In Windows XP you had the option to analyse a disk drive you wished to defragment without carrying out a full disk defragmentation. Looking at the Windows Vista Disk Defragmenter GUI at face value I thought this feature was left out. After some research, I found that this this feature has been included but you will be forgiven for not knowing where it is. Fortunately, using the command line tool does allow you to analyse a drive. It is as simple as typing the following:
Open up Command Line tool.
Type the following: defrag –a <disk drive letter>
Press enter and you will see the following:
Microsoft Windows [Version 6.0.6000] Copyright (c) 2006 Microsoft Corporation. All rights reserved. C:\Users\Surinder>defrag -a c: Windows Disk Defragmenter Copyright (c) 2006 Microsoft Corp. Analysis report for volume C: Volume size = 298 GB Free space = 236 GB Largest free space extent = 136 GB Percent file fragmentation = 1 % Note: On NTFS volumes, file fragments larger than 64MB are not included in the fragmentation statistics You do not need to defragment this volume.
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