Adding to comments #50 and #51: My machine is a MacBook Pro 5.4. lspci gives me the following USB controller info:
00:04.0 USB Controller: nVidia Corporation MCP79 OHCI USB 1.1 Controller (rev b1) 00:04.1 USB Controller: nVidia Corporation MCP79 EHCI USB 2.0 Controller (rev b1) 00:06.0 USB Controller: nVidia Corporation MCP79 OHCI USB 1.1 Controller (rev b1) 00:06.1 USB Controller: nVidia Corporation MCP79 EHCI USB 2.0 Controller (rev b1) I did not experience this issue on Karmic (and I did already back then perform these large copies for backup), which fits with the info in comment #51 that the 2.6.31 kernel does not exhibit the issue. It appeared for me during the Lucid development cycle, then went away again after some kernel update still before release. Since then I have unfortunately not performed copy operations with such large amounts of data (and usually it works even today when copying smaller amounts), so I cannot say for sure when it reappeared (or indeed whether the experienced initial disappearance in Lucid was a fluke and the bug just never got triggered by chance). Different to what Albert in #51 sees, I have experienced the problem with tow oldish 300 GB disks and a 1 TB disk, but have yet to see it with my brand new 2 TB one. I get the impression that I can trigger it more easily when using rsync via the BackInTime backup tool than when using cp or Nautilus. However, that may be by chance, and I certainly *have* triggered it with cp and Nautilus, too. -- external USB hard drive disconnects https://bugs.launchpad.net/bugs/349767 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
