SEAGATE TECHNOLOGY, INC. 1-800-SEAGATE http://www.seagate.com (C)opyright 1991 ST-225 ST412 MFM /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 ÚÄÄÄÄÄÄÄÄÄÄÄÄ1 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 - 225 UNFORMATTED CAPACITY (MB) ________________25.6 FORMATTED CAPACITY (17 SECTORS) (MB) _____21.4 ACTUATOR TYPE ____________________________STEPPER TRACKS ___________________________________2,460 CYLINDERS ________________________________615 HEADS ____________________________________4 DISCS ____________________________________2 MEDIA TYPE _______________________________OXIDE RECORDING METHOD _________________________MFM TRANSFER RATE (mbits/sec) ________________5.0 SPINDLE SPEED (RPM) ______________________3,600 AVERAGE LATENCY (mSEC) ___________________8.3 INTERFACE ________________________________ST412 SECTORS PER DRIVE ________________________41,820 TPI (TRACKS PER INCH) ____________________588 BPI (BITS PER INCH) ______________________9,827 AVERAGE ACCESS (ms) ______________________65 SINGLE TRACK SEEK (ms) ___________________20 MAX FULL SEEK (ms) _______________________150 MTBF (power-on hours) ____________________100,000 POWER REQUIREMENTS: +12V START-UP (amps) _2.4 +12V TYPICAL (amps) __0.9 +5V TYPICAL (amps) ___0.8 TYPICAL (watts) ______14.8 MAXIMUM (watts) ______33 BUFFERED STEP PULSE RATE (micro sec) _____5-200 WRITE PRECOMP (cyl) ______________________300 REDUCED WRITE CURRENT (cyl) ______________N/A (616) LANDING ZONE (cyl)________________________670 IBM AT DRIVE TYPE ________________________2 Seagate reserves the right to change, without notice, product offerings or specifications. (6/26/90)