No you misunderstand. There are two species of problem
1. 3 of 4 drives from two vendors that don't do UDMA right and
corrupt stuff
2. An undefined number of unpredictable circumstances where UDMA
CRC will avoid other corruption caused by poor hardware/cabling
So you only want to disable UDMA for #1. Disabling it globally by default
will harm other people, and not to a predictible pattern. Hence the current
solution is far from optimal
Alan
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