On 2020-04-01 18:07, Martin McCormick wrote:
>> Out of curiosity, I wondered what might happen if I had
>> two thumb drives containing the same UUID.
>>
Nothing bad really unless the system is supposed to boot from one of them and
both are present in the system at boot time.
I have two HDDs (main one and backup one) where partitions on the backup HDD
have the same UUIDs as partitions on the main HDD. This was done on purpose to
simplify backups and to have backup HDD to be readily available to replace the
main HDD. I copied data between the two of them many times without any issues
whatsoever.
If necessary, you can change UUID with tune2fs:
# tune2fs /dev/{device} -U {uuid}
Regards,
