On 2025-04-07, Peter N. M. Hansteen <pe...@bsdly.net> wrote: > On Mon, Apr 07, 2025 at 10:09:29PM +0100, TSS wrote: >> Everything is just fine until step 4, when the backup drive refuses to >> unmount. If you try to do it yourself, you see: >> >> umount: /my_backup_mount_point: Device busy > > This invariably means some process has one or more files open in > the file system. > > A now-forgotten shell in an xterm that happens to be cd'd into a > directory on there will be enough. I would check whether you have > something running that you have forgotten -- ps waux could be useful > to see whether there is something running that should be moved out of > the way.
but... On 2025-04-07, TSS <t...@mg-1.uk> wrote: > I'm not sure how to debug the problem since fstat shows no open file on the > drive, The only thing I know of that won't show in fstat that would result in this is if something is mounted on a subdirectory of that fs. -- Please keep replies on the mailing list.
