Folk, This should apply equally to NO and Aos and at least partially to other systems. Back in February of 2002 Bernhard Treutwein mentioned cloning a system; the primary focus was on FAT filesystems. At the part level, provided both parts are the same size and there is enough space for an image file elsewhere, this works and is documented. Partitions.PartitionToFile IDEs#m ImageFile ~ Partitions.FileToPartition IDEt#n ImageFile ~ If the source is smaller than the target, I'm not sure the residual space on the target will be useable. If the source is larger than the target, the second command ends with a trap and the target filesystem is likely broken. Copying all files from one Aos filesystem to another is easy using these commands. System.Directory Source:* ~ FileSystem.GenCopyFiles Source: Target: ... ~ But if the objective is to clone an OS, copying files won't copy the bootloader and the inverse of Partitions.UpdateBootFile is not obvious. So can anyone help with these questions. * In the partition method, can the problems of differing source and target sizes be solved? Ie., can the filesystem be extended in the first discrepancy and terminated properly in the second? * In the filesystem method, can the BootFile be extracted from an executable part? I'll guess that with the correct block numbers Partitions.PartitionToFile dev#part file [block blocks] ~ and some editing might work. If there are any constructive answers, please consider adding them to your Web based documentation. Thanks, ... Peter E. http://carnot.yi.org/