direct access

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direct access

a method of reading data from a computer file without reading through the file from the beginning as on a disk or drum

direct access

[də′rekt ′ak·ses]
(computer science)

direct access

(1) See Microsoft DirectAccess.

(2) The ability to read or write a specific storage location without having to go through any locations before or after it. Generally synonymous with "random access." Magnetic disks, SSDs, optical data discs and RAM are the primary direct access hardware in a computer.

Access Via Software First
Data are commonly accessed by first scanning an index or by a direct access computation that determines their storage addresses. See index, direct access method and random file.


Early Direct Access
Using a deck of 3x14" magnetic cards, NCR's CRAM was a direct access storage device in the 1960s. By the end of that decade, magnetic disks were becoming mainstream. See CRAM for more details. (Image courtesy of NCR Corporation.)
References in periodicals archive ?
Executives said the alliance with Applied Medical will give the firm immediate access to New England customers.
Camps should also recognize that there are some time-critical medications to which staff may need immediate access, and policies should be developed to arrange for appropriate storage and documentation of these medications if used.
This allows immediate access to cached data, so that critical files can be quickly processed for recovery and, as an added bonus, virtual tape intelligently stacks archive data on to real tape when dataset usage drops.
Noetix provides software that automatically generates metadata from enterprise applications, enabling immediate access to data.
After the month-end report, the sales information would still be important, but immediate access wouldn't be required.
Now providing greatly accelerated query-response time, StealthWatch allows immediate access to current and historical network flows.
The Cisco Express Leasing program gives Ingram Micro channel partners serving small to medium-sized businesses and mid-market businesses immediate access to Cisco Capital's available leasing offerings.
Provides immediate access to National Agencies & Associations, State Associations, Online Services, Libraries and Resource Centers, Research Centers, Support Groups and Hotlines, Camps, Books and Periodicals.
This portable electronic device provides immediate access to critical medical data and contact information that can be used in the event of an emergency.
These advantages allow Bakrie Telecom to pass along the savings to its customers and provide immediate access to quality voice and data services.
The university deployed Business Objects solutions on top of the data warehouse, which provided a gateway for less-technical users with immediate access to standard reports and easy-to-use, web-based analysis and query capabilities.
The service was created for Spanish speaking individuals and organizations that need immediate access to professional interpretation services, whether they are international travelers, small businesses needing to communicate with English speakers, or individuals in emergency situations.