If you want to manually start or stop a RAID consistency check in Linux it’s quite simple.
Starting a check on md0:
root@desktop:~# echo check > /sys/block/md0/md/sync_action
Stopping a check on md0:
root@desktop:~# echo idle > /sys/block/md0/md/sync_action
If you’re using Debian (or a Debian based distro, e.g. Ubuntu), there is a script to do this.