Contiguous disk space allocation method

Contiguous disk space allocation method:

In contiguous disk space allocation method, files are assigned to contiguous areas of secondary storage. A user specifies in advance the size of the area needed to hold a file to be created. If the desired amount of contiguous space is not available, the file cannot be created.

Two most common strategies are: First fit,  Best fit.

First fit: In this case as soon as the first hole (that is big enough) is encountered, searching is stopped and memory is allocated for creating a file.
Searching can start either at the beginning of the set of holes or where the previous first-fit search ended.

Best fit: In this case the entire list is searched for and the smallest hole, that is big enough, is allocated for creating a file.

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