SEAGATE TECHNOLOGY, INC. Customer Technical Support FAX Network +1 408 438-8137 Customer Technical Support Bulletin Boards (300-9600, 8-N-1) /----------------------------------+---------------------------------\ | United States +1 408 438-8771 | United Kingdom +44 628 478011 | +----------------------------------+---------------------------------| | Germany +49 89 140-9331 | Singapore +65 227-2217 | \----------------------------------+---------------------------------/ (C)opyright 1991 ST-138R ST412 RLL /---\ | O |12 | O |G | O |G | O |5 /Data Cable /Controller Cable 1 \---/ ========= == ==================== === ============ 1 o o o o o o o /------------1 o o o o o o o o \--+---------/ | | | | 4 3 2 1 \ Resistor Termination Pack | | | | ---+--- | | | | | | | | | \---- Drive Selects | | | \--------- Factory Test | | \----------- Write Fault | \------------- Not Used \--------------- 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 - 138R UNFORMATTED CAPACITY (MB) ________________38.4 FORMATTED CAPACITY (26 SECTORS) (MB) _____32.7 ACTUATOR TYPE ____________________________STEPPER TRACKS ___________________________________2,460 CYLINDERS ________________________________615 HEADS ____________________________________4 DISCS ____________________________________2 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 ________________________63,960 TPI (TRACKS PER INCH) ____________________824 BPI (BITS PER INCH) ______________________22,430 AVERAGE ACCESS (ms)*______________________40/28 SINGLE TRACK SEEK (ms) ___________________8 MAX FULL SEEK (ms) _______________________ /70 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 ________________________** *ST138R-0/ST138R-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)