Messages in this thread | | | Date | Mon, 10 Aug 1998 20:08:59 -0400 | From | Mark Lord <> | Subject | Re: IDE-Driver Disk Accounting Missing, Maybe SCSI too...... |
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Theodore Y. Ts'o wrote: > > The strategy of using blacklists work as long as the number of bogus > hardware devices is small, and well-defined. If it's random (i.e., > depends on the cable length, or what hardware integrator put together > the machine, etc.), then sometimes the only thing we can do is disable > the performance hacks by default, and make the user manually turn on the > performance enhancements. (And make sure that switches, and warnings, > are well documented.)
I must agree with this. My experience over the past 6 years or so is that the few IDE failures seen have all been random in nature.
That's why I just added a config option to not-enable-DMA rather than attempting to maintain a blacklist.
The flaw in this is that UDMA should always be used regardless, as it ought to be more reliable than DMA or PIO due to the 16-bit CRC.
But no big deal. Things are working fine as is, I think. -- mlord@pobox.com
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