Hi, I have an iMac running OS X 10.5 (Leopard) with two partitions on a 1TB hard drive. The partitions each take up 500 GB with Windows Vista on one and MacOS X on the other. The Mac OS volume is now has 400 GB used but there isn't much on the Windows partition, so I am wanting to resize them to allow more space for the Mac volume. I run Time Machine and so everything is backed up on an external drive. What I want to know is can I resize the partitions without loosing data either by using Disk Utility or some other 3rd party software? If not, will my Time Machine backup be all I need to restore all my data? I read somewhere that Leopard allows dynamic partition resizing - ie. no data loss - is this true? Alastair.