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I am new to sparse files and wondering if compression zones and sparse ranges are the same thing.

I recently learned the term compression units from here: http://www.flexhex.com/docs/articles/sparse-files.phtml

When it comes to a compressed or a sparse file, NTFS divides the file into chunks called compression units.

However in this example they have sparse ranges: https://code.msdn.microsoft.com/windowsdesktop/CSSparseFile-6e26dc97

SetSparseRange...The minimum sparse size is 64KB.

From reading elsewhere I see that NTFS disk clusters are 4kb in size and windows defines a compression unit as a collection of 16 units each 4kb... 16 * 4 == 64kb so are they the same?

I can how in Microsoft NT world they have a different term (compression units) than others (sparse ranges) but I'm not sure if I have this correct.

I am having a tough time finding thorough documentation so if you know of any resources I will gladly look into them.

TIA

GPGVM
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  • why is this question tagged c#? – Rob Dec 04 '17 at 15:37
  • because I am working with sparse files in the c# language – GPGVM Dec 04 '17 at 15:40
  • yes, but the question is nothing to do with c#, unless you have problems with c# code then use that tag. It's more to do with ntfs than c#, where's that tag? (BTW: that's where experts you need will more likely to be at.) – Rob Dec 04 '17 at 15:43

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