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Date: Wed, 09 Jun 2010 12:44:39 +1000
From: Andrew Snow <andrew@modulus.org>
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To: "Bradley W. Dutton" <brad@duttonbros.com>, freebsd-fs@freebsd.org
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Subject: Re: ZFS performance of various vdevs (long post)
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Under opensolaris, the LSI-based controllers seem to use interrupt 
coalescing, and you can even tweak the settings via lsiutil.  When you 
disable it, things go alot slower.  I suspect this is the reason for the 
speed difference of sequential transfer rates vs FreeBSD.

- Andrew