access arm


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access arm

[′ak‚ses ‚ärm]
(computer science)
The mechanical device which positions the read/write head on a magnetic storage unit.

access arm

The mechanical arm that moves the read/write head across the surface of a hard disk similar to the tone arm on a phono turntable. The access arm is directed by instructions in the operating system to move the head to a specific track, and the rotation of the platter positions it over the required sector. Also called an "actuator arm" because the actuator is the motor and mechanism that moves the arm. See read/write head and track.


Access Arms and Platters
The disk's access arm is a marvel of mechanical operation as it moves at blazing speed back and forth across the surface of the platters. The large multi-platter drive is early 1990s vintage, while the tiny single-platter Microdrive is from the mid-2000s. See Microdrive.


Access Arms and Platters
The disk's access arm is a marvel of mechanical operation as it moves at blazing speed back and forth across the surface of the platters. The large multi-platter drive is early 1990s vintage, while the tiny single-platter Microdrive is from the mid-2000s. See Microdrive.
References in periodicals archive ?
Although there will be no crew on the first flight, the crew access arm provides a bridge to Orion for personnel and equipment entering the spacecraft and allows the ground crew access for processing and prelaunch integrated testing while in the Vehicle Assembly Building (VAB) and at Launch Pad 39B.
Upon arrival to the clinic's waiting room, the patient will apply a warm, moist towel to the access arm to moisten scabs for easier removal.
Its going to be so cool when our astronauts are walking out across this access arm to get on the spacecraft and go to the space station.
The patient extends the access arm to the side horizontally, at or just below shoulder level, and rests it on the cushion.
Also, do not check blood pressures in the access arm.