EXT4 fs (sda2) error count since last fsck (4233660)

Logs show the following errors:

Dec 21 11:55:11 example-server kernel: EXT4-fs (sda2): error count since last fsck: 7

Dec 21 11:55:11 example-server kernel: EXT4-fs (sda2): initial error at time 1524389586: ext4_journal_check_start:56

Dec 21 11:55:11 example-server kernel: EXT4-fs (sda2): last error at time 1524391685: ext4_journal_check_start:56

Step 1 - Insert installation media as an .iso into the virtual machine (VM) or as physical media in the form of a disc or USB device into the Syslog-ng Store Box (SSB) appliance. (note - the installation media must match the version of the VM or SSB appliance currently being run)

Step 2 - Reboot the VM or SSB appliance ensuring that upon boot the installation media is used as the primary boot device.

Step 3 - Select "Recovery shell" from the installer menu.

Step 4 - After the recovery shell was selected, a question will pop up (the same question as at install, which asks if all data wanted to be deleted).

This could be very confusing, but by pressing ctrl + c the question will be gone and a shell will appear.

Step 5 - Run fsck from within the "Recovery shell" using the following command:

fsck /dev/sda2

Step 6 - Once done, reboot the VM or SSB appliance without the installation media. The errors should cease.