Comment # 6 on bug 972394 from Matthias Klostermair

About mount from journal:

nohostname:/home/disk # journalctl | grep mount
Apr 06 22:21:50 nohostname kernel: EXT4-fs (dm-0): mounted filesystem with
ordered data mode. Opts: (null)
Apr 06 22:21:50 nohostname systemd[1]: Started Remount Root and Kernel File
Systems.
Apr 06 22:21:50 nohostname audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295
ses=4294967295 msg='unit=systemd-remount-fs comm="systemd"
exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Apr 06 22:21:50 nohostname kernel: EXT4-fs (dm-0): re-mounted. Opts:
acl,user_xattr
Apr 06 22:21:51 nohostname systemd[1]: tmp.mount: Directory /tmp to mount over
is not empty, mounting anyway.
Apr 06 22:21:51 nohostname kernel: EXT4-fs (dm-2): mounted filesystem with
ordered data mode. Opts: acl,user_xattr
Apr 06 22:21:51 nohostname kernel: EXT4-fs (sdb1): mounted filesystem with
ordered data mode. Opts: (null)
Apr 06 22:21:53 nohostname sudo[1573]:     disk : TTY=unknown ; PWD=/home/disk
; USER=root ; COMMAND=/usr/bin/psd-overlay-helper -v 23 -l
/home/disk/.mozilla/firefox/hyoinmm5.default-backup -u
/run/user/1001/disk-firefox-hyoinmm5.default-rw -w
/run/user/1001/.disk-firefox-hyoinmm5.default -d
/run/user/1001/disk-firefox-hyoinmm5.default mountup