A curious thing in RHEL7 (it has kind of a cache in the systemd for mounted FS)
To recreate the problemto i ha´d to change the LV linked to the FS /opt/MyfslogSD and /opt /MyfsWalComprSD after the changes in my the fstab file i re-mount the FS, but checking the log i realise that the systemd tries to unmount the FS over and over again until hours later, when there are no processes running inside.
Jul 2 14:54:17 Server1 systemd: Unit opt-MyfslogSD.mount is bound to inactive unit dev-vgdata-lvMyfslogSD.device. Stopping, too.
Jul 2 14:54:17 Server1 systemd: Unmounting /opt/MyfslogSD...
Jul 2 14:54:17 Server1 umount: (In some cases useful info about processes that use
Jul 2 14:54:17 Server1 umount: the device is found by lsof(8) or fuser(1))
Jul 2 14:54:17 Server1 systemd: opt-MyfslogSD.mount mount process exited, code=exited status=32
Jul 2 14:54:17 Server1 systemd: Failed unmounting /opt/MyfslogSD.
Jul 2 14:54:17 Server1 systemd: Unit opt-MyfslogSD.mount is bound to inactive unit dev-vgdata-lvMyfslogSD.device. Stopping, too.
Jul 2 14:54:17 Server1 systemd: Unmounting /opt/MyfslogSD...
Jul 2 14:54:17 Server1 umount: (In some cases useful info about processes that use
Jul 2 14:54:17 Server1 umount: the device is found by lsof(8) or fuser(1))
Jul 2 14:54:17 Server1 systemd: opt-MyfslogSD.mount mount process exited, code=exited status=32
Jul 2 14:54:17 Server1 systemd: Failed unmounting /opt/MyfslogSD.
[root@Server1 ~]# systemctl --all | grep opt-Postgres
opt-MyfsBackupSD.mount loaded active mounted /opt/MyfsBackupSD
opt-MyfsDataSD.mount loaded active mounted /opt/MyfsDataSD
opt-MyfsLogSD.mount loaded active mounted /opt/MyfsLogSD
opt-MyfsScriptsSD.mount loaded active mounted /opt/MyfsScriptsSD
opt-MyfsWalComprSD.mount loaded inactive mounted /opt/MyfsWalComprSD
opt-MyfslogSD.mount loaded inactive mounted /opt/MyfslogSD
After altering
fstab one should either run systemctl daemon-reload (this makes systemd to reparse /etc/fstab and pick up the changes) or reboot.[root@Server1 ~]# systemctl --all | grep opt-Postgres
opt-MyfsBackupSD.mount loaded active mounted /opt/MyfsBackupSD
opt-MyfsDataSD.mount loaded active mounted /opt/MyfsDataSD
opt-MyfsLogSD.mount loaded active mounted /opt/MyfsLogSD
opt-MyfsScriptsSD.mount loaded active mounted /opt/MyfsScriptsSD
opt-MyfsWalComprSD.mount loaded active mounted /opt/MyfsWalComprSD
