Alan Freedman -- The Computer Language Company - Computer Desktop Encyclopedia
Computer Desktop Encyclopedia
Longest-Running Tech Reference on the Planet

A CDE Definition

You'll love The Computer Desktop Encyclopedia (CDE) for Tech Term of the Day (TTOD)

LOOK UP ANOTHER TERM


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.






Personal Use Only

Before/After Your Search Term
BeforeAfter
accelerator boardaccess charge
accelerometeraccess code
Accelisaccess concentrator
ACCELL/SQLaccess control
accelleratoraccess control list
Accentureaccess control protocol
acceptable use policyaccess denied
acceptance angleaccess line
acceptance testaccess list
accessaccess method

Terms By Topic
Click any of the following categories for a list of fundamental terms.
Computer Words You Gotta KnowSystem design
Job categoriesUnix/Linux
Interesting stuffPersonal computers
InternetIndustrial Automation/Process Control
Communications & networkingAssociations/Standards organizations
HistoryDesktop publishing
Audio/VideoGraphics
MainframesSecurity
ProgrammingHealthcare IT
System design