Prepare your diskfile by zero-ing out the empty space in the diskfile and compact it before converting.optimize your working physical disks first, a highly fragmented file on an HDD can take much longer than a disk where the files have been compacted and defragmented.For this reason I always create my diskfiles as a single file instead of multiple files which is often the default (typically 2GB files which presumably is for deploying on 32bit file systems).
Consolidate your diskfile into one file.BTW - It’s why I generally build my Production machines to use the “raw” disk format, although it might perform a little less than whatever the recommended might be, it’s universally recognized by all virtualization. If you’re not sure whether you found the right utility, post here and ask first. If the current disk format is not supported or you just want to change to something else, then do a search “convert … to …” and run the utility. If it is, then copy the diskfile and try to create a virtual machine using it. Check first whether your current disk format is supported by your new virtualization.
