************************************************************ Miniscribe Disk Drive Specifications For Model: 3425 ************************************************************ FORM FACTOR 5.25 inch HH INTERFACE ST412/ST506 DATA ENCODING METHOD MFM DATA TRANSFER RATE (Mbit/Sec) 5.0 DISK DRIVE CHARACTERISTICS HEADS 4 CYLINDERS 615 SECTORS/TRACK (512 Byte Sectors) 17 WRITE PRECOMPENSATION CYLINDER 128 REDUCED WRITE CURRENT CYLINDER 615 MINIMUM STEP PULSE RATE (micro-Seconds) 2 UNFORMATTED BYTES/TRACK 10,416 RADIAL TRACK DENSITY (TPI) 588 ROTATIONAL SPEED (RPM) 3,600 UNFORMATTED CAPACITY (Millions of Bytes) 25.6 FORMATTED CAPACITY (Millions of Bytes) 21.4 FORMATTED CAP. (MB = 1,048,576 Bytes) 20.4 ACCESS TIMES (mSec)* SINGLE TRACK 15 ONE-THIRD STROKE** 85 MAXIMUM 190 *(BASED ON A 2 MICRO-SECOND STEP RATE) *(INCLUDES SETTLING) **(APPROXIMATION OF AVERAGE) POWER REQUIREMENTS DISSIPATION (Watts) TYPICAL 14.5 MAXIMUM 17.4 CURRENT (Amps) +5 V DC (+ or - 5%) 0.5 +12 V DC (+ or - 5%) 1.0 MAXIMUM STARTUP CURRENT 3.5 PHYSICAL DIMENSIONS HEIGHT (in) 1.625 WIDTH (in) 5.75 DEPTH (in) 8 WEIGHT (lbs) 2.2 OPERATIVE ENVIRONMENTAL LIMITS MINIMUM TEMPERATURE (Centigrade) 4 MAXIMUM TEMPERATURE (Centigrade) 50 THERMAL GRADIENT (Degrees C/Hour) 10 RELIABILITY MTBF (Hours) 20,000 MTTR (Minutes) 30 COMPONENT DESIGN LIFE (Years) 5