I have setup single node and multinode (1MN+3DN) cluster with HDP 2.6. I am using xfs filesystem on RHEL72. After deployment the setup looks good but after some time few nodes stops responding with the below error (can be seen in the console). sda5 is a root disk, hence I cant login and fix the filesystem. Reboot fixes the issue. Did check the disks and dint notice any issue with the disks.