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Re: mpt Serious performance issues

Hi all,

some new findings on this issue:

-The OpenBSD driver for this chip is called mpi and performs better
(Write speed ~35MB/s, Read speed ~70 MB/s).

-Speking of write caching, the NetBSD driver does not seem to have
code which could activate it. There is a bit defined in mpt_mpilib.h
which could be set in some kind of settings page


-The OpenBSD driver has a function to (de)activate the write caching
called mpi_ioctl_cache() (see:;content-type=text%2Fplain
). How would this be implemented in NetBSD? As a hack for testing,
does anybody see a chance to hard-code this bit-setting into the



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