ONTAP Hardware

RHEL VMs File system RO state after storage failover


We had an issue the other where our storage triggered failover between controllers.

During that process our Linux based VMs went in to read-only drive state (/vol/log) to avoid data loss or corruption.  

grep ro, /proc/mounts

/dev/mapper/vg_one-lv_varlog /var/log ext4 ro,seclabel,relatime,barrier=1,data=ordered 0 0


This prevents the server from functioning, we can not su to "root", thus a reboot is necessary.  

This does not affect Windows VMs or RHEL VMs that are stored on datastore via FC.  


Our setup 

Here is our setup:

NetApp Storage FAS8200- dual controller configured for HA running Ontap 9.5P4

ESXi - 6.5 datastore mounted via NFS

Redhat version 3.10.0-1062.9.1.el7.x86_64


Any assistance would be greatly appreciated.  




Have you opened a ticket with Redhat? I don't think a failover would cause any kind of corruption like that, but there isn't a way for me to begin to know your storage system and check logs. If you're concerned, feel free to open a case. I really don't think storage would be to blame here.