A bug as been reported me to where some DVD-RW drives are unable to detect blank DVDs. Apparently this is a regression issue, as the reporting user is insisting that they used to be able to burn DVDs using the same hardware. The reporting user provided this dmesg output. I believe they tried a few different disks to gain this response. I am pasting dmesg output from these attempts: [ 3563.989601] sr 5:0:1:0: [sr0] Unhandled sense code [ 3563.989606] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 3563.989609] sr 5:0:1:0: [sr0] Sense Key : Medium Error [current] [ 3563.989614] sr 5:0:1:0: [sr0] ASC=0x10 <<vendor>> ASCQ=0x90 [ 3563.989621] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 05 6f 60 00 00 02 00 [ 3563.989629] end_request: I/O error, dev sr0, sector 1424768 [ 3563.989633] quiet_error: 3 callbacks suppressed [ 3563.989636] Buffer I/O error on device sr0, logical block 178096 [ 3607.084661] sr 5:0:1:0: [sr0] Device not ready [ 3607.084665] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 3607.084669] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current] [ 3607.084673] sr 5:0:1:0: [sr0] Add. Sense: Medium not present [ 3607.084677] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00 [ 3607.084685] end_request: I/O error, dev sr0, sector 120 [ 3607.084690] Buffer I/O error on device sr0, logical block 15 [ 3607.090021] sr 5:0:1:0: [sr0] Device not ready [ 3607.090023] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 3607.090026] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current] [ 3607.090029] sr 5:0:1:0: [sr0] Add. Sense: Medium not present [ 3607.090032] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00 [ 3607.090039] end_request: I/O error, dev sr0, sector 120 [ 3607.090042] Buffer I/O error on device sr0, logical block 15 [ 3607.095382] sr 5:0:1:0: [sr0] Device not ready [ 3607.095384] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 3607.095387] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current] [ 3607.095390] sr 5:0:1:0: [sr0] Add. Sense: Medium not present [ 3607.095393] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00 [ 3607.095400] end_request: I/O error, dev sr0, sector 120 [ 3607.095403] Buffer I/O error on device sr0, logical block 15 [ 3607.099609] sr 5:0:1:0: [sr0] Device not ready [ 3607.099613] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 3607.099617] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current] [ 3607.099620] sr 5:0:1:0: [sr0] Add. Sense: Medium not present [ 3607.099624] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00 [ 3607.099632] end_request: I/O error, dev sr0, sector 120 [ 3607.099636] Buffer I/O error on device sr0, logical block 15 [ 3607.104870] sr 5:0:1:0: [sr0] Device not ready [ 3607.104872] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 3607.104875] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current] [ 3607.104878] sr 5:0:1:0: [sr0] Add. Sense: Medium not present [ 3607.104882] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00 [ 3607.104889] end_request: I/O error, dev sr0, sector 120 [ 3607.104892] Buffer I/O error on device sr0, logical block 15 [ 3607.111000] sr 5:0:1:0: [sr0] Device not ready [ 3607.111006] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 3607.111010] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current] [ 3607.111014] sr 5:0:1:0: [sr0] Add. Sense: Medium not present [ 3607.111021] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00 [ 3607.111028] end_request: I/O error, dev sr0, sector 120 [ 3607.111033] Buffer I/O error on device sr0, logical block 15 [ 3607.116389] sr 5:0:1:0: [sr0] Device not ready [ 3607.116391] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 3607.116394] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current] [ 3607.116398] sr 5:0:1:0: [sr0] Add. Sense: Medium not present [ 3607.116401] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00 [ 3607.116408] end_request: I/O error, dev sr0, sector 120 [ 3607.116410] Buffer I/O error on device sr0, logical block 15 [ 3635.494275] sr 5:0:1:0: [sr0] Unhandled sense code [ 3635.494279] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 3635.494283] sr 5:0:1:0: [sr0] Sense Key : Medium Error [current] [ 3635.494287] sr 5:0:1:0: [sr0] ASC=0x10 <<vendor>> ASCQ=0x90 [ 3635.494293] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 05 6f 60 00 00 02 00 [ 3635.494301] end_request: I/O error, dev sr0, sector 1424768 [ 3635.494307] Buffer I/O error on device sr0, logical block 178096 [ 3647.817487] ISO 9660 Extensions: Microsoft Joliet Level 3 [ 3648.020437] ISO 9660 Extensions: RRIP_1991A [ 3791.322659] cdrom: This disc doesn't have any tracks I recognize! The same user later reported the following log messages: [ 3912.648032] Clocksource tsc unstable (delta = -231260494 ns) [ 4306.359731] cdrom: This disc doesn't have any tracks I recognize! Two of the users were kind enough to provide qpxtool print screens: http://launchpadlibrarian.net/54734405/qpxtool-drive.jpg http://launchpadlibrarian.net/54788615/qpxtool-screenshot.png Any help, or pointers in the right direction would be appreciated. Kind regards, Lee -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
