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diskpart shrink limit

I have a 250GB disk of which vista is using 40GB. I tried using diskpart shrink to reduce my partition to just 50 (i.e. the command should be shrink desired=200000), however diskpart does not allow me to shrink so much, it keeps telling "the specified shrink size is too large" even with sizes like 100000.
I have read somewhere that the maximum you can shrink this way is 4GB. Is this true? Is there any way of overcoming this limit?
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Mercuriano
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Mercuriano
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MercurianoAuthor Commented:
Some more facts: shrink querymax says that I can reclaim 179GB, but only 40GB are being used. Why this difference?
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MercurianoAuthor Commented:
Investigating with the Disk Adminiistration within Vista, I get the same limits, plus a note saying that the space available for the shinking can be reduced if paging is enabled on the volume. Of course, being this my only disk, paging is enabled, but this eats up only 8GB, how to explain the large difference between what is really available on the disk and what I can reclaim with shrink?
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MercurianoAuthor Commented:
I have followed all the steps in the suggested link,everything worked fine and this way I could reduce to 30GB the space used, but still, I cannot shrink mothe than a few GB more, far away from the theoretical limit.

Any other idea?
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LeeTutorretiredCommented:
When I was dissatisfied with the built-in Disk Partitioning tool's performance in Vista, and also when I needed to move some unallocated space to the right of another partition I wanted to extend,  the program I've used for this purpose is Boot-It NG:

http://www.terabyteunlimited.com/bootit-next-generation.htm

You can download and try the program free for 30 days.  It has a built-in program to burn a CD with the program on it.  After you do that, you don't need to install it on your hard drive, but can boot from it and run it from the CD.  It's a rather "geeky" tool, with an old DOS style format, but it's fairly easy to use.  There are lots of videos and tutorials you can look at on this page:

http://www.terabyteunlimited.com/support-bootit-next-generation.htm
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