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2.1.4 Disk Enclosure
The disk enclosure (DE) is the unit that houses
the disk, spindle, and actuator. These components
are visible through the clear plastic cover, but are
not accessible by the customer or the CEo
Note:
The DE is sealed at the factory and is not
opened in the field.
The disk enclosure has a closed-loop air circula-
tion system that uses blades on the spindle hub
to continuously circulate air through the air filter.
A breather filter equalizes the air pressure during
startup and surrounding temperature changes.
2.1.5 Disk Spindle
The disk spindle assembly is mounted in a housing
in the back of the disk enclosure. The housing is
sealed to prevent contaminants from being drawn
into the disk enclosure through the bearings.
The disk is clamped to a mounting hub on the
disk spindle. A pulley is mounted on the other
end of the spindle, and is driven by a motor
mounted on the subframe.
2.1.6 Transducer
An electromagnetic transducer mounted on the
disk enclosure senses a slot in the spindle pulley
to indicate disk speed.
Back View
Breather
Filter
Disk Enclosure
Front View
Cross-Section of Disk Enclosure (DE)
Disk
Spindle
Bottom View
Disk
DE Cards
and Cables
DE Cards
Air Filter
2-2
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