That message just means that no device is connected to your secondary IDE chain. Nothing in the kern.log shows any problems with the drive.
If you experience issues with nautilus, please file a bug on that. Thanks ** Changed in: linux-source-2.6.20 (Ubuntu) Status: Unconfirmed => Rejected -- ata2: reset failed, giving up https://launchpad.net/bugs/93965 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs