The problem has now disappeared after the last reboot. Before it, I did this upgrade:
Start-Date: 2017-04-01 02:25:04 Commandline: apt-get dist-upgrade --yes Requested-By: simple (1000) Upgrade: python-samba:amd64 (2:4.3.11+dfsg-0ubuntu0.16.04.5, 2:4.3.11+dfsg-0ubuntu0.16.04.6), libwbclient0:amd64 (2:4.3.11+dfsg-0ubuntu0.16.04.5, 2:4.3.11+dfsg-0ubuntu0.16.04.6), makedev:amd64 (2.3.1-93ubuntu1, 2.3.1-93ubuntu2~ubuntu16.04.1), samba:amd64 (2:4.3.11+dfsg-0ubuntu0.16.04.5, 2:4.3.11+dfsg-0ubuntu0.16.04.6), samba-dsdb-modules:amd64 (2:4.3.11+dfsg-0ubuntu0.16.04.5, 2:4.3.11+dfsg-0ubuntu0.16.04.6), samba-libs:amd64 (2:4.3.11+dfsg-0ubuntu0.16.04.5, 2:4.3.11+dfsg-0ubuntu0.16.04.6), libpam-winbind:amd64 (2:4.3.11+dfsg-0ubuntu0.16.04.5, 2:4.3.11+dfsg-0ubuntu0.16.04.6), winbind:amd64 (2:4.3.11+dfsg-0ubuntu0.16.04.5, 2:4.3.11+dfsg-0ubuntu0.16.04.6), samba-common:amd64 (2:4.3.11+dfsg-0ubuntu0.16.04.5, 2:4.3.11+dfsg-0ubuntu0.16.04.6), libnss-winbind:amd64 (2:4.3.11+dfsg-0ubuntu0.16.04.5, 2:4.3.11+dfsg-0ubuntu0.16.04.6), samba-vfs-modules:amd64 (2:4.3.11+dfsg-0ubuntu0.16.04.5, 2:4.3.11+dfsg-0ubuntu0.16.04.6), libsmbclient:amd64 (2:4.3.11+dfsg-0ubuntu0.16.04.5, 2:4.3.11+dfsg-0ubuntu0.16.04.6), smbclient:amd64 (2:4.3.11+dfsg-0ubuntu0.16.04.5, 2:4.3.11+dfsg-0ubuntu0.16.04.6), samba-common-bin:amd64 (2:4.3.11+dfsg-0ubuntu0.16.04.5, 2:4.3.11+dfsg-0ubuntu0.16.04.6), wget:amd64 (1.17.1-1ubuntu1.1, 1.17.1-1ubuntu1.2) End-Date: 2017-04-01 02:25:28 But I can't spot anything related to the issue. The message "*** /dev/sda1 will be checked for errors at next reboot ***" does not show up no more, and all the logs are ok: root@serverlinux:~# cat /run/initramfs/fsck.log Log of fsck -C -a -T -t ext4 /dev/sda1 Thu Apr 6 00:26:08 2017 /dev/sda1 has been mounted 31 times without being checked, check forced. /dev/sda1: 646203/6725632 files (1.8% non-contiguous), 17524868/26880000 blocks Thu Apr 6 00:26:16 2017 ---------------- root@serverlinux:~# LANG=en_US dumpe2fs /dev/sda1 | grep -5 "Mount count" dumpe2fs 1.42.13 (17-May-2015) RAID stride: 32738 Flex block group size: 16 Filesystem created: Thu Apr 15 15:23:07 2010 Last mount time: Thu Apr 6 02:26:17 2017 Last write time: Thu Apr 6 02:26:08 2017 Mount count: 1 Maximum mount count: 31 Last checked: Thu Apr 6 02:26:08 2017 Check interval: 15552000 (6 months) Next check after: Tue Oct 3 02:26:08 2017 Lifetime writes: 5342 GB "Mount count" and "Last checked" are now up to date (can't figure out why). -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1677305 Title: /dev/sda1 is checked at every boot instead of once every N mounts Status in systemd package in Ubuntu: Confirmed Bug description: Every time I login I get the message: *** /dev/sda1 will be checked for errors at next reboot *** /dev/sda1 is my root partition. fsck was successfully run, but it looks like systemd is not aware of this, so fsck will be run again at the next boot. root@serverlinux:~# lsb_release -rd Description: Ubuntu 16.04.2 LTS Release: 16.04 root@serverlinux:~# LANG=en_US apt-cache policy systemd systemd: Installed: 229-4ubuntu16 Candidate: 229-4ubuntu16 Version table: *** 229-4ubuntu16 500 500 http://it.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 100 /var/lib/dpkg/status 229-4ubuntu10 500 500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages 229-4ubuntu4 500 500 http://it.archive.ubuntu.com/ubuntu xenial/main amd64 Packages root@serverlinux:~# cat /run/initramfs/fsck.log Log of fsck -C -a -T -t ext4 /dev/sda1 Wed Mar 29 00:26:26 2017 /dev/sda1: clean, 612205/6725632 files, 17326020/26880000 blocks (check in 2 mounts) Wed Mar 29 00:26:26 2017 ---------------- root@serverlinux:~# LANG=en_US ls -l /run/initramfs/ total 4 -rw-r--r-- 1 root root 0 Mar 29 02:26 fsck-root -rw-r--r-- 1 root root 194 Mar 29 02:26 fsck.log [There's a discrepancy between the time in fsck.log and the time of the fsck.log but I suspect this is a UTC/CEST issue: root@serverlinux:~# LANG=en_US date Wed Mar 29 17:43:17 CEST 2017 root@serverlinux:~# LANG=en_US date -u Wed Mar 29 15:43:21 UTC 2017 The system was planned for reboot at Mar 29 2:25 CEST (Mar 29 0:25 UTC)] This is the content of /etc/fstab: root@serverlinux:~# cat /etc/fstab # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 # / was on /dev/sda1 during installation UUID=c50edc7d-9f0b-4958-8e44-00bb5433ba42 / ext4 errors=remount-ro,noatime,nodiratime,commit=60 0 1 # swap was on /dev/sda5 during installation UUID=93b413bc-8663-44b4-81de-1a225a2f90da none swap sw 0 0 # /dev/sdb1 in ext4 250GB UUID=5f987a15-685a-4d2b-adf9-8bcde0eca04e /data ext4 errors=remount-ro,noatime,nodiratime,commit=60 0 1 The output of dumpe2fs on /dev/sda1 is: root@serverlinux:~# LANG=en_US dumpe2fs /dev/sda1 (...) Filesystem created: Thu Apr 15 15:23:07 2010 Last mount time: Wed Mar 29 02:26:26 2017 Last write time: Wed Mar 29 02:26:26 2017 Mount count: 30 Maximum mount count: 31 Last checked: Tue Sep 6 02:46:17 2016 Check interval: 15552000 (6 months) Next check after: Sun Mar 5 01:46:17 2017 (...) For some reason, "Last checked:" time is not up to date (see above for the content of /run/initramfs/fsck.log), hence the problem (I suppose). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1677305/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp