Suspended ZFS pool affects all other VMs on node (even if no vDisks are affected)

tburger

Active Member
Oct 13, 2017
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Hello all,

I have a situation here and I hope that someone can help me with this.

My setup is running 3 individual ZFS pools. All are attached locally via a SAS HBA (actually they are SATA HDDs, no Expanders).
One of those ZFS pools only holds temporary data and I couldn't care less of it. 3 of my VMs have ZVOLs on it.
My expectation is, that a ZFS pool having issues only would affect those 3 VMs (with a relationship to it).

However that is not the case.
A few days ago it seems that this ZPOOL with temporary data was suspended due to IO-Errors.
Screenshot from 2020-05-20 14-02-11.png

Some hours after the initial problem (according to the logs, 4-6 hrs later) all my VMs "crashed". They were not responsive anymore (IP-connections failed, etc...)

I have checked the console and every single VM looked like this:
Screenshot from 2020-05-20 14-02-45.png

The host itself is running fine. No problems I have recognized.
Rebooting the host (shutting the VMs via "sudo qm shutdown <id> -forceStop" first) solved all the issues and the whole system is operating normally again.

Has anyone experienced something like this or an explanation for the behavior I am seeing?
Thanks for your help all the best
 

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