SEAGATE TECHNOLOGY, INC. Technical Support Bulletin Board 408/438-8771 [up to 9600, N-8-1] (C)opyright 1990 ST - 251 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)