# What does STONITH do at the OS level?

**URL:** <https://forums.suse.com/t/what-does-stonith-do-at-the-os-level/34029>\
**Category:** General\
**Created:** [June 3, 2019, 6:47pm UTC](https://forums.suse.com/t/what-does-stonith-do-at-the-os-level/34029 "2019-06-03T18:47:48Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Academy\_Instructor](https://avatars.discourse-cdn.com/v4/letter/a/9d8465/32.png) [@Academy\_Instructor](https://forums.suse.com/u/Academy_Instructor)\
**Post date:** [June 3, 2019, 6:47pm UTC](https://forums.suse.com/t/what-does-stonith-do-at-the-os-level/34029/1 "2019-06-03T18:47:48Z")

</div>

When you do “Shoot the other node in the head “- what exactly is executed on OS level?

---

<div class="post-metadata">

**Author:** ![Academy\_Instructor](https://avatars.discourse-cdn.com/v4/letter/a/9d8465/32.png) [@Academy\_Instructor](https://forums.suse.com/u/Academy_Instructor)\
**Post date:** [June 3, 2019, 6:48pm UTC](https://forums.suse.com/t/what-does-stonith-do-at-the-os-level/34029/2 "2019-06-03T18:48:47Z")

</div>

The exact process depends on the STONITH device. For SBD, disk based fencing, pacemaker writes a poison pill to the slot of the node to be fenced and the node takes the pill and dies.