SEAGATE TECHNOLOGY, INC. 1-800-SEAGATE http://www.seagate.com (C)opyright 1991 ST-277R ST412 RLL /Ä4Ä3Ä2Ä1Ä\ ³ O O O O ³ Power o o o o o o o o ÀÄÄÄÄÄÄÄÄÄÙ ÚData Cable o o o o o o o o ÚController Cable 1 5 G G 12 ÍÍÍÍÍÍÍÍÍ ÍÍ ³ ³ ³ ³ ³ ³ ³ ³ ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍÍ ³ ³ ³ ³ ³ ³ ³ ³ 1ÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ ³ ³ ³ ³ ³ ³ ³ ÀÄTerminatorÄÙ ³ ³ ³ ³ ³ ³ ³ ³ Drive Select->1 2 3 4 ³ ³ ³ À Radial ³ ³ ³ ³ ³ ÀÄÄ Reserved ³ ÀÂÙ ³ ÀÄÄÄÄ Write Fault ³ ³ ÀÄÄÄÄÄÄ Factory Test ³ ÀÄÄÄÄÄÄÄÄÄ Never Used (Drive Select 3 and 4) À If twisted cable, use Drive Select 2 ST - 277R UNFORMATTED CAPACITY (MB) ________________76.9 FORMATTED CAPACITY (26 SECTORS) (MB) _____65.5 ACTUATOR TYPE ____________________________STEPPER TRACKS ___________________________________4,920 CYLINDERS ________________________________820 HEADS ____________________________________6 DISCS ____________________________________3 MEDIA TYPE _______________________________THIN FILM RECORDING METHOD _________________________RLL (2,7) TRANSFER RATE (mbits/sec) ________________7.5 SPINDLE SPEED (RPM) ______________________3,600 AVERAGE LATENCY (mSEC) ___________________8.3 INTERFACE ________________________________ST412 SECTORS PER DRIVE ________________________127,920 TPI (TRACKS PER INCH) ____________________777 BPI (BITS PER INCH) ______________________14,902 AVERAGE ACCESS (ms)*______________________40/28 SINGLE TRACK SEEK (ms) ___________________8 MAX FULL SEEK (ms) _______________________ /70 MTBF (power-on hours) ____________________70,000 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 _______________________** *ST277R-0/ST277R-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)