Linux VM death without any infomation

My linux (ubuntu) VM sometime get OS disk corrupt, remount to read-only and have to run fsck to check the disk. Sometimes fsck work, but sometimes, when it tried to fix the disk, it deleted the file which can be system file or database file.

This happen for the VM disk on NFS.

Please help.

Thanks for all your troubles

Host OS: Ubuntu 18.04
Software: Opennebula 5.6 with KVM
Other: FreeNas 11.1

Do you have latest ubuntu kernel installed?

It sounds like you are hitting a silent data corruption bug in the host if your kernel version is less than 4.15.0-38.41.

Hope this helps.

Best Regards,
Anton Todorov

thanks for your reply. for me, it seem like it come from nfs server, which may not have enough bandwidth for our servers. i’m trying to use local disk instead.