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've also been bitten lots of times in lots of different software by leftover signatures on block devices so I do try to remember to wipefs them when I am done and I'm kicking myself I didn't think of that here! Glad the mystery is solved though. Thanks, Andy -- https://bitfolk.com/ -- No-nonsense VPS hosting -- GLLUG mailing list [email protected] https://mailman.lug.org.uk/mailman/listinfo/gllug
