Major Hda Components; Drive Mechanism; Rotary Actuator; Read/Write Electronics - Maxtor 87000D8 Installation And Use Manual

PRODUCT DESCRIPTION

Major HDA Components

Drive Mechanism

A brush-less DC direct drive motor rotates the spindle at 5,200 RPM (±0.1%). The dynamically balanced motor/spindle
assembly ensures minimal mechanical run-out to the disks. A dynamic brake provides a fast stop to the spindle motor upon
power removal. The speed tolerance includes motor performance and motor circuit tolerances.

Rotary Actuator

All DiamondMax™ 1750 drives employ a rotary voice coil actuator which consists of a moving coil, an actuator arm
assembly and stationary magnets. The actuator moves on a low-mass, low-friction center shaft. The low friction contributes
to fast access times and low power consumption.

Read/Write Electronics

An integrated circuit mounted within the sealed head disk assembly (near the read/write heads) provides up to eight head
selection (depending on the model), read pre-amplification and write drive circuitry.

Read/Write Heads and Media

Low mass, low force magneto-resistive read/write heads record data on 3.5-inch diameter disks. Maxtor uses a sputtered
thin film medium on all disks for DiamondMax 1750 drives.

Air Filtration System

All DiamondMax 1750 drives are assembled in a Class 100 controlled environment. Over the life of the drive, a 0.1
micron filter and breather filter located within the sealed head disk assembly (HDA) maintain a clean environment to the
heads and disks. DiamondMax 1750 drives are designed to operate in a typical office setting with minimum environmental
control.

Microprocessor

The microprocessor controls the following functions for the drive electronics:
Command execution
Cache management
Data correction and error recovery
Diagnostic execution
Data sequencing
Head positioning (including error recovery)
Host interface
Index detection
Spin speed control
Seeks
Servo
2 – 14