Make exact clones of raw disk images, independenty of the OS, with OSFClone
OSFClone is a free and powerful program that lets you create bootable and precise raw disk images no matter what OS you use, even to Advance Forensics Format and Expert Witness Compression Format, making it easy for experts to diagnose problems.
Images created by OSFClone can be mounted with OSFMount.
OSFClone supports the DC3DD format that facilitates forensic analysis of a drive and verify the exactness of the clone.
OSFClone makes clones that retain fragmentation, slack space, recycled files, etc.