This article explains how and why to use "defrag" within Windows.
Product SafeGuard Device EncryptionSophos Disk Encryption
defrag volume [/a]
defrag volume [/a] [/v]
defrag volume [/v]
defrag volume [/f] Parameters
volume : The drive letter or a mount point of the volume to be defragmented.
/a : Analyzes the volume and displays a summary of the analysis report.
/v : Displays the complete analysis and defragmentation reports.
When used in combination with /a, displays only the analysis report. When used alone, displays both the analysis and defragmentation reports.
/f : Forces defragmentation of the volume regardless of whether it needs to be defragmented.
/? : Displays help at the command prompt. Remarks
defrag volume /v >filename.txt
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