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Defragmentation is advantageous and relevant to file systems on electromechanical disk drives (hard disk drives, floppy disk drives and optical disk media). The movement of the hard drive's read/write heads over different areas of the disk when accessing fragmented files is slower, compared to accessing the entire contents of a non-fragmented ...
Unlike the Windows built-in defragmenter tool, Contig can defragment individual files, individual directories, and subsets of the file system using wildcards. Contig does not move any data except that belonging to the file in the question, so the amount it can defragment a file is limited to the largest contiguous block of free space on a system.
Drive Optimizer (formerly Disk Defragmenter) Microsoft: Bundled with Microsoft Windows: FAT16, FAT32, NTFS, ReFS Windows 2000 and later; Windows 95 and later Yes Yes Yes Yes, with Windows Task Scheduler: No No Same as Windows Diskeeper: Condusiv Technologies: Discontinued (formerly trialware: FAT16, FAT32, NTFS Windows XP and later Yes [5] Yes ...
Fixed drives USB, eSATA and removable drives RAID support [a] Shows S.M.A.R.T. attributes Hard drive self-testing Notification Notes AIDA64: Windows: Trialware [1] GUI IDE(PATA), SATA, NVMe eSATA, USB Some RAID controllers Yes No Monitoring only available in the Business Edition [2]
Solid-state drives do not physically seek, so their non-sequential data access is hundreds of times faster than moving drives, making fragmentation less of an issue. It is recommended to not manually defragment solid-state storage, because this can prematurely wear drives via unnecessary write–erase operations.
Defragmenting a disk minimizes head travel, which reduces the time it takes to read files from and write files to the disk. [1] As a result of the decreased read and write times, Microsoft Drive Optimizer decreases system startup times for systems starting from magnetic storage devices such as a hard drive.
Along with defragmentation, UltimateDefrag performs consolidation of both disk space and files within folders, arrangement of files by volatility (most often used files) or recency (most recently used files), and analysis of the disk. In addition, UltimateDefrag has the ability to defragment files based on manually entered wildcard expressions. [4]
In computer storage, fragmentation is a phenomenon in which storage space, such as computer memory or a hard drive, is used inefficiently, reducing capacity or performance and often both. The exact consequences of fragmentation depend on the specific system of storage allocation in use and the particular form of fragmentation.