Disk Compression Mayhem After spending 36 hours waiting for the â€œmergeâ€ to complete (read CelticTechâ€™s post and my previous posts), the process hung up. Rather than attempting to start the process over, I trashed the VM and restored a back-up copy. Somehow, either due to the Parallels Image Tool or something with the hang, 3-4GB of hard drive space is no longer available. Itâ€™s â€œfullâ€ and I canâ€™t figure out where the files are that could be causing this. So, this morning, I thought I would take a shot at upgrading Parallels to version 4.0, migrating the VM from the back-up and see if I could get the Compressor to work. Alas, it does not. When I run the Parallels Compressor I receive the following message: â€œThe virtual hard disk cannot be compressed. Make sure the virtual machine does not have snapshots, the virtual hard disk is not a plain disk, nor a Boot Camp partition, and that you are not working in safe mode.â€ I have not tried CelticTechâ€™s process for compressing the disk. Although, Iâ€™ve tried every conceivable combination to get this to run and have spend hours reading forums and troubleshooting guides, Iâ€™ve hit a wall. How does one get the disk compressor to work in Parallels 4.0.3810? I have limited hard disk space and am running out of patience.