Windows XP defrag program has a commandline interface. This means you can use XP's scheduler to automate the defragmenting of your partitions. To get the options for defrag:
C:\>defrag
Windows Disk Defragmenter
Copyright (c) 2001 Microsoft Corp. and Executive Software International, Inc.
Usage:
defrag [-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
When I defrag the C: partition:
C:\>defrag c: -f
Windows Disk Defragmenter
Copyright (c) 2001 Microsoft Corp. and Executive Software International, Inc.
Analysis Report
4.98 GB Total, 2.69 GB (54%) Free, 4% Fragmented (8% file fragmentation)
Defragmentation Report
4.98 GB Total, 2.69 GB (54%) Free, 0% Fragmented (0% file fragmentation)
In the following, I schedule the C: partition to be defragged at 6pm, D: at 7pm, and E: at 8pm.
C:\>at 18:00 /interactive /every:M,T,W,Th,F,S,Su "defrag c: -f"
Added a new job with job ID = 1
C:\>at 19:00 /interactive /every:M,T,W,Th,F,S,Su "defrag d: -f"
Added a new job with job ID = 2
C:\>at 20:00 /interactive /every:M,T,W,Th,F,S,Su "defrag e: -f"
Added a new job with job ID = 3
C:>at
Status ID Day Time Command Line
-------------------------------------------------------------------------------
1 Each M T W Th F S Su 6:00 PM "defrag c: -f"
2 Each M T W Th F S Su 7:00 PM "defrag d: -f"
3 Each M T W Th F S Su 8:00 PM "defrag e: -f"
