The 400MB hard disk drive is intended for use in the Quadra 700 and 900
computers, as well as other Apple products. The drive possesses features
that benefit many different applications.
The hard disk assembly consists of as few mechanical components as
possible. It's designed for simplified assembly without requiring
sensitive adjustments or calibration during the manufacturing process.
Powerful data error correction techniques ensure data integrity. When
power is turned on, the drive releases the actuator arm assembly from the
locked position, only if the read/write heads have achieved a stable
flying condition. This feature ensures no direct physical contact between
the heads and the data area on the disk surfaces. If power shuts off
suddenly, the actuator arm automatically retracts to the landing zone
before the heads make contact with the disk surfaces.