Date: Tue, 15 Jan 2013 16:27:48 -0800 From: Dieter BSD <dieterbsd@gmail.com> To: freebsd-hackers@freebsd.org Subject: Re: IBM blade server abysmal disk write performances Message-ID: <CAA3ZYrANmX=ixNrUag41%2Bbkyp=HTROfE3DscBWSiew00qB4eqg@mail.gmail.com>
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I wrote: > The kernel must be doing write-behind even to a raw disk, otherwise > waiting for write(2) to return before issuing the next write would > slow it down as Matthew suggests. And a minute after hitting send, I remembered that FreeBSD does not provide the traditional "raw" disk devices, e.g. /dev/rda0 with an 'r'. (Now if I could just remember *why* it doesn't.)
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