Hi,

On Thursday, July 18, 2013 08:25:41 PM Andreas Mohr wrote:

Hi,

forgot to mention that I had already added a libata.force=40c boot
after my 80c config issue discovery
which did successfully cause the "limiting to UDMA/33 due to 40c foo" dmesg
yet where there's now initial but strong confirmation via reports
that the resulting UDMA/33 limit did NOT manage to fix corruption issues,
thus it's more strongly likely that the "bound to ill-suited pata_amd driver"
(due to incorrectly configuring speeds, or due to not configuring speeds
at all due to possibly BIOS not providing emulation of PCI register accesses
to Geode bus, which would be properly supported by pata_cs5536 OTOH)
thing is the actual reason and might fix it (fingers crossed).

UDMA/66 (and higher) requires 80-wire cable to work (if the vendor states
that UDMA/66 is supported then UDMA/100 should also work on CS5536). UDMA/33
should work just fine with 40-wire cable. Therefore this indeed sounds more
like wrong driver being selected issue than a cable problem.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics