My system has an SSD (120 gb) and HDD (3 tb).
I am dual-booting Ubuntu 12.10 and Windows 8. Right now I only have 30 gb allocated to Ubuntu on the SSD. The rest of the SSD and HDD drive is used by Windows.
I've mounted the Windows drive (NTFS partition) in Ubuntu, and have been using it comfortably in Ubuntu as a data storage partition (for media files, etc). Am I taking a big performance hit using the NTFS partition (vs using the more preferred Ext4)? The alternative is to resize the Windows partition and add new Ext4 one for just Ubuntu data storage purposes.