Systemd timer for BTRFS Scrub. Usage: systemctl enable btrfs-scrub@pictures.timer

btrfs-scrub-pictures

# /etc/conf.d/btrfs-scrub-pictures

mountpoint=/data/pictures

btrfs-scrub@.service

# /etc/systemd/system/btrfs-scrub@.service

[Unit]
Description=Scrub BTRFS filesystem (%i), check volume for errors
Documentation=man:btrfs-scrub
# After=fstrim.service

[Service]
Type=oneshot
EnvironmentFile=/etc/conf.d/btrfs-scrub-%i
ExecStart=/usr/sbin/btrfs scrub start -B $mountpoint
IOSchedulingClass=idle
CPUSchedulingPolicy=idle

btrfs-scrub@.timer

# /etc/systemd/system/btrfs-scrub@.timer

[Unit]
Description=Trigger BTRFS scrub on filesystem (%i)

[Timer]
OnCalendar=monthly
Persistent=true

[Install]
WantedBy=timers.target

Reload sytemd process systemctl daemon-reload so we have new service and timer.
Enable timer systemctl enable btrfs-scrub@pictures.timer and systemctl enable btrfs-scrub@pictures.timer.
List all timers systemctl list-timers --all.

Hi,
when trying to launch the btrfs-scrub service manually it does not background properly and blocks the shell used to start the service. I had to removed the -B flag and set Type=forking for that to work, not sure if it has any other negative consequences though.
Greetings Benjamin

@Benjaminrenz the reason for this behavior is that the service uses Type=oneshot (the service will be in the activation state unil the command exits, the start command will wait for activation to complete).

Removing that directive will use the default simple type (which IMO is more correct). Removing the -B will allow the service to be started multiple times without the scrub compleng (which will cause the service to fail).