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:
1) Open up Command Line tool.
2) Type the following: defrag –a <disk drive letter>
3) 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.