On Fri, May 17, 2019 at 11:37 AM Michael Laß <bevan@xxxxxxxxx> wrote: > > > I tried to reproduce this issue: I recreated the btrfs file system, set up a minimal system and issued fstrim again. It printed the following error message: > > fstrim: /: FITRIM ioctl failed: Input/output error Huh. Any kernel message at the same time? I would expect any fstrim user space error message to also have a kernel message. Any i/o error suggests some kind of storage stack failure - which could be hardware or software, you can't know without seeing the kernel messages. -- Chris Murphy
