JSI Tip 10109. PageDefrag freeware.


The PageDfrg help file contains:

PageDefrag 

Copyright © 1998-2000 Mark Russinovich 
SysInternals -www.sysinternals.com 

Introduction 

One of the limitations of the Windows NT defragmentation interface is that it is not possible to defragment 
files that are open for exclusive access. Thus, standard defragmentation programs can neither show you 
how fragmented your paging files or Registry hives are, nor defragment them. Paging and Registry file 
fragmentation can be one of the leading causes of performance degradation related to file fragmentation 
in a system. 

PageDefrag uses advanced techniques to provide you what commercial defragmenters cannot: the ability 
for you to see how fragmented your paging files and Registry hives are, and to defragment them. 

Using PageDefrag 

When you run PageDefrag (pagedfrg.exe) you will be presented a listbox that tells you how many clusters 
make up your paging files and Registry hives (SAM, SYSTEM, SECURITY, SOFTWARE, .DEFAULT), as 
well as how many fragments those files are in. If you feel that these files are fragmented enough to 
warrant a shot at defragmenting them, or if you want to defragment them at every boot, select the 
appropriate radio button choice and click OK. 

When you direct PageDefrag to defragment, the next time the system boots it will attempt to do so. 
Immediately after CHKDSK examines your hard drives PageDefrag uses the standard file 
defragmentation APIs (see http://www.sysinternals.com/defrag.htm for documentation of these APIs) to 
defragment the files. As it processes each file PageDefrag will print on the boot-time Blue Screen the file 
name and its success at defragmenting it. If it is successful at reducing the fragmentation it will tell you 
the number of clusters the file started with and the number it consists of after the defragmentation. 

In some cases PageDefrag may be unable to reduce fragmentation on one or more of the files, and it will 
indicate so on the boot-time Blue Screen. This can happen either because there is not enough space on 
the drive for defragmentation, or the free space itself is highly fragmented. For the best results you should 
use PageDefrag in conjunction with a commercial defragmentation utility or the free Contig defragmenter
at http://www.sysinternals.com/contig.htm. 



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