[CentOS] Two partitions with samd UUID??

On 06/14/2015 07:55 PM, Timothy Murphy wrote:
> I seem to have partitions on two different disks
> with the same UUID:
>    [tim at helen ~]$ sudo blkid /dev/sda2
>    /dev/sda2: LABEL="/boot1" UUID="5bbc8e95-6108-41f5-bc0e-5b5f8df5ce03"
>      TYPE="ext3"
>    [tim at helen ~]$ sudo blkid /dev/sdb2
>    /dev/sdb2: LABEL="/boot1" UUID="5bbc8e95-6108-41f5-bc0e-5b5f8df5ce03"
>      TYPE="ext3"
> This is causing some confusion, as these are boot partitions,
> and grub2 seems to be choosing the wrong one.
>
> I wonder how this occurred;
> I thought different partitions on different disks
> necessarily had different UUIDs?
>
> Maybe I used dd at some point.
> Would this keep the same UUID?
>
Interesting.
And I thought uuid's were supposed to be unique on a system.