I have an Adaptec RAID 3805 controller with several SATA 7200rpm 1.5TB drives in RAID5. The volume is formatted with NTFS with default allocations, compression enabled under Windows 7 Professional x64. When I copied a 10GB file from my Mac Pro running Mac OS X 10.6.7 via "cp -av" to the smb share, this is the graph that resulted. Can anyone explain why? There was no other load on the system or network, which is gigabit: