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ST-250R.TXT
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1989-03-09
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32 lines
ST - 250R
UNFORMATTED CAPACITY (MB) ________________50.0
FORMATTED CAPACITY (31 SECTORS) (MB) _____42.3
ACTUATOR TYPE ____________________________STEPPER
TRACKS ___________________________________2,668
CYLINDERS ________________________________667
HEADS ____________________________________4
DISCS ____________________________________2
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________RLL
TRANSFER RATE (mbits/sec) ________________7.5
INTERFACE ________________________________ST412
TPI (TRACKS PER INCH) ____________________588
BPI (BITS PER INCH) ______________________18,897
AVERAGE ACCESS (ms) ______________________70
SINGLE TRACK SEEK (ms) ___________________20
MTBF (power-on hours) ____________________50,000
POWER REQUIREMENTS: +12V START-UP (amps) _2.4
+12V TYPICAL (amps) __0.9
+5V TYPICAL (amps) ___1.1
TYPICAL (watts) ______16.3
MAXIMUM (watts) ______35
BUFFERED STEP PULSE RATE (micro sec) _____5-200
WRITE PRECOMP (cyl) ______________________N/A (668)
REDUCED WRITE CURRENT (cyl) ______________N/A (668)
LANDING ZONE (cyl)________________________670
IBM AT DRIVE TYPE ________________________N/A*
*MUST BE USED WITH THE ST11R CONTROLLER; MAY REQUIRE
PARTITIONING SOFTWARE