What is a good choice of sata-ii raid controller for freebsd?
mandrews at bit0.com
Sat Feb 10 01:54:04 UTC 2007
Josh Paetzel wrote:
> What hardware RAID buys you over gmirror is that you can boot from it.
> 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?
Mike Andrews * mandrews at bit0.com * http://www.bit0.com
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