http://bugzilla.kernel.org/show_bug.cgi?id=13882 Summary: Cannot read CD: "Logical unit communication CRC error" Product: IO/Storage Version: 2.5 Kernel Version: 2.6.27.10 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: IDE AssignedTo: io_ide@xxxxxxxxxxxxxxxxxxxx ReportedBy: python.dev.9@xxxxxxxxx Regression: Yes I have an official Ubuntu 9.04 (Jaunty) CD ordered using the Ubuntu ShipIt service. I put the disc in my DVD drive and attempt to validate the contents of the CD using the following command: md5sum -c md5sum.txt | grep -vi 'OK$' This returns the following error message in the terminal: md5sum: ./casper/filesystem.squashfs: Input/output error ./casper/filesystem.squashfs: FAILED open or read md5sum: WARNING: 1 of 65 listed files could not be read Opening /var/log/messages in a text editor shows the following: Jul 30 18:12:23 phoenix kernel: [ 724.994491] UDF-fs: No VRS found Jul 30 18:12:23 phoenix kernel: [ 724.994500] UDF-fs: No partition found (1) Jul 30 18:13:12 phoenix kernel: [ 773.810949] sr 1:0:1:0: [sr0] Unhandled sense code Jul 30 18:13:12 phoenix kernel: [ 773.810958] sr 1:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jul 30 18:13:12 phoenix kernel: [ 773.810964] sr 1:0:1:0: [sr0] Sense Key : Hardware Error [current] Jul 30 18:13:12 phoenix kernel: [ 773.810971] sr 1:0:1:0: [sr0] Add. Sense: Logical unit communication CRC error (Ultra-DMA/32) The earliest kernel I have found that reproduces this bug is 2.6.27.10. The latest kernel I have found that works as expected is 2.6.24.6. This bug is reproducible using the latest stable kernel (2.6.30.3). All these tests were conducted on a Ubuntu 8.10 (Intrepid) system, and all kernel versions specified are mainline kernels (not Ubuntu distributed kernels) installed using the instructions at https://wiki.ubuntu.com/KernelTeam/MainlineBuilds. The DVD drive used is a Lite-On 201AH DVDRW, firmware revision LL0D. This is an IDE drive. -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
