abdelkader belahcene wrote: > I have a bootable usb containing on livemint distro, created by unetbootin > I want to dupplicate this pen, in another pen with enough space. > I used > dd if=/dev/sdc of=/dev/sdb bs=1M conv=noerror > > the new is not bootable, I tried install-mbr , it failed too. > any idea please, or may be use another tool The usb interface is a terrible specification. Not all usb devices are the same. It is a zoo of chaos and anarchy. If your copy is good but it still will not boot off of the second usb device then it is likely that the second usb device simply implements the spec differently from the first. The device itself is likely the limiter. This is a typical problem. Try a different usb storage device. Using conv=noerror ignores read errors. That won't guarantee that your output copy is the same as your input copy. I assume that you are using it because your original device is otherwise throwing errors. In which case that is the best that you can do but it isn't good. Bob
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