Why Is Disk Defragmentation Necessary?

By Dan DiNicolo, April 17th, 2007 Posted in System Maintenance. Subscribe to our RSS Feed

When files are saved to a hard disk, they aren’t necessarily saved in an area of contiguous disk space. For example, a 10 K file might be fragmented and spread over three disparate disk clusters, each 4 K in size. When this file is accessed, the system needs to obtain the contents of each of the clusters to open it, which would involve reading different areas of the disk for a single file. When defragmentation is performed, fragments of the same file are saved in contiguous areas of disk space, thus speeding up read access to the file and improving performance.

Written by Dan DiNicolo - Visit Website

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