Files fragmented after running Diskeeper
Diskeeper is an on-line defragmenter and when running in the Scheduled mode does not attempt to completely "optimize" a disk in one pass. It is designed as a "Set It and Forget It" defragmenter which runs at regular intervals, in the background, without affecting user activity. During each pass through the files on a disk, it looks at each file and determines whether the file is fragmented. If it is, and Diskeeper can defragment it, it does so. If the file is not fragmented, Diskeeper looks to see if moving the file will help consolidate free space and moves the file if it can. If a given file cannot be defragmented in this pass, there is a good chance that Diskeeper will be able to defragment it next pass since Diskeeper will look at each file in every pass.
Note that Diskeeper is designed to process disks while user jobs are active, even while user applications are accessing files on the same disk that is being defragmented. It is not necessary to take the disk off-line or allocate it to the defragmentation process. Each file is analyzed individually as Diskeeper defragments that particular file.
However, there are situations where Diskeeper will not be able to defragment a partition completely.
If a disk partition is extremely full, there may not be sufficient free space to effectively defragment the files. In this case, we recommend temporarily moving some of the files off the partition, particularly large files. This temporary measure often allows Diskeeper the "working room" it needs to complete the defragmentation process. Also, this allows Diskeeper to defragment the free space on the disk, increasing the possibility that the temporarily-moved files can be moved back to the disk in a contiguous (or at least in a less fragmented) condition.
Another cause for incomplete defragmentation is a fragmented paging file. Click here for information on
defragmenting the paging file.
A disk that has (at one time or another) been filled to capacity may have a severely fragmented Master File Table (MFT). See the White Paper entitled
Defragmentation and Windows NT Performance Benefits
for more information.
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