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NTFS file size

Posted on 2008-10-08
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Hi,

I have a server which functions as RIS server. Today I've noticed that for whole catalog with RIS "size" is bigger then "size on disc" can you explain me why? We don't use compression. There are also other folders like that so it not a "problem" with RIS. I always thought that this should be equal or the other way around "size on disk" will be bigger then "size" which depends on the size of a cluster.

Thank you.
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Question by:kamsuj
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RIS has the ability to use "single instance storage" so if for example a particular file is contained in multiple RIS images, in reality RIS only keeps a single copy - not one for each RIS image - most of the Windows System files will fall into this category - hence the difference in size.
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