All the 12.04 on R720 is newly installed, less than a month. As you suggest us upgrading the kernel, it is not so well for putting into practise, because they all for production. All the above error log appear with no regular, sometime appear across the whoile the screen and sometimes just nothing.
** Tags added: kernel-unable-to-test-upstream -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1095228 Title: 12.04 on dell R720, disk failed with large "sd xxxx: rejecting I/O to offline device" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1095228/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs