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-157N SCSI /---\ | O |12 | O |G | O |G | O |5 SCSI Connector \---/ =====P=W=A====================================== o o o o o |::::::::::::::::::::::::1| o o o o o \=========================/ 4 2 1 | P /------1/------1/------1 --+-- | | \------/\------/\------/ | | | \ Resistor Termination Packs | | | | | \- Parity Check enable | \--- Not Used \------- Drive ID's, ID 0 (none) for single drive system ST - 157N UNFORMATTED CAPACITY (MB) ________________57 FORMATTED CAPACITY (26 SECTORS) (MB) _____48.6 ACTUATOR TYPE ____________________________STEPPER TRACKS ___________________________________3,678 CYLINDERS ________________________________615 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 BUFFER ___________________________________2 Kbyte INTERFACE ________________________________SCSI SECTORS PER DRIVE ________________________94,860 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) ___0.9 TYPICAL (watts) ______9 MAXIMUM (watts) ______29 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 ________________________0 or NONE *ST157N-0/ST157N-1 Seagate reserves the right to change, without notice, product offerings or specifications. (6/26/90)