Barring some rootkit like setup that is actually running Ubuntu under virtualization, it is not possible to write protect part of the disk like this, so I'm looking for some kernel log messages that might shed some more light on the situation.
Barring some rootkit like setup that is actually running Ubuntu under virtualization, it is not possible to write protect part of the disk like this, so I'm looking for some kernel log messages that might shed some more light on the situation.