Hosted servers with good DB disk performance?

I keep falling into situations where it would be nice to host a server
somewhere else.  Virtual host solutions and the mysterious cloud are no
good for the ones I run into though, as disk performance is important for
all the applications I have to deal with.

What I'd love to have is a way to rent a fairly serious piece of dedicated
hardware, ideally with multiple (at least 4) hard drives in a RAID
configuration and a battery-backed write cache.  The cache is negotiable.
Linux would be preferred, FreeBSD or Solaris would also work; not Windows
though (see "good DB performance").

Is anyone aware of a company that offers such a thing?

--
* Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD