Public bug reported: I am at a loss to diagnose what causes this. Faulty hardware, faulty kernel, faulty compact disc (except that I _think_ the drive was empty after I had removed the disc)?
I am using Ubuntu Breezy. Today I noticed that my root partition was full, even though it was supposed to have 1 GB free. I suspected some error messages were flooding the log. I had been using Konqueror to convert music from music CD's (of various make and age) with two of my drives. What I found in three logfiles (syslog, kern.log, messages), was these four messages: Oct 7 14:23:54 mymachine kernel: [4303409.960000] cdrom: dropping to old style cdda (sense=4) Oct 7 14:23:54 mymachine kernel: [4303409.960000] hdd: packet command error: status=0x51 { DriveReady SeekComplete Error } Oct 7 14:23:54 mymachine kernel: [4303409.960000] hdd: packet command error: error=0x54 { AbortedCommand LastFailedSense=0x05 } Oct 7 14:23:54 mymachine kernel: [4303409.960000] ide: failed opcode was: unknown ...and the last three of these messages kept repeating indefinitely, until the three files were all above 350 MB, totaling about 1 GB. This had been going on for 20 minutes, i.e. until the root partition filled. The drive either fails to read a disc, or fails to identify that the drive is empty. Sometimes it also fails to eject nicely, having to use "sudo" to eject, but I don't know if this is connected. I had used "sudo eject /dev/hdd" on this drive twice. The first time it didn't eject, just opened and closed the tray. The second time it ejected. This _seems to_ possibly have triggered the errors. hdparm -i (after the incident) shows this: /dev/hdd: Model=DVD-ROM DDU1621, FwRev=VER S2.9, SerialNo= Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic } RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0 BuffType=unknown, BuffSize=0kB, MaxMultSect=0 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0 IORDY=yes, tPIO={min:227,w/IORDY:120}, tDMA={min:120,rec:150} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 udma2 AdvancedPM=no * signifies the current active mode hdparm (after the incident) shows this: /dev/hdd: IO_support = 0 (default 16-bit) unmaskirq = 0 (off) using_dma = 0 (off) keepsettings = 0 (off) readonly = 0 (off) readahead = 256 (on) HDIO_GETGEO failed: Invalid argument If I remember, I'll check this after a clean boot, and see if it's different. (I believe it is, it should be using dma.) ** Affects: Ubuntu Importance: Undecided Status: Unconfirmed -- System logs fill with cdrom errors (1 GB per 20 minutes) https://launchpad.net/bugs/64548 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs