Josh Paetzel wrote:
What hardware RAID buys you over gmirror is that you can boot from it.
[snip]
From a raw speed perspective on an unloaded CPU a 3.0ghz processor is probably just as fast or faster than the embedded processor on a RAID card running at a few hundred mhz. Sure, once you start talking about CPUs at full load there are advantages to off-loading stuff to a dedicated processor.
What hardware RAID buys me over gmirror is that SATA2 NCQ actually works on recent hardware RAID cards, and doesn't on gmirror -- at least according to the ata(4) manpage on 6.2-RELEASE. Depending on your specific application, that could have a performance impact, no?
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