| defrag | new in WS2003 |
defrag Volume [/a] [/v] [/f]
Volume
The drive letter or mount point of the volume to defragment
/a
Performs a fragmentation analysis only and displays a summary report
/v
Verbose analysis report
/f
Forces defragmentation even if free space is low
Check volume E: for fragmentation:
defrag e: /a Windows Disk Defragmenter Copyright (c) 2002 Microsoft Corp. and Executive Software International, Inc. Analysis Report 502 MB Total, 60 MB (11%) Free, 1% Fragmented (2% file fragmentation) You do not need to defragment this volume.
Get verbose information about fragmentation:
defrag e: /v Windows Disk Defragmenter Copyright (c) 2002 Microsoft Corp. and Executive Software International, Inc. Analysis Report Volume size = 502 MB Cluster size = 512 bytes Used space = 442 MB Free space = 60 MB Percent free space = 11 % Volume fragmentation Total fragmentation = 1 % File fragmentation = 2 % Free space fragmentation = 0 % File fragmentation Total files = 781 Average file size = 611 KB Total fragmented files = 8 Total excess fragments = 19 Average fragments per file = 1.02 Pagefile fragmentation Pagefile size = 0 bytes Total fragments = 0 Folder fragmentation Total folders = 1,256 Fragmented folders = 1 Excess folder fragments = 36 Master File Table (MFT) fragmentation Total MFT size = 2 MB MFT record count = 2,052 Percent MFT in use = 97 Total MFT fragments = 3
Defragment E: drive:
defrag e: Windows Disk Defragmenter Copyright (c) 2002 Microsoft Corp. and Executive Software International, Inc. Analysis Report 502 MB Total, 60 MB (11%) Free, 1% Fragmented (2% file fragmentation) Volume New Volume (E:) has only 11% free space available for use by Disk Defragmenter. To run effectively, Disk Defragmenter requires at least 15% usable free space. There is not enough disk space to properly complete the operation. Delete some unneeded files on your hard disk, and then try again.
Force defragmentation even though free space is low:
defrag e: /f Windows Disk Defragmenter Copyright (c) 2002 Microsoft Corp. and Executive Software International, Inc. Analysis Report 502 MB Total, 60 MB (11%) Free, 1% Fragmented (2% file fragmentation) Defragmentation Report 502 MB Total, 60 MB (11%) Free, 0% Fragmented (0% file fragmentation)
You can't run the defrag command and the Defragmenter tool in Computer Management at the same time.
A minimum of 15% free space is required on volumes to completely defragment them. Forcing a defragmentation when there is less free space often results in partial defragmentation.
To stop the defragmentation process, type Ctrl-C.
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