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The Model FDD100-5 Disk Drive is also equipped with an interface that allows upward expansion of
the units within the system and future system enhancements with the larger floppy disk drives. AC
power requirements have been eliminated through the use of a DC servo-controlled spindle-driven
motor.
1.2.4
HEAD CHARACTERISTICS
The read/write head is of the single-gap type with trailing tunnel-erase structure to ensure inter-
change capability by enhancing off-track reading capability. The written track is 0.013 inch
(0.03302 cm) wide, and the 40 tracks are centered at 1/48-inch (0.053-cm) intervals. The head
carriage is positioned by a precision four-start lead screw that is driven by a low-power, permanent-
magnet stepper motor.
1.3
FEATURES
The Model FDD100-5 Disk Drive includes the following features:
A.
Small Size - compactness and light weight.
B.
High Data Integrity - soft error rate not greater than one in 10 9 bits.
C.
Low Cost - competitive with cassette drives.
D.
Compatible Media - industry-standard media and format ensures
interchangeability.
E.
Gentle Media Handling - field proven patented positive operator
interlock extends media life, and does not allow clutch to engage
diskette unless package is correctly positioned in disk drive.
F.
Ceramic/Ferrite Heads - high reliability and long life.
G.
Daisy-Chain Capability - up to four disk drives may be interconnected
on a single bus.
H.
Simplified Power Requirements - uses only +5 and +12 volts DC power.
I.
Molded Construction - for rugged consistency and quality.
J.
Write Protection - optical write inhibit protects data file.
K.
High-Speed Head Positioner - provides track-to-track access time
of 25 milliseconds.
L.
Industry Standard Tracks - allows use of up to 40 tracks and matches
industry standards for the first 35 tracks.
M.
Double-Density Recording - disk drive electronics and head are designed
for use with MFM, M2FM or GCR double-density encoding techniques
which enable up to 250
K
bytes of unformatted data to be stored on each
side of a diskette.
1-3
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