Methods named "Defrag" and "DefragAnalysis" (part of Win32_Volume) are used to manage the Defrag utility included...
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with Windows Server 2003.
Microsoft TechNet Script Center provides a nice example for Analyze Volume Defragmentation. The Technet Script Center Repository also has an example for how to defrag a Windows Server 2003 system using WMI:
strComputer = "."
Set objWMIService = GetObject("winmgmts:\" & strComputer & "rootcimv2")
Set colVolumes = objWMIService.ExecQuery _
("Select * from Win32_Volume Where Name = 'D:\'")
For Each objVolume in colVolumes
errResult = objVolume.Defrag()
Using this information, I created a script to enumerate all local hard drives and to check each one sequentially to see if it needs to be defragmented (TotalPercentFragmentation > 10%). If so, run Defrag. All information is written to the event log.
If you have any questions, you can e-mail the author of this tip at firstname.lastname@example.org.
ABOUT THE AUTHOR: Greg Ramsey has been working with SMS and desktop deployment since 1998. He currently works for a state agency in Columbus, Ohio. He has extensive knowledge in VBScript (including ADSI, WSH and WMI), Visual Basic, SMS Installer and good 'ol batch files. He is also the team lead for creating and managing both unattended builds and image-based installations using SysPrep.
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