Air Filtration System; Positioning Mechanism; Read/Write Heads And Discs - Seagate ST506 Product Manual

2.4 Air Filtration System (Figures 1.0 & 2.0)
The discs and read/write heads are fully enclosed in a chamber using
an integral air recirculation system and a 0.3 micron filter to maintain
a clean environment. The filter also contains a port which permits am-
bient pressure equalization without contaminate entry.
2.5 Positioning Mechanism (Figure 3.0)
The read/write heads are mounted on a ball bearing supported car-
riage which is positioned by a band actuator connected to the step-
per motor shaft. The stepper motor is thermally isolated from the
HDA to minimize temperature rise within the sealed chamber.
2.6 Read/Write Heads and Discs
The recording media consists of a lubricated thin magnetic oxide
coating on a 130mm diameter aluminum substrate. This coating form-
ulation, integrated with the low load force/loW mass flying heads, per-
mits reliable contact start/stop operation.
Data on each of the disc surfaces is read by one read/write head, each
of which accesses 153 tracks.
FIGURE 1.0
AIR FILTRATION SYSTEM
- SCRUBBING
FILTER
-5-
CASTING
DISC