As I had just learned, the available tools would not clone that 64GB Samsung USB drive, with 59.75GB of usable space, onto a 64GB Silicon Power USB drive, with only 57.87GB of usable space. If I wanted to create any more clones of the Ubuntu installation, I would be cloning from the 32GB to a 64GB or larger USB drive, thereby avoiding the problems addressed in this post. A 32GB source drive would tend to avoid that problem: 32GB and smaller drives were a vanishing breed. As we are about to see, tools discussed here (i.e., dd and Clonezilla) could balk at efforts to clone a larger drive onto a smaller one. The Patriot was too slow for regular use, but its size was right. This post discusses the process of achieving that. I wanted to clone its contents to a 32GB Patriot USB drive. I had installed Ubuntu on a 64GB Samsung FIT USB drive. For instance, there seemed to be room for further experimentation with hybrid approaches that might combine partition- and sector-oriented techniques. Otherwise, this post is a collection of partial successes. Even with MBR (reported by GParted > Ctrl-R as “msdos”), dd would give me a “No space left on device” error but if I let it finish, the target would be bootable. This would not work if the source partitions extended beyond the target drive’s (in this example, 32GB) capacity, nor would it work if the source drive was GPT. If I could squeeze my partitions into the first 32GB of the 64GB drive and leave the rest as unallocated space, I preferred the approach of converting the 64GB drive to MBR (if it wasn’t MBR already) and then running a dd command to copy it straight over to the 32GB drive. In this case, I was trying to reduce a 64GB drive to a 32GB drive, but the general ideas would apply to any large-small pairing.Ĭlonezilla seemed to be a good place to start for most purposes, though potentially complicated (see e.g., jaylweb comment at SuperUser). I experimented with Linux and Windows tools that seemed like they might be able to clone a bootable Ubuntu installation from a larger source drive to a smaller target drive.
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