SEAGATE TECHNOLOGY, INC.
Technical Support Bulletin Board
408/438-8771  [300-9600 HST, MNP 3/5, N-8-1]
(C)opyright  1990                           

ST-252 (same as ST-251 with Terminator that cannot be removed, therfore
drive must be installed at the end of the daisychain cable.)

                                                          /Д4Д3Д2Д1Д\
                                                          і O O O O і Power
              o o o o o o o o                             АДДДДДДДДДЩ
  ЪData Cable o o o o o o o o  ЪController Cable    1       5 G G 12
 ННННННННН НН і і і і і і і і НННННННННННННННННННН ННН   НННННННННННН
              і і і і і і і і ЪДДДДДДДДДДДД1
              і і і і і і і і АДTerminatorДЩ- cannot be removed
              і і і і і і і і
Drive Select->1 2 3 4 і і і А Radial
                і і і і і АДД Reserved
                і АВЩ і АДДДД Write Fault
                і  і  АДДДДДД Factory Test
                і  АДДДДДДДДД Never Used (Drive Select 3 and 4)
                А If twisted cable, use Drive Select 2

                          ST - 252

       UNFORMATTED CAPACITY (MB) ________________51.2
       FORMATTED CAPACITY (17 SECTORS) (MB) _____42.8
       ACTUATOR TYPE ____________________________STEPPER
       TRACKS ___________________________________4,920
       CYLINDERS ________________________________820
       HEADS ____________________________________6
       DISCS ____________________________________3
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________MFM
       TRANSFER RATE (mbits/sec) ________________5.0
       INTERFACE ________________________________ST506
       TPI (TRACKS PER INCH) ____________________777
       BPI (BITS PER INCH) ______________________9,935
       AVERAGE ACCESS (ms) ______________________40/28*
       SINGLE TRACK SEEK (ms) ___________________8
       MTBF (power-on hours) ____________________100,000
       POWER REQUIREMENTS: +12V START-UP (amps) _2.0/2.5*
                           +12V TYPICAL (amps) __0.5
                           +5V TYPICAL (amps) ___1.0/1.2*
                           TYPICAL (watts) ______11/12*
                           MAXIMUM (watts) ______29/36*
       BUFFERED STEP PULSE RATE (micro sec) _____3-200
       WRITE PRECOMP (cyl) ______________________N/A (821)
       REDUCED WRITE CURRENT (cyl) ______________N/A (821)
       LANDING ZONE (cyl)________________________AUTO PARK
       IBM AT DRIVE TYPE ________________________44, 40, or 3**

       *ST251-0/ST251-1
       **MAY REQUIRE PARTITIONING SOFTWARE

Seagate reserves the right to change, without notice, product
offerings or specifications. (6/26/90)
