When booting true image 7 (build 627) I keep getting sector read errors from my external USB 2.0 disk. I can simply select retry each time, and the retry succeeds, so I can restore the image. But having to sit next to the computer hitting alt-r every 1-2 minutes is quite cumbersome. I have done a physical check on the disk, it contains no errors. I haven tried the latest build (634) yet since according to the change log nothing significant has changed. I can't remember this behaviour earlier, but I think I was only using internal IDE disks at the time.