Like some, I struggled with moving large amounts of data on or off the drive I have connected to my NSLU2. Moving a large file (> 1GB) or a large number of files at once would result in NSLU2 losing its ability to use the disk. The NSLU2 web interface would show the disk was no longer present. Only by resetting the power on the disk and the NSLU2 could I restore access to the disk. I tried a variety of suggestions I found here, implemented some TCP/IP tweaks and found some improvement. Problem became even less frequent when I moved the disk to USB port 2 on the NSLU2. However, from time to time the disk would still "disappear" on me. Even during periods where disk activity was light or non-existent. This would happen at least twice a day. And the only method I found that would recover functionality was to remove and reinsert the power cable on the NSLU2; the NSLU2 would not shut down after I pressed the power button. My NSLU2 sits on a shelf a couple of feet from the one disk attached to it. For whatever reason, I had always left the NSLU2 lying on its side. The other day I stood it up in its little stand. I haven't any problems with it since. This is the longest period of hassle-free operation I've experienced with the NSLU2.