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Helical-Scan Recording
To increase the amount of data that can be recorded on the tape, the
tape drive implements advanced helical-scan recording technology.
Helical-scan recorders write very narrow tracks at an acute angle to
the edge of the tape, as shown in Figure 2-1. This recording method
createsatracklengththatisseveraltimeslongerthanthewidthofthe
tape. Tracks can be accurately positioned by the geometry of the tape
path to precise minimal tolerances, resulting in a very high number of
tracks per inch.
The combination of the helical wrap of the tape around the drum, the
rotation of the head/drum assembly, and the linear motion of the
tape causes the heads to trace a track across the tape that is 2.47 inches
(62.7 millimeters) long, at an acute angle of approximately 5 degrees
to the bottom edge of the tape.
Figure 2-1 Helical-scan recording
2-2 EXB-8205 and EXB-8505 510504
(Standard and XL)
2 Recording Format