Read-only file system, with 30Gb of space to spare

v 5.11, running on VMWare ESXi. 2 node-cluster w/ vCenter and an NFS san for a Datastore. No other VMs are showing any indication that they are having r/w issues w/ the storage (there are nearly 20 VM’s).

At least once, sometimes twice a day, HA will stop working and I will get “Read-only file system” issues. If I am able to do any digging at all via SSH, it’s always disk-related errors, “Journal aborted”, etc. Most of the time I can’t even get in via SSH because it can’t create a temp file to let me in, so I have no idea what’s actually going on. Rebooting the VM clears up the issues. Need to find the root cause and fix it.

Any help would be greatly appreciated.