On Fri, 29 Feb 2008 22:59:11 +0100 Gerold Jury wrote: > The oldest kernel that i tried is now 2.6.18 and behaves the same as all the > others up to 2.6.24.2. > I did the tests on 2.6.18 in runlevel 1 with only udevd running to make sure > no other program is sending any commands to the drive. > > I am suspicious about the LG hardware as well so i hooked it to the friendly > windows pc in the neighborhood but it works quite well there. > > The SATA port the LG drive is connected to, was previously occupied by a > maxtor harddrive and did it's work without troubles. > > Does anybody know a possible meaning of the byte sequence > 2a 00 00 00 00 80 00 00 40 00 00 00 00 80 00 00 > in the context of scsi dvd writing 0x2a is the SCSI WRITE(10) command; the following 10 bytes look like its arguments (bytes 2-5 - logical block address, bytes 7-8 - transfer length in blocks); last 4 bytes seem to be another copy of the logical block address. > >> A simple test with a DVD RAM and dd instead of growisofs > >> > >> dd if=/dev/zero of=/dev/srX bs=1024k count=10 > >> > >> and a readback afterwards > >> > >> dd if=/dev/srX of=imageX.bin bs=1024k count=10 > >> > >> gives me an all zero file from the IDE drive but a file > >> full of probably scsi commands for the SATA drive Does this happen only with DVD-RAM? Could you try with a DVD+RW disk (these disks could also be written to with a simple "dd" after initial formatting)? > 00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > * > 00020000 2a 00 00 00 00 40 00 00 40 00 00 00 00 40 00 00 |*....@..@....@..| > 00020010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > * > 00040000 2a 00 00 00 00 80 00 00 40 00 00 00 00 80 00 00 |*.......@.......| > 00040010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > * > 00060000 2a 00 00 00 00 c0 00 00 02 00 00 00 00 c0 00 00 |*...............| > 00060010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > * > 00061010 00 00 00 00 00 00 00 00 2a 00 00 00 00 c2 00 00 |........*.......| > 00061020 40 00 00 00 00 c2 00 00 00 00 00 00 00 00 00 00 |@...............| > 00061030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > * > 00081010 00 00 00 00 00 00 00 00 2a 00 00 00 01 02 00 00 |........*.......| > 00081020 40 00 00 00 01 02 00 00 00 00 00 00 00 00 00 00 |@...............| > 00081030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > * > 000a1010 00 00 00 00 00 00 00 00 2a 00 00 00 01 42 00 00 |........*....B..| > 000a1020 40 00 00 00 01 42 00 00 00 00 00 00 00 00 00 00 |@....B..........| > 000a1030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > * > 000c1010 00 00 00 00 00 00 00 00 2a 00 00 00 01 82 00 00 |........*.......| > 000c1020 40 00 00 00 01 82 00 00 00 00 00 00 00 00 00 00 |@...............| > 000c1030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| Definitely looks like SCSI WRITE(10) commands, and the LBA field corresponds to the location of the broken data (assuming 2KB block size). > >> uname -a > >> Linux blaubaer 2.6.24.2 #4 Sun Feb 24 21:50:21 CET 2008 x86_64 AMD > >> Athlon(tm) 64 Processor 3400+ AuthenticAMD GNU/Linux > >> > >> lspvi -v > >> > >> 00:0f.0 RAID bus controller: VIA Technologies, Inc. VIA VT6420 SATA RAID > >> Controller (rev 80) > >> Subsystem: ASUSTeK Computer Inc. A7V600/K8V Deluxe/K8V-X/A8V > >> Deluxe motherboard > >> Flags: bus master, medium devsel, latency 64, IRQ 20 > >> I/O ports at e800 [size=8] > >> I/O ports at e400 [size=4] > >> I/O ports at e000 [size=8] > >> I/O ports at d800 [size=4] > >> I/O ports at d400 [size=16] > >> I/O ports at d000 [size=256] > >> Capabilities: [c0] Power Management version 2 > >> Kernel driver in use: sata_via > >> > >> 00:0f.1 IDE interface: VIA Technologies, Inc. > >> VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06) (prog-if > >> 8a [Master SecP PriP]) > >> Subsystem: ASUSTeK Computer Inc. A7V600/K8V-X/A8V Deluxe > >> motherboard Flags: bus master, medium devsel, latency 32, IRQ 20 > >> [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8] > >> [virtual] Memory at 000003f0 (type 3, non-prefetchable) [size=1] > >> [virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8] > >> [virtual] Memory at 00000370 (type 3, non-prefetchable) [size=1] > >> I/O ports at fc00 [size=16] > >> Capabilities: [c0] Power Management version 2 > >> Kernel driver in use: pata_via > >> > >> cat /var/log/messages > >> > >> Feb 25 18:20:57 blaubaer sata_via 0000:00:0f.0: version 2.3 > >> Feb 25 18:20:57 blaubaer ACPI: PCI Interrupt 0000:00:0f.0[B] -> GSI 20 > >> (level, low) -> IRQ 20 > >> Feb 25 18:20:57 blaubaer sata_via 0000:00:0f.0: routed to hard irq line 10 > >> Feb 25 18:20:57 blaubaer scsi3 : sata_via > >> Feb 25 18:20:57 blaubaer scsi4 : sata_via > >> Feb 25 18:20:57 blaubaer ata4: SATA max UDMA/133 cmd 0xe800 ctl 0xe400 > >> bmdma 0xd400 irq 20 > >> Feb 25 18:20:57 blaubaer ata5: SATA max UDMA/133 cmd 0xe000 ctl 0xd800 > >> bmdma 0xd408 irq 20 > >> Feb 25 18:20:57 blaubaer ata4: SATA link down 1.5 Gbps (SStatus 0 SControl > >> 300) > >> Feb 25 18:20:57 blaubaer ata5: SATA link up 1.5 Gbps (SStatus 113 SControl > >> 300) > >> Feb 25 18:20:57 blaubaer ata5.00: ATAPI: HL-DT-ST DVDRAM GH20NS10, EL00, > >> max UDMA/100 > >> Feb 25 18:20:57 blaubaer ata5.00: configured for UDMA/100 > >> Feb 25 18:20:57 blaubaer scsi 4:0:0:0: CD-ROM HL-DT-ST DVDRAM > >> GH20NS10 EL00 PQ: 0 ANSI: 5 > >> Feb 25 18:20:57 blaubaer sr0: scsi3-mmc drive: 48x/48x writer dvd-ram > >> cd/rw xa/form2 cdda tray > >> Feb 25 18:20:57 blaubaer Uniform CD-ROM driver Revision: 3.20 > >> Feb 25 18:20:57 blaubaer sr 4:0:0:0: Attached scsi CD-ROM sr0 > >> Feb 25 18:20:57 blaubaer sr 4:0:0:0: Attached scsi generic sg2 type 5 > >> Feb 25 18:20:57 blaubaer pata_via 0000:00:0f.1: version 0.3.3 > >> Feb 25 18:20:57 blaubaer ACPI: PCI Interrupt 0000:00:0f.1[A] -> GSI 20 > >> (level, low) -> IRQ 20 > >> Feb 25 18:20:57 blaubaer scsi5 : pata_via > >> Feb 25 18:20:57 blaubaer scsi6 : pata_via > >> Feb 25 18:20:57 blaubaer ata6: PATA max UDMA/133 cmd 0x1f0 ctl 0x3f6 bmdma > >> 0xfc00 irq 14 > >> Feb 25 18:20:57 blaubaer ata7: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma > >> 0xfc08 irq 15 > >> Feb 25 18:20:57 blaubaer ata6.00: ATAPI: PHILIPS SPD2411P, BP01, max > >> UDMA/66 Feb 25 18:20:57 blaubaer ata6.00: limited to UDMA/33 due to > >> 40-wire cable Feb 25 18:20:57 blaubaer ata6.00: configured for UDMA/33 > >> Feb 25 18:20:57 blaubaer scsi 5:0:0:0: CD-ROM PHILIPS SPD2411P > >> BP01 PQ: 0 ANSI: 5 > >> Feb 25 18:20:57 blaubaer sr1: scsi3-mmc drive: 48x/48x writer dvd-ram > >> cd/rw xa/form2 cdda tray > >> Feb 25 18:20:57 blaubaer sr 5:0:0:0: Attached scsi CD-ROM sr1 > >> Feb 25 18:20:57 blaubaer sr 5:0:0:0: Attached scsi generic sg3 type 5
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