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 ?
After technicians check out the crew access arm and complete the many other ground support equipment installations, the crawler-transporter will move the mobile launcher out to Launch Pad 39B for a fit-check and then inside the VAB for validation and verification tests.
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.
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.
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!