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SubjectRe: x86_64 SATA DVD drive + libata trouble
Bernd Strieder wrote:
> Hello,
> please CC me, I'm not subscribed.
> If any kernel developer is interested in more specific information
> please mail me, I can build kernels, I can apply patches, though
> have not done it regularly.
> I'd like to get the DVD drive working somehow. I have googled a lot
> and did not find any more ideas what to do. Some good keywords to
> find a solution would suffice at that end.
> Rough problem description:
> I have a Tyan mainboard with NVIDIA chipset CK804. The only
> SATA/IDE device is a SATA DVD combo, the harddisks are on a RAID
> controller from 3ware. The harddisks are fine.
> The openSuSE 10.3 boot dvds fail after booting from the BIOS, the
> installation kernel cannot use the DVD drive. That kernel uses
> libata and sata_nv pata_amd as drivers. The drive is recognized
> but it cannot be used. This is the situation probably during
> install from DVD and now in the running system after a network
> install it persists.
> Reading from the dvd device /dev/sr0 with dd stops after at most
> 119kb of rubbish read. Mounting fails with superblock not found.
> When trying to remove the pata_amd module I get an Oops. I tried to
> remove the modules to have a chance to reload them with other
> options (atapi_enable), but that did not help, even after
> rebooting.
> A vanilla kernel behaves even less friendly, the dd
> on /dev/sr0 causes a hard reset.
> So there are clearly some problems with libata in this system.
> I have failed switching away from libata getting the drive to be
> recognized at all.

There is a known problem with ATAPI devices on CK804 chipsets which have
memory above the 4GB mark, being debugged here:

If you are running into that one you can workaround it for now by
passing the adma=0 parameter to the sata_nv module (not sure how this
would be done on Suse's setup) or pass sata_nv.adma=0 on the kernel
command line if sata_nv is built into the kernel. If that does help, I
could ask you to test patches :-)

Robert Hancock Saskatoon, SK, Canada
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