::                    BOTTOM     DRIVE
                     
   Terminator Power ٳ Enable T-Res (N model only)
  ڴTerminator Power ٳ Start Delay (12 secs * ID)
           Reserved ٳ Motor Start
     Parity Disable  Write Protect
  
  
   Ŀ
  Ĵ Termination Power-source Table 
    Ŀ
    ........PWA edge          
                                                  
      1 2     1 2      1 2                        
     ķ       ķ           A Drive Supplies Bus 
                B Drive Supplies Own 
                C Bus Supplies Drive 
       A       B        C                         
    Default
    Note: ND drives do not have internal terminators or any other
          way of adding internal terminators to the drive; use
          external active termination if required.


  ͻ
   FRONT VIEW   (ST-34501N)
  ͼ
                                  ĴReserved. Shipped with cover installed.
                                    Do not remove. Do not install jumpers
                      TOP (HDA)  ͸     1
     PWA͵::::::::::
                 *    BOTTOM     ;123456
                                J6    
            LED                      
                            Remote LED ٳ ID 1
                           (pin-11 +5v)  ID 2
                              Reserved  ID 4


                            ST-34501N


       FORMATTED CAPACITY (GB) __________________4.55
       AVERAGE SECTORS PER TRACK ________________172 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________52,656
       CYLINDERS ________________________________6,582 user
       HEADS ______PHYSICAL______________________8
       DISCS (3.5 in) ___________________________4
       MEDIA TYPE _______________________________THIN FILM/MR
       RECORDING METHOD _________________________ZBR PRML (0,4,4)
       INTERNAL TRANSFER RATE (mbits/sec)________122 to 177
       INTERNAL FORMATTED TRANSFER RATE (MB/sec)_11.3 to 16.8
       EXTERNAL TRANSFER RATE (mbyte/sec) _______20 Sync
       SPINDLE SPEED (RPM) ______________________10,033
       AVERAGE LATENCY (mSEC) ___________________2.99
       BUFFER (/optional) _______________________512/2048 KByte
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________Ultra SCSI
                   ASA II, SCAM level 2
       BYTES PER TRACK __________________________ average
       SECTORS PER DRIVE ________________________8,890,080
       TPI (TRACKS PER INCH) ____________________
       BPI (PEAK KBITS PER INCH) ________________
       AVERAGE ACCESS (ms read/write)____________7.8/8.5
         Drive level with controller overhead
       SINGLE TRACK SEEK (ms read/write) ________0.78/1.04
       MAX FULL SEEK (ms) _______________________18
       MTBF (power-on hours) ____________________1,000,000
       SHOCK (G's):
                operating (Read/Write) __________
                abnormal ________________________
                nonoperating ____________________
       ACOUSTICS (Bels typical, sound power) ____
       POWER DISSIPATION (watts/BTUs) Active ____
                                      Idle ______
       POWER REQUIREMENTS: +12V START-UP (amps) _2.0
                           +12V TYPICAL (amps) __0.82 idle
                           +5V START-UP (amps) __
                           +5V TYPICAL (amps) ___0.74 idle
                           IDLE (watts) _________13.5
       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):     5.47/146
                        Weight    (lbs/kg):      1.5/0.68

Already low-level formatted at the factory with 80 spare sectors at
the end of each 8 cylinder region.  

ZBR = Zone Bit Recording = Variable sectors per track

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Seagate reserves the right to change, without notice, product
offerings or specifications. (12/11/96)

