On Fri, 26 Sept 2025 at 12:51, Andy Smith via GLLUG <[email protected]> wrote: > > Hi, > > On Fri, Sep 26, 2025 at 09:13:12AM +0100, Henrik Morsing via GLLUG wrote: > > Debian dude has fixed it. A years-old FreeBSD instalation had left a ZFS > > signature on sdX6 (how?!) which broke things (why?). > > It breaks things because the block device has signatures indicating > multiple different things and udev picks the first one it finds (zfs in > your case). So it carried on behaving as if you have a zfs device, not > an ext filesystem. > > I suppose diagnostics could be better somehow. Or mkfs tools could > detect leftover signatures and warn about them. I've had mkfs.btrfs do > that before. >
I learnt something today. I had never heard of "wipefs", probably because I have never had a problem that needed it. I guess a more robust system would be to determine if there is ever a need to have two different fs signatures on a single partition, and if the answer is no, udev should print a friendly log message that it found more than one, and please use wipefs to delete the unneeded one. Is there a use case to have more than one? -- GLLUG mailing list [email protected] https://mailman.lug.org.uk/mailman/listinfo/gllug
