access arm


Also found in: Dictionary, Thesaurus, Medical, Legal, Financial.

access arm

[′ak‚ses ‚ärm]
(computer science)
The mechanical device which positions the read/write head on a magnetic storage unit.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
Be sure to wash your access arm with antibacterial soap at the patient's sink immediately before your treatment and before going to your dialysis chair.
There is a paucity of detailed information regarding appropriate or optimal positioning of the access arm.
Also, do not check blood pressures in the access arm. Thank you for helping our patients to preserve their veins and their life-saving dialysis accesses!