/dev/sde blipped off the bus (hardware issue?) and came back as /dev/sdq. Except btrfs won't let me scan or mount it. I was able to btrfs check it though and that came back clean. gargamel:~# ls -l /dev/sde ls: cannot access '/dev/sde': No such file or directory gargamel:~# mount /dev/sdq1 /mnt/mnt mount: /mnt/mnt: mount(2) system call failed: File exists. gargamel:~# dmesg |tail -1 [2560371.195249] BTRFS warning (device sde1): duplicate device fsid:devid for 727c7ba3-f6f9-462a-8472-453dd7d46d8a:1 old:/dev/sde1 new:/dev/sdq1 gargamel:~# btrfs device scan Scanning for Btrfs filesystems ERROR: device scan failed on '/dev/sdq1': File exists ERROR: there are 1 errors while registering devices gargamel:~# dmesg |tail -1 [2560416.434529] BTRFS warning (device sde1): duplicate device fsid:devid for 727c7ba3-f6f9-462a-8472-453dd7d46d8a:1 old:/dev/sde1 new:/dev/sdq1 gargamel:~# grep sde /proc/mounts cgroup2 /sys/fs/cgroup/unified cgroup2 rw,nosuid,nodev,noexec,relatime,nsdelegate 0 0 gargamel:~# gargamel:~# lsblk -f |grep 727c7ba3-f6f9-462a-8472-453dd7d46d8a └─sdq1 btrfs btrfs_space 727c7ba3-f6f9-462a-8472-453dd7d46d8a gargamel:~# So, that FS isn't a duplicate anymore and I see to have no way out except reboot which I'll do now. Was there another way around it? Obviously this is not desirable behaviour, in the past, I was able to remount the device when it came back. Thanks, Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Home page: http://marc.merlins.org/ | PGP 7F55D5F27AAF9D08
