I've also experienced very slow USB transfers, with CPU waiters piling up. The odd thing is that USB-to-USB transfers go at about four times the speed of HDD-to-USB transfers. On average I get 2MB/s from hard drive to USB, and about 8MB/s copying between flash drives.
I've also experienced very slow USB transfers, with CPU waiters piling up. The odd thing is that USB-to-USB transfers go at about four times the speed of HDD-to-USB transfers. On average I get 2MB/s from hard drive to USB, and about 8MB/s copying between flash drives.