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On Thu, 31 Jan 2002, Eschmann, Michael K wrote: > This message is from the T13 list server. > > > But Andre, > > the devices are mostly MW2 or slower, so don't put the issue on UDMA. UDMA > has a fairly clear spec, where MW/SW operation gets screwed up by too many > people since documentation is few-and-far-between. > > I've also seen CD-R,RW fail running PIO because of drive starvation, so > don't think issues are DMA-only! > > Regards, MKE. Hi Mike, There is difference between "drive starvation" and deadlock bus-hangs. The point I failed to make is given that arbitrary cdr-rw engine design/firmware, many of these come in w/ Ultra Mode 1 and just jam the works. The best example was a Yamaha/HP/Ricoh core which choked dead. You could dead-lock those on reading only and the host goes totally south because the devices go further south. I never wasted the time to include them, because they were off the market so fast you could hardly blink. Cheers, Andre Subscribe/Unsubscribe instructions can be found at www.t13.org.
