                         SEAGATE TECHNOLOGY, INC.
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                            (C)opyright 1991



ST-42000N  Elite 2 Fast SCSI-2

                              This T-RES only on Differential model
                                (see below for T-RES descriptions)
     Spindle Sync                   Terminator Power Source (see below)Ŀ
                41Ŀ  *1 4oo3 1                            
               po oo  A  ĳ 2o o1 ĳ                            
     o o o o o no oo  B    Terminator DIPS           Power    o o o o     
     o o o o o  ͸  12GG5Ŀ o o o o     
    PWA͵::::::::::::::::::::::::1͵ 0 0 0 0    
     4 2 1            ;  \/         
                    SCSI Cable Connector                          
                                                                      
            Master off/Slave on - Spindle Sync                      
           Write Protect option enable                             
        SCSI ID                                                 
                                    Spinup Delay (10 secs * ID)         
                                      Motor Start option enable        
                                           Parity check DISable       
                                             Sweep Cycle enable      
                                                                             
 ͸                                        
   Terminator Power Source Options 
 Ŀ
   2 & 4  Initiator supplies power over the SCSI Bus for terminators. 
             Drive supplies no terminator power.                       
   1 & 2  Drive supplies power for its own terminator resistor-paks   
             but not to SCSI Bus.  This is the factory setting.        
   1 & 3                                                               
    AND   Drive supplies power fpr external terminator at end of the  
   2 & 4     daisy chain. Terminator resistor-paks must be removed.    
             This option is recommended only for last drive on daisy   
             chain.                                                    
 
    T-RES descriptions: ST42000N   2 SIPs
                        ST42000ND  2 DIPs


                             ST-42000N
                              Elite 2

       UNFORMATTED CAPACITY _____________________2,106,263,040
       FORMATTED CAPACITY (512 byte blk) ________1,792,111,616
       AVERAGE SECTORS PER TRACK ________________83
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________41,984
       CYLINDERS ________________________________2,627/2,624 (user)
       HEADS ____________________________________16
       DISCS (5.25 in) __________________________9
       MEDIA TYPE _______________________________THIN FILM
       HEAD TYPE ________________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (2,7)
       INTERNAL TRANSFER RATE (mbits/sec) _______30-40
       EXTERNAL TRANSFER RATE (mbyte/sec) _______10 (burst)
       SPINDLE SPEED (RPM) ______________________5,400
       AVERAGE LATENCY (mSEC) ___________________5.55
       COMMAND OVERHEAD (mSEC) __________________<0.5
       BUFFER ___________________________________256 Kbyte
         Read Look-Ahead, Adaptive, Multi-Segmented
         Cache
       INTERFACE ________________________________SCSI-2 FAST
       BYTES PER TRACK __________________________42,000-55,440
       SECTORS PER DRIVE ________________________3,500,218
       BYTES PER CYLINDER _______________________672,000-887,040
       TPI (TRACKS PER INCH) ____________________2,250
       BPI (BITS PER INCH) ______________________41,713
       AVERAGE ACCESS (ms) ______________________11
       SINGLE TRACK SEEK (ms) ___________________1.7
       MAX FULL SEEK (ms) _______________________22.5
       MTBF (power-on hours) Class A Room _______250,000
       MTBF (power-on hours) Office _____________150,000
       POWER REQUIREMENTS: Single ended/Differential
                           +12V START-UP (amps) _4.6/4.6
                           +12V TYPICAL (amps) __2.0/2.0
                           +5V START-UP (amps) __2.3/2.6
                           +5V TYPICAL (amps) ___2.3/2.6
                           TYPICAL (watts) ______29.9/31.8
                           MAXIMUM (watts) ______33.7/36.6
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________Auto
       USER MANUAL PART NUMBER __________________
       OTHER ____________________________________
        Synchronized Spindles, Sweep Cycle Capability

ZBR = Zone Bit Recording = Variable sectors per track

** Already low-level formatted at the factory with six spare sectors
per cylinder, one spare cylinders/unit, one system cylinder/unit, and
one diagnostic cylinder/unit.

       Physical:
                        Height (inches/mm):     3.25/82.6
                        Width  (inches/mm):     5.75/146.1
                        Depth  (inches/mm):     8.0/203
                        Weight    (lbs/kg):     7.8/3.6


Seagate reserves the right to change, without notice, product
offerings or specifications. (12/14/92)

