
Now click Finish to create the new partition.You can choose any name for your partition. Name the partition in the Volume Label text box.If you plan on installing a Windows operating system to the partition, select the NTFS file system. The file system is the type of format or foundation that the storage device has. You can choose any drive letter that is not currently in use. This launches the New Simple Volume Wizard and this guides you through the installation process.Right-click the region of unallocated space and select New Simple Volume.After the Shrink is done, you will then see the region of unallocated space (shaded black).Now enter the amount that you want to shrink the hard disk by in megabytes (MB).To do this, right-click your main drive and select Shrink Volume. Among other things, Disk Utility can erase, format, repair, and partition hard drives Each partition can be formatted or left unformatted as free space for.As posted above you would need to remove it from it's enclosure thus voiding your warranty. When you shrink your hard disk, the remaining space becomes unallocated. No, you can't partition it, as it does not appear in disk utility. To create unallocated space, shrink your hard drive.This opens the Windows Disk Management utility. Type diskmgmt.msc inside the text box and press Enter. Hold the Windows key on your keyboard and press R.Enter the size and click next, and you are done.Right-click the Unpartitioned space in the bottom pane and select New Simple Volume.Select the disk from which you want to make a partition.I will personally give it a try later today.Create a partition from unpartitioned space with these steps: I Have still not tried this, but I heard of some people who managed to get this working somehow. I guess you could try following the steps found here: using your NTFS partition instead of the Samba share mentioned. Further, I say "REALLY need" because it is unsupported and someday this workaround may stop working with further releases of OS X, apart from not performing as good as a native solution ). If the Time Machine drive is on the network an AirPort Time Capsule, for example make sure that the Mac is on the same network before proceeding. HOWEVER, it seems that you actually can use a dedicated NTFS partition if you REALLY need to (In case you use a router that supports NAS and does not support the HFS+ file system nor the AFP protocol, for instance. Connect the Mac and the Time Machine drive, and turn on the Time Machine drive.

The best way to proceed, imho, would be to resize the NTFS partition and create a HFS+ one on the same disk, so you could keep your files in place while having a partition dedicated exclusively to Time Machine.
