/data/project/cache.img /data/project/cache ext4 discard,defaults,nofail 0 2

May 17 01:09:44 hn systemd-fstab-generator[334]: Checking was requested for "/data/project/cache.img", but it is not a device.
May 17 01:09:44 hn systemd[1]: Mounting /data/project/cache...
May 17 01:09:44 hn systemd[1]: Mounted /data/project/cache.
--- reboot issued ---
May 17 01:21:25 hn systemd-fstab-generator[14467]: Checking was requested for "/data/project/cache.img", but it is not a device.
May 17 01:21:30 hn systemd-fstab-generator[14758]: Checking was requested for "/data/project/cache.img", but it is not a device.
May 17 01:21:31 hn systemd-fstab-generator[14783]: Checking was requested for "/data/project/cache.img", but it is not a device.
May 17 01:21:33 hn systemd-fstab-generator[15701]: Checking was requested for "/data/project/cache.img", but it is not a device.
May 17 01:21:33 hn systemd-fstab-generator[15724]: Checking was requested for "/data/project/cache.img", but it is not a device.
May 17 01:22:46 hn systemd[1]: Unmounting /data/project/cache...
May 17 01:22:46 hn umount[18509]: umount: /data/project/cache: target is busy.
May 17 01:22:46 hn systemd[1]: data-project-cache.mount: Mount process exited, code=exited status=32
May 17 01:22:46 hn systemd[1]: Failed unmounting /data/project/cache.