When copying large files or testing writespeed with
dd, the max writespeed I can get is about 12-15MB/s on drives using the NTFS filesystem. I tested multiple drives (all connected using SATA) which all got writespeeds of 100MB/s+ on Windows or when formatted with ext4, so it's not an alignment or drive issue.
top shows high cpu usage for the
AMD dual core processor (2.2 GHz)
ntfs-3g version: both
2012.1.15AR.1 (Ubuntu default version) and
How can I fix the writespeed?