SEAGATE TECHNOLOGY, INC. 1-800-SEAGATE http://www.seagate.com (C)opyright 1991 ST-157R ST412 RLL /ÄÄÄ¿ ³ O ³12 ³ O ³G ³ O ³G ³ O ³5 ÚData Cable ÚController Cable 1 \ÄÄÄÙ ÍÍÍÍÍÍÍÍÍ ÍÍ ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍÍ 1 o o o o o o o ÚÄÄÄÄÄÄÄÄÄÄÄÄ1 o o o o o o o o ÀÄÄÂÄÄÄÄÄÄÄÄÄÙ ³ ³ ³ ³ 4 3 2 1 À Resistor Termination Pack ³ ³ ³ ³ ÄÄÄÂÄÄÄ ³ ³ ³ ³ ³ ³ ³ ³ ³ ÀÄÄÄÄ Drive Selects ³ ³ ³ ÀÄÄÄÄÄÄÄÄÄ Factory Test ³ ³ ÀÄÄÄÄÄÄÄÄÄÄÄ Write Fault ³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÄ Not Used ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ Radial Note: Some configurations have the drive select jumper block oriented perpendicular to the back of the drive. In this configuration, pin-1 (radial select) is closest to the front faceplate of the drive. ST - 157R UNFORMATTED CAPACITY (MB) ________________57.7 FORMATTED CAPACITY (26 SECTORS) (MB) _____49.1 ACTUATOR TYPE ____________________________STEPPER TRACKS ___________________________________3,690 CYLINDERS ________________________________615 HEADS ____________________________________6 DISCS ____________________________________3 MEDIA TYPE _______________________________THIN FILM RECORDING METHOD _________________________RLL TRANSFER RATE (mbits/sec) ________________7.5 SPINDLE SPEED (RPM) ______________________3,600 INTERFACE ________________________________ST412 TPI (TRACKS PER INCH) ____________________824 BPI (BITS PER INCH) ______________________22,430 AVERAGE ACCESS (ms)*______________________40/28 SINGLE TRACK SEEK (ms) ___________________8 MTBF (power-on hours) ____________________150,000 POWER REQUIREMENTS: +12V START-UP (amps) _2.0 +12V TYPICAL (amps) __0.35 +5V TYPICAL (amps) ___0.8 TYPICAL (watts) ______8 MAXIMUM (watts) ______28 BUFFERED STEP PULSE RATE (micro sec) _____3-200 WRITE PRECOMP (cyl) ______________________N/A (616) REDUCED WRITE CURRENT (cyl) ______________N/A (616) LANDING ZONE (cyl)________________________AUTO PARK IBM AT DRIVE TYPE ________________________** *ST157R-0/ST157R-1 * MAY REQUIRE A CONTROLLER WITH BIOS SUPPORT, OR FORMATTING AND PARTITIONING SOFTWARE. ALSO, CHECK TO SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE AVAILABLE. Seagate reserves the right to change, without notice, product offerings or specifications. (6/26/90)