Hi Nicholas Am 23.07.26 um 19:55 schrieb Nicholas D Steeves:
You're inducing a UUID collision, and this was a fs corruption footgun until the kernel introduced a check for it. UUIDs are supposed to be unique, by definition, and you need to wipefs -a $DEVICE to eliminate this collision before the second mkfs. I'm reassigning this bug to fsarchiver, because it should be running wipefs before mkfs. As an asside, this is also best practices when changing filesystems.
How do I create a UUID collision if I use it again for the same underlying device?
I would understand your argument, if I used the UUID for a different device. Interestingly, I see no such failures with mkfs.ext4 or mkfs.xfs. Regards, Michael
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