> It seems that this was caused by the (infamous) problem when
> softupdates and write caching are both enabled. Disabling write
> caching seems to have fixed the problem.
Interesting. The disk write cache being on should only cause
problems if the system goes down hard/unclean, e.g. power failure.
Unless the disk firmware has a bug? Anyway the disk write cache
should be off, since even a UPS can't guarantee that the system
will not go down hard.
> Unfortunately the disk write performance is woeful. There must
> be a better way surely?
I think that getting NCQ support would help greatly.
There are also problems like the one with nforce4 and
some brands of disks:
It is not obvious what any of this would have to do with mirroring vs.
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