Had a similar problem - mount.ntfs-3g process uses up to 80% of CPU. Finally found the reason - large files (40GB). mount.ntfs has a special option to support large files - big_writes. I updated my /etc/fstab configuration file and it works now! CPU load variates from 0 to 45%, but not constant 80% anymore.
Example of /etc/fstab file: /dev/sda1 /media/USBHDD1 ntfs noatime,big_writes 0 0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/392204 Title: Huge CPU usage by mount.ntfs process To manage notifications about this bug go to: https://bugs.launchpad.net/ntfs-3g/+bug/392204/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs