Slideshow: Shrink a hard drive volume in Windows 7
by Mark Kaelin | November 23, 2011, 12:28am PST | Image 1 of 6
Open the Disk Management Tool with administrative rights
Shrink a volume
The first step is to start the Disk Management tool with elevated administrative rights. Click the Start Menu Button and type diskmgmt.msc into the search box and then right-click the diskmgmt.msc entry to get to the Run as administrator item in the context menu as shown.
This gallery is also available as a TechRepublic blog post and download. Image created by Mark Kaelin for TechRepublic.
Open the Disk Management Tool with administrative rights - Image 1 of 6
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Shrink system volume on Windows 7!
RE: A new unallocated partition (Slideshow: Shrink a hard drive volume in Windows 7)
On my system the program is "disk management" - type this in the Startup Search Box rather than diskmgmt.msc.
Your OS sees it differently, since it uses a binary system, and not a Base 10 numbering system. Thus, your operating system sees 1024 bytes = 1 KiB, and 1024 MB = 1 GiB, instead of using the disk manufacturer's figure of 1,000.
Thus, if Mr. Kaelin wanted to make a REAL 5 GB "new" partition, the size he should have entered in the new size box should have been 5,120, not 5,000. Hence, this is the reason his new partition is reported as 4.88 GB, and not 5.00 GB, which it would be if he has used 5120 MB as the size of his new partition. Do the math: 5,000 / 1024 = 4.88, and 1024 x 5 = 5120.
Also, the Windows file system (or any file system for that matter) has NOTHING to do with the lowered reported size of the partition, and EVERYTHING to do with the bad math that Mr. Kaelin used. Since it is a new partition, and labeled as "Unallocated," there is no file system on the new partition, so therefore, the Windows file system could NOT be taking up any space at all. Unallocated partitions will have to first be formatted to be utilized, and not until then will there be any loss of space on the new partition.
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