extra bytes written to SATA DVD drive on kernel 2.6.23 till 2.6.24.2

[Gerold Jury <gml@inode.at>]

Hello,

I have two DVD drives, one connected to the SATA port (LG) the other to the 
IDE port (PHILIPS) of a via chipset.
They are driven by VIA SATA support (SATA_VIA) and VIA PATA support 
(PATA_VIA).

When I write an iso image to the drive on the SATA port /dev/sr0 it has some 
extra bytes on disk which make the disk unreadable.
Writing to the IDE drive /dev/sr1 works well.

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 and looks like

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  |................|

I really need some hints to make the SATA drive usable, please.

best Regards
Gerold


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