Fujitsu MPF3XXXAH manual

(1)Disk

The outer diameter of the disk is 95 mm. The inner diameter is 25 mm. The number of disks used varies with the model, as described below. The disks are rated at over 40,000 start/stop operations.

MPF3102AH: 1 disks

MPF3153AH: 2 disks

MPF3204AH: 2 disks

(2)Head

The heads are of the contact start/stop (CSS) type. The head touches the disk surface while the disk is not rotating and automatically lifts when the disk starts.

(3)Spindle motor

The disks are rotated by a direct drive Hall-less DC motor.

(4)Actuator

The actuator uses a revolving voice coil motor (VCM) structure which consumes low power and generates very little heat. The head assembly at the tip of the actuator arm is controlled and positioned by feedback of the servo information read by the read/write head. If the power is not on or if the spindle motor is stopped, the head assembly stays in the specific CSS zone on the disk and is fixed by a mechanical lock.

(5)Air circulation system

The disk enclosure (DE) is sealed to prevent dust and dirt from entering. The disk enclosure features a closed loop air circulation system that relies on the blower effect of the rotating disk. This system continuously circulates the air through the recirculation filter to maintain the cleanliness of the air in the disk enclosure.

(6)Read/write circuit

The read/write circuit uses a LSI chip for the read/write preamplifier. It improves data reliability by preventing errors caused by external noise.

(7)Controller circuit

The controller circuit consists of an LSI chip to improve reliability. The high-speed microprocessor unit (MPU) achieves a high-performance AT controller.

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