ST-225 ST412 MFM

                                                          /-4-3-2-1-\
                                                          | O O O O | Power
              o o o o o o o o                             +---------+
  +Data Cable o o o o o o o o  +Controller Cable    1       5 G G 12
 --------- -- | | | | | | | | -------------------- ---   ------------
              | | | | | | | | +------------1
              | | | | | | | | +-Terminator-+
              | | | | | | | |
Drive Select->1 2 3 4 | | | + Radial
                | | | | | +-- Reserved
                | +++ | +---- Write Fault
                |  |  +------ Factory Test
                |  +--------- Never Used (Drive Select 3 and 4)
                + If twisted cable, use Drive Select 2

                              ST - 225

       UNFORMATTED CAPACITY (MB) ________________25.6
       FORMATTED CAPACITY (17 SECTORS) (MB) _____21.4
       ACTUATOR TYPE ____________________________STEPPER
       TRACKS ___________________________________2,460
       CYLINDERS ________________________________615
       HEADS ____________________________________4
       DISCS ____________________________________2
       MEDIA TYPE _______________________________OXIDE
       RECORDING METHOD _________________________MFM
       TRANSFER RATE (mbits/sec) ________________5.0
       SPINDLE SPEED (RPM) ______________________3,600
       AVERAGE LATENCY (mSEC) ___________________8.3
       INTERFACE ________________________________ST412
       SECTORS PER DRIVE ________________________41,820
       TPI (TRACKS PER INCH) ____________________588
       BPI (BITS PER INCH) ______________________9,827
       AVERAGE ACCESS (ms) ______________________65

       SINGLE TRACK SEEK (ms) ___________________20
       MAX FULL SEEK (ms) _______________________150
       MTBF (power-on hours) ____________________100,000
       POWER REQUIREMENTS: +12V START-UP (amps) _2.4
                           +12V TYPICAL (amps) __0.9
                           +5V TYPICAL (amps) ___0.8
                           TYPICAL (watts) ______14.8
                           MAXIMUM (watts) ______33
       BUFFERED STEP PULSE RATE (micro sec) _____5-200
       WRITE PRECOMP (cyl) ______________________300
       REDUCED WRITE CURRENT (cyl) ______________N/A (616)
       LANDING ZONE (cyl)________________________670
       IBM AT DRIVE TYPE ________________________2

Seagate reserves the right to change, without notice, product
offerings or specifications. (6/26/90)


Copyright © 1985 to 2022 Beta Systems                            Last modified: Wednesday, January 05, 2022 .