direct-access storage device: meaning, definition, pronunciation and examples
C1/C2Technical
Quick answer
What does “direct-access storage device” mean?
A computer storage device (like a hard disk drive or SSD) where data can be retrieved directly from any location without reading through preceding data sequentially.
Audio
Pronunciation
Definition
Meaning and Definition
A computer storage device (like a hard disk drive or SSD) where data can be retrieved directly from any location without reading through preceding data sequentially.
A broad category of computer data storage systems, especially non-volatile memory, that allows any block of data to be read or written independently of its physical location and other data. The term historically contrasts with 'sequential-access storage devices' like magnetic tape.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. The term is universally technical.
Connotations
Same technical, dated connotation in both varieties.
Frequency
Extremely low frequency in general use. More likely found in older technical textbooks or historical discussions in both varieties.
Grammar
How to Use “direct-access storage device” in a Sentence
[The/This/Our] <direct-access storage device> (stores/holds/contains) [data/information].[A/An] <direct-access storage device> (is/acts as) (a type of/example of) [storage].Vocabulary
Collocations
Examples
Examples of “direct-access storage device” in a Sentence
verb
British English
- The system was designed to direct-access the storage device efficiently.
- (Note: Extremely unnatural; the term is almost exclusively a noun compound)
American English
- You cannot 'direct-access' a device as a verb; it's a noun.
- (Note: Extremely unnatural)
adverb
British English
- Data was stored direct-accessly. (Note: Highly non-standard and incorrect)
- The file was retrieved direct-access. (Non-standard)
American English
- The system reads data direct-access. (Non-standard)
- It operates direct-access. (Non-standard)
adjective
British English
- The direct-access storage device technology revolutionised data centres.
- We need a direct-access storage solution.
American English
- The direct-access storage device architecture is fundamental.
- They evaluated direct-access storage capabilities.
Usage
Meaning in Context
Business
Rarely used. Might appear in legacy IT procurement documents or discussions of data storage infrastructure history.
Academic
Used in computer science and information technology courses when teaching the history of storage architectures or contrasting access methods.
Everyday
Virtually never used. People say 'hard drive', 'SSD', or 'memory'.
Technical
Primary domain. Used in technical manuals, specifications, and discussions to precisely describe the data access method of a storage medium.
Vocabulary
Synonyms of “direct-access storage device”
Strong
Neutral
Weak
Vocabulary
Antonyms of “direct-access storage device”
Watch out
Common Mistakes When Using “direct-access storage device”
- Using 'direct-access storage device' to refer specifically to RAM (which is volatile). DASD typically implies non-volatile storage.
- Confusing it with 'direct attached storage' (DAS), which is a network/storage architecture, not an access method.
FAQ
Frequently Asked Questions
It is commonly abbreviated as DASD (pronounced 'daz-dee'), especially in older IBM mainframe contexts.
RAM (Random-Access Memory) is a direct-access storage device in terms of its access method. However, in technical terminology, 'DASD' historically and often specifically refers to non-volatile, direct-access storage like hard drives, not volatile RAM.
Because almost all common storage now is direct-access (HDDs, SSDs, even memory cards). The term was useful when the alternative (sequential tape) was common. Now we specify the device type (SSD, HDD) rather than its access method.
With direct-access, you can open a file from the middle of the storage immediately. With sequential-access (like a tape), you must fast-forward through all preceding data to reach it, which is much slower for random access.
A computer storage device (like a hard disk drive or SSD) where data can be retrieved directly from any location without reading through preceding data sequentially.
Direct-access storage device is usually technical in register.
Direct-access storage device: in British English it is pronounced /dɪˌrɛkt ˈæksɛs ˈstɔːrɪʤ dɪˈvaɪs/, and in American English it is pronounced /dəˈrɛkt ˈæksɛs ˈstɔrɪʤ dɪˈvaɪs/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None. This is a technical compound term.”
Learning
Memory Aids
Mnemonic
Think: 'DIRECTly go to the data' like jumping to a scene on a DVD (DASD) versus fast-forwarding through a VHS tape (sequential).
Conceptual Metaphor
A LIBRARY WITH AISLES vs. A SINGLE BOOK: A direct-access device is like a library where you can go directly to any shelf (sector). A sequential device is like a single scroll you must unwind to find a later part.
Practice
Quiz
Which of the following is NOT a typical example of a direct-access storage device?