I run Ubuntu 16 Desktop as host and on VirtualBox running Ubuntu 16 Server as guest which is using raw partition on another disk different from the one used by the host.
I am searching for a solution which will allow me to have safe read-write access to the guest's FS (or at least to some directory on the guest partition!). I'd like to know for each opportunity even if it will sacrifice some ext4 features (security/performance) and will result in actually unsafe FS on the guest side.
I am not experienced in the Unix environment but I guess that it is achievable trough proper mounting configuration for the host partition (from fstab) and proper root mounting on the guest side.
I have tried by mounting on both sides with "defaults" option but when I create file from the host it is not showing on the guest FS, however it is read-write accessible from the host! When file is edited it is not actually reflecting on the guest.