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alternative to DD11 for Win8

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I've been using DD for a few years on older machines and have been very happy with it. But from what I read it won't work on my new Win8 machine. I want to shrink the C: partition, and the Windows Disk Management lets me do that, but it won't shrink beyond a certain size, and I want it much smaller than that size. Not sure what prevents it from getting smaller, perhaps there's a section of the partition that's used and it won't move those files to make it smaller.

So what's the alternative that will work on Win8, and will shrink partitions by moving files if necessary? I've made a GParted disk with the latest version 0.16.1, which claims to be Win8 compatible, but I'm not sure if that will do what I want reliably. Figured I ask first, rather than just try something and be sorry later.

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Windows 8 Disk Management will only resize the partition smaller if the data space occupied on the disk is moved closer to the beginning of the partition.

I have had good luck by temporarily turning off hibernation (effectively deleting the hiberfil.sys file) and disabling the Windows page file, deleting the user temp files, deleting the Windows temp files, cleaning out the prefetch (*.pf) files in C:\Windows\Prefetch, disabling System Restore, and then performing a defragmentation.

Be sure to re-enable the Page file, System Restore, and turn Hibernation back on after the resize. Make sure you have left enough space on the resized partition for these items as well as additional space for Windows and applications to create temp files.

Using GParted works well, but can be a little slow.

Regardless as to the method you use to do this, be SURE to have a full disk image before beginning this project, as there is no guarantee that you would not have any problems or data loss.

Also be sure that you have your system plugged into a known good fully charged UPS (battery backup) before starting.

I had a similar issue when I was moving my operating system from a Mechanical Hard Disk to an SSD. Now this was with Windows Vista, the most disk hungry Operating system ever, What I did was go into my system and reduced the Pagefile to ZERO, Into Admin and turned of Hybernate in system resources. used Windows own disk management to resize it down to the bare minimum in the environment available, made sure all my temp files were clearand did a windows cleanup. I moved my Music data to another Disk and partition by both copying and pasting the directory into the drive destination and right clicking on the Music Directory in the USER folder and changing the path to the new folder. Backed up my userdata and documents.
I booted into another OS which was Windows 7 at the time and used DD11 to resize it down to the basic value I needed to get onto my new drive. I went from using a 240GB drive down to 120GB just by doing this and after a reboot onto the Vista Drive I found the OS still operating at peak efficiency. I then Used True Image to backup the drive and then did a restore onto the SSD. Vista doesn't have TRIM support so it was important to me to remove unneeded files that would slow down the system on an SSD. Windows 8 has TRIM support built in so there is no need to switch off the system defragmenter or Optimizer in the OS. Each Operating system has its loopholes that create hurdles for the kernal to get around. Just make sure you back up the MBR. Or when exchanging Hard Disks you could do a simple clone with True Image.