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SubjectRe: Data corruption reading IDE CD-ROM in 2.2.x
JA>> The Red Hat supplied kernel doesn't utilize DMA per default, AFAIK.
JA>> It looks as if you are using DMA with 2.2.14, and that is probably
JA>> what makes the difference. Have you tried switching DMA on or off?
JA>> Did that change anything?

Yes, switching DMA off for HD (which was hda, CD being hdb) seems to cure
the problem. Thanks a lot. Does this mean I couldn't use DMA at all with
my chipset, or if I move CD on the second IDE it will be OK?

And, certainly, I still wonder why it silently corrupted the data... Do I
have bad hardware or something weird in the kernel?
--
Stanislav Malyshev stas@zend.com
+972-3-6139665


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