Tech Support > Microsoft Windows > Performance/Maintainence > Defrag issues
Defrag issues
Posted by Rickster on January 17th, 2006


Hi-
I'm looking for any/all help on this. I am running Windows XP Pro on two
250GB Western Digital SataII drives, set up in a Raid0. Everything was great
until I recently tried to run defrag. I analyzed the volume and was told "you
should defrag this volume". I did, and it ran fine. After doing it, I
analyzed the drive once again and that I was once again told "you should
defrag this volume". The same case occurred even after a complete reboot.
Does anyone have any ideas what might be causing this? Any and all help is
greatly appreciated!

Posted by Gerry Cornell on January 17th, 2006


Was it the same volume? You can only defragment one volume at a time.
To defragment the drive / partition containing Windows requires a reboot.
I
The amount of free space is very important when running Disk Defragmenter. A
minimum of 15% is required but sometimes 20% is desirable if the drive /
partition
contains one or more large files. You can run Disk Defragmenter a second and
third
time if files are still fragmented after the first run. You can put files
more prone to
fragment in their own partitions.

If you use Outlook Express regularly compacting Outlook Express before
running
Disk Defragmenter is helpful.

Disk Defragmenter provides a "Most fragmented files" list. When a fragmented
file is
larger than the largest pocket of free space available then the files is not
fragmented.
Running Disk Defragmenter a second or third time does move files around and
can
reduce / eliminate the contents of the "Most fragmented files" list. The
more free
space on the drive / partition, the more likely it is that all fragments
will be
eliminated.

Free space cannot be defragmented with the Windows XP Disk Defragmenter.
Neither can your pagefile cannot be defragmented because the file is in use
whilst
Disk Defragmenter is running. You can purchase other Defragmenting Utilities
e.g.
Perfect Disk, which will defragment your pagefile and free space. Another
option is to
place your pagefile in it's own partition. A pagefile partition is best
located as the first
partition on a second hard drive. You should leave a small page file at the
original
location.
http://www.raxco.com/

~~~~~~


Hope this helps.

Gerry
~~~~~~~~~~~~~~~~~~~~~~~~
FCA

Stourport, Worcs, England
Enquire, plan and execute.
~~~~~~~~~~~~~~~~~~~~~~~~


"Rickster" <Rickster@discussions.microsoft.com> wrote in message
newsAA8D766-0B15-40AF-ADFB-43FBA819CADB@microsoft.com...
> Hi-
> I'm looking for any/all help on this. I am running Windows XP Pro on two
> 250GB Western Digital SataII drives, set up in a Raid0. Everything was
> great
> until I recently tried to run defrag. I analyzed the volume and was told
> "you
> should defrag this volume". I did, and it ran fine. After doing it, I
> analyzed the drive once again and that I was once again told "you should
> defrag this volume". The same case occurred even after a complete reboot.
> Does anyone have any ideas what might be causing this? Any and all help is
> greatly appreciated!




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