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-251N SCSI 5 G G 12 /SCSI Cable /-4-3-2-1-\ o o o o /...|.....................\ | O O O O | Power o o o o ........................1 \---------/ ======================================================== 1 2 4 P 1----/ 1----/ 1----/ Terminating Resistors --+-- \- Parity Check enable \----- ID Selects, ID 0 (none) for single drive system ST - 251N UNFORMATTED CAPACITY (MB) ________________51 FORMATTED CAPACITY (26/34* SECTORS) (MB) _43.1/43.2* ACTUATOR TYPE ____________________________STEPPER TRACKS ___________________________________3,280/2,520* CYLINDERS ________________________________820/630* HEADS ____________________________________4 DISCS ____________________________________2 MEDIA TYPE _______________________________THIN FILM RECORDING METHOD _________________________RLL TRANSFER RATE (mbits/sec) ________________7.5/10* SPINDLE SPEED (RPM) ______________________3,600 INTERFACE ________________________________SCSI TPI (TRACKS PER INCH) ____________________777 BPI (BITS PER INCH) ______________________14,902/19,869* AVERAGE ACCESS (ms) ______________________40/28* SINGLE TRACK SEEK (ms) ___________________8 MTBF (power-on hours) ____________________70,000 POWER REQUIREMENTS: +12V START-UP (amps) _2.0/2.5* +12V TYPICAL (amps) __0.5 +5V TYPICAL (amps) ___1.2/1.4* TYPICAL (watts) ______12/13* MAXIMUM (watts) ______30/37* BUFFERED STEP PULSE RATE (micro sec) _____3-200 WRITE PRECOMP (cyl) ______________________N/A (821/631*) REDUCED WRITE CURRENT (cyl) ______________N/A (821/631*) LANDING ZONE (cyl)________________________AUTO PARK IBM AT DRIVE TYPE ________________________0 or NONE *ST251N-0/ST251N-1 Seagate reserves the right to change, without notice, product offerings or specifications. (6/26/90)