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Data access refers to a user’s ability to access or retrieve data stored within a database or other repository. Users who have data access can store, retrieve, move or manipulate stored data, which can be stored on a wide range of hard drives and external devices.
Techopedia Explains Data Access
There are two ways to access stored data: random access and sequential access. The sequential method requires information to be moved within the disk using a seek operation until the data is located. Each segment of data has to be read one after another until the requested data is found. Reading data randomly allows users to store or retrieve data anywhere on the disk, and the data is accessed in constant time.
Oftentimes when using random access, the data is split into multiple parts or pieces and located anywhere randomly on a disk. Sequential files are usually faster to load and retrieve because they require fewer seek operations.
