A. One of the problems with the welcome addition of the disk defragmenter in Windows 2000 is that it has no command-prompt equivalent. As a result, you can't easily schedule the defragmenter to run. To address this problem, Microsoft included defrag.exe in Windows XP for command-level disk defragmentation.
An example analysis execution shows
C:\>defrag d: -a Windows Disk Defragmenter Copyright (c) 2001 Microsoft Corp. and Executive Software International, Inc. Analysis Report 6.91 GB Total, 6.73 GB (97%) Free, 2% Fragmented (5% file fragmentation)
The command format is
defrag <volume> \[-a\] \[-f\] \[-v\] \[-?\] volume drive letter or mount point (d: or d:\vol\mountpoint) -a Analyze only -f Force defragmentation, even if free space is low -v Verbose output -? Display this help text