On Wed, Jul 14, 2004 at 03:06:25PM +0200, Jean-Sebastien Roy wrote: > > >Once I had an old noname PC (iP200 in an i430VX motherboard), and > >I installed a DVD+RW drive into it. Data read from a CD or DVD was > >damaged with high probability. With hw.ata.atapi_dma set to zero, > >the probability of data corruption was lower, but still noticable. > >That's while there were no corruption on burning in DMA or PIO mode. > > > At least I'm not alone !
Of course you are not! A lot of ATA users are in the same boat. I myself managed to get out of it only thanks to VIA ;-) Now I have a VIA KT133-based motherboard, which seems to have no trouble with DMA on ATAPI. Alas, it doesn't mean that other VIA chipsets have bug-free ATAPI support. Moreover, it won't guarantee that another instance of the same chipset would give you no trouble. > >Are there CDs in your collection that produce no errors? > > > Yes, but I cannot really tell if it's by chance or they really do not > produce errors. That's a point to test in order to be completely sure. Just pick such a "error-free" CD, read it *really many* a time, and compare the checksums. > The CDs read well in other computers. FWIW, my ATA controler is an Intel > ICH5 : [skip] > I think I will live with this bug until I change hardware. In any case, testing the effect of disabling atapi_dma in your system would be interesting. -- Yar _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
