Many thanks to Jools, you are a hero. On my machine a cable change seems to have cured it. I drew a diagram of my setup below. This worked 2 or 3 years without a problem until the fatal kernel upgrade. The devices and cables are rarely being touched or moved, which is why I unfortunately neglected to check for cabling issues right away.
Laptop USB ------<5m cable>----- Cheapo active USB extension -----<1m cable>----- USB Hub -----<4x1m cable>----- 4 USB disks Laptop USB ----- Logitech wireless mouse The 1m cable between USB extension and hub had the damage-prone Mini-B plug (5-pin), and so it was the first I replaced on a hunch. Since then I have performed copy tests and the error did not yet reappear after > 200 GB, an amount of data that would usually have triggered it. Have the other subscribers to this bug checked their cables? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/349767 Title: external USB hard drive disconnects -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
