From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.9) Gecko/20020314 Description of problem: I have a Hitachi DVD-ROM that works flawlessly under RedHat 7.2. In Skipjack I am constatly getting read errors from the drive. Here are the settings on the drive (set by system): /sbin/hdparm -I /dev/hdc /dev/hdc: ATAPI CD-ROM, with removable media Model Number: HITACHI DVD-ROM GD-7500 Serial Number: Firmware Revision: 0005 Standards: Configuration: DRQ response: 50us. Packet size: 12 bytes Capabilities: LBA, IORDY(can be disabled) DMA: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 *udma2 Cycle time: min=120ns recommended=120ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=120ns IORDY flow control=120ns /sbin/hdparm -v /dev/hdc /dev/hdc: HDIO_GET_MULTCOUNT failed: Invalid argument I/O support = 1 (32-bit) unmaskirq = 1 (on) using_dma = 0 (off) keepsettings = 0 (off) HDIO_GET_NOWERR failed: Invalid argument readonly = 1 (on) readahead = 8 (on) HDIO_GETGEO failed: Invalid argument busstate = 1 (on) And the errors I am recieving look like this: Mar 30 10:49:18 bud kernel: hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } Mar 30 10:49:18 bud kernel: hdc: cdrom_decode_status: error=0x34 Mar 30 10:49:19 bud kernel: hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } If I turn scsi-ide support they look like this: Mar 30 02:59:15 bud kernel: Info fld=0x39272, Current sd0b:00: sense key Medium Error Mar 30 02:59:15 bud kernel: Additional sense indicates Unrecovered read error Mar 30 02:59:15 bud kernel: I/O error: dev 0b:00, sector 936392 Mar 30 02:59:16 bud kernel: scsi0: ERROR on channel 0, id 0, lun 0, CDB: Request Sense 00 00 00 40 00 I also couldn't install Skipjack from this DVDrom (my CDRW worked though). Installation failed attempting to load kernel. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Mount a media in DVDrom 2. Start copy from DVDrom to the disk 3. Watch errors. Additional info:
I have tried a different DVDrom otherwise working with the same results: hdparm -I /dev/hdc /dev/hdc: ATAPI CD-ROM, with removable media Model Number: DVD-ROM BDV212B Serial Number: MT1318 Firmware Firmware Revision: VER 0.36 Standards: Used: ATAPI for CD-ROMs, SFF-8020i, r2.5 Supported: CD-ROM ATAPI-2 Configuration: DRQ response: 50us. Packet size: 12 bytes Capabilities: LBA, IORDY(cannot be disabled) DMA: mdma0 mdma1 *mdma2 udma0 udma1 udma2 Cycle time: min=120ns recommended=150ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=227ns IORDY flow control=120ns Mar 31 09:01:30 bud kernel: hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } Mar 31 09:01:30 bud kernel: hdc: cdrom_decode_status: error=0x40 Mar 31 09:02:34 bud kernel: hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } Mar 31 09:02:34 bud kernel: hdc: cdrom_decode_status: error=0x40 Mar 31 09:02:39 bud kernel: hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } Mar 31 09:02:39 bud kernel: hdc: cdrom_decode_status: error=0x40 Mar 31 09:02:45 bud kernel: hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } Mar 31 09:02:45 bud kernel: hdc: cdrom_decode_status: error=0x40 Mar 31 09:02:50 bud kernel: hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } Mar 31 09:02:50 bud kernel: hdc: cdrom_decode_status: error=0x40 Mar 31 09:02:50 bud kernel: hdc: ATAPI reset complete Now it looks like a VIA266A support problem for DVDrom devices. I run this on Epox 8KHA+ motherboard: 00:00.0 Host bridge: VIA Technologies, Inc. VT8367 [KT266] 00:01.0 PCI bridge: VIA Technologies, Inc. VT8367 [KT266 AGP] 00:11.0 ISA bridge: VIA Technologies, Inc. VT8233 PCI to ISA Bridge 00:11.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 06) 00:11.2 USB Controller: VIA Technologies, Inc. UHCI USB (rev 1b) 00:11.3 USB Controller: VIA Technologies, Inc. UHCI USB (rev 1b) 00:11.4 USB Controller: VIA Technologies, Inc. UHCI USB (rev 1b) In BIOS it has a "Disable UDMA on CDROMs" setting which for some reson gets ignored by the kernel. Disabling UDMA on DVDrom channel doesn't help.
Do you have any of the following running: 1) smartd 2) autorun 3) magicdev ?
smartd, autorun or magicdev are not running. I found this thread on LKML: http://groups.google.com/groups?hl=en&threadm=linux.kernel.3C336A6C.493BFD27%40i.am&rnum=16&prev=/groups%3Fq%3Dcdrom_decode_status:%2Bstatus%253D0x51%26start%3D10%26hl%3Den%26selm%3Dlinux.kernel.3C336A6C.493BFD27%2540i.am%26rnum%3D16 I also have CDRW on that computer working fine with the same CDs that give errors on DVDroms. /dev/hdd: Model=20X10, FwRev=H.BK, SerialNo= Config={ Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic } RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0 BuffType=DualPortCache, BuffSize=1024kB, MaxMultSect=0 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 *mdma2 AdvancedPM=no
Unrecovered read error is a message from the device itself saying "Sorry I couldn't read the disk". DVD drives having trouble reading CD-R and CD-RW media is not uncommon and apparently relates to the laser wavelength used The BIOS DMA disable is ignored because its not something we can access sanely and its really there for DOS and old old windows only. Linux has its own IDE DMA control - in fact you can do hdparm -d0 /dev/hdc and try the disk with it off (0) and on (1) if you want to see hwo it behaves
I had a chance to play with IDE settings for DVD drive today with some very interesting results. Right after boot there are no DMA settings on the drive: hdparm -i /dev/hdc /dev/hdc: Model=HITACHI DVD-ROM GD-7500, FwRev=0005, 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=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 udma2 AdvancedPM=no I don't understand what absence of mode stetting means. hdparm -I shows UDMA2 mode in use hdparm -I /dev/hdc /dev/hdc: ATAPI CD-ROM, with removable media Model Number: HITACHI DVD-ROM GD-7500 Serial Number: Firmware Revision: 0005 Standards: Configuration: DRQ response: 50us. Packet size: 12 bytes Capabilities: LBA, IORDY(can be disabled) DMA: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 *udma2 Cycle time: min=120ns recommended=120ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=120ns IORDY flow control=120ns DMA cannot be set on the drive: hdparm -d1 /dev/hdc /dev/hdc: setting using_dma to 1 (on) HDIO_SET_DMA failed: Operation not permitted using_dma = 0 (off) Setting transfer mode -X33 actually works, but actually sets multiword 1 hdparm -X33 /dev/hdc /dev/hdc: setting xfermode to 33 (multiword DMA mode1) hdparm -i /dev/hdc /dev/hdc: Model=HITACHI DVD-ROM GD-7500, FwRev=0005, 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=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: sdma0 sdma1 sdma2 mdma0 *mdma1 mdma2 udma0 udma1 udma2 AdvancedPM=no Attempt to copy from DVD drive to the disk results in 100% CPU usage: 8:03pm up 22 min, 2 users, load average: 1.11, 0.33, 0.11 63 processes: 61 sleeping, 2 running, 0 zombie, 0 stopped CPU states: 0.5% user, 91.5% system, 0.0% nice, 7.9% idle Mem: 514796K av, 506488K used, 8308K free, 0K shrd, 12512K buff Swap: 530104K av, 0K used, 530104K free 432768K cached PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND 1516 root 15 0 564 564 464 R 9.2 0.1 0:03 cp But no errors observed! Setting transfer mode to -X66 also works: hdparm -X66 /dev/hdc /dev/hdc: setting xfermode to 66 (UltraDMA mode2) Now hdparm -i also shows UDMA mode2 hdparm -i /dev/hdc /dev/hdc: Model=HITACHI DVD-ROM GD-7500, FwRev=0005, 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=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 *udma2 AdvancedPM=no But hdparm -v still does not indicate that DMA is used! hdparm -v /dev/hdc /dev/hdc: HDIO_GET_MULTCOUNT failed: Invalid argument I/O support = 1 (32-bit) unmaskirq = 1 (on) using_dma = 0 (off) keepsettings = 0 (off) HDIO_GET_NOWERR failed: Invalid argument readonly = 1 (on) readahead = 8 (on) HDIO_GETGEO failed: Invalid argument busstate = 1 (on) Copying content from DVD drive still results in 70%-100% cpu usage: 8:10pm up 28 min, 2 users, load average: 0.53, 0.36, 0.21 64 processes: 61 sleeping, 3 running, 0 zombie, 0 stopped CPU states: 0.5% user, 69.9% system, 0.0% nice, 29.4% idle Mem: 514796K av, 411364K used, 103432K free, 0K shrd, 13724K buff Swap: 530104K av, 0K used, 530104K free 341864K cached PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND 1564 root 16 0 564 564 464 R 3.7 0.1 0:01 cp No kernel error though. Something doesn't look about all this...
Pardon my spelling :)
Thanks for the bug report. However, Red Hat no longer maintains this version of the product. Please upgrade to the latest version and open a new bug if the problem persists. The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, and if you believe this bug is interesting to them, please report the problem in the bug tracker at: http://bugzilla.fedora.us/