I'm running NSLU2 with a Maxtor OneTouch 200GB. Like many others, if I tried to transfer a very large (i.e., >2GB) file or many files at once (e.g., total of 20GB), the transfer would inevitably fail after a minute or so. I tried many suggestions that I found here and elsewhere, including flashing Unslug to my NSLU2. But to no avail. But on a whim, I tried moving my HD from the Disk 1 port to the Disk 2 port. Voila! I haven't been able to reproduce the problem since.