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The following is the case and question: I have a linux installation on a 128GB sandisk. When I clone the disk on another 128GB sandisk the UUID stays the same. My first thoughts to detect a clone was to check the UUID but that clearly does not work.

So my question is: How can I detect that the cloned USB is actually a clone? Is there any way to uniquely identify the USB disk device itself given that your booting from it and not inserting it in the USB port of another linux system?

sifuray
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  • The physical drive should have a distinct serial number. If you save it on the original then it won't match on the copy. – stark Feb 28 '22 at 12:24
  • Thats what I though. However, after doing a dd of the USB (org) to another USB (clone), when booting of either USBdisk and checking with the command blkid, I get the same UUID. After booting with the clone (created with dd) I want to be able to detect that I am not in the original. So naturaly I though of UUID. But the UUID is the same because it is a dd copy. The UUID was created during the creation of the diskstructure when the installation was done. Is there a way to detect that I have started a clone (dd copy) and that I am not in the original USBdisk? – sifuray Mar 01 '22 at 07:09

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