How to ignore monitoring a disk from the smartd daemon

Source: https://unix.stackexchange.com/a/111407/77354

-d ignore is a new directive which allows ignoring a device from DEVICESCAN.

To ignore disk /dev/sdb

sudo nano /etc/smartd.conf

add /dev/sdb -d ignore before the line that starts with DEVICESCAN ...

It should look something like this:

...
/dev/sdb -d ignore
DEVICESCAN -d removable -n standby -m root -M exec /usr/share/smartmontools/smartd-runner
...

A better alternative: -M diminishing

diminishing - send additional warning reminder emails, after a one-day interval, then a two-day interval, then a four-day interval, and so on for each type of disk problem detected. Each interval is twice as long as the previous interval.

Add -M diminishing to the line that starts with DEVICESCAN ...

...
DEVICESCAN -d removable -n standby -m root -M exec /usr/share/smartmontools/smartd-runner -M diminishing
...