Date: Thu, 7 Oct 1999 19:39:50 -0700 (PDT) From: Tom <tom@sdf.com> To: The Hermit Hacker <scrappy@hub.org> Cc: freebsd-scsi@freebsd.org Subject: Re: DPT Controller options ... one question Message-ID: <Pine.BSF.4.05.9910071936170.17882-100000@misery.sdf.com> In-Reply-To: <Pine.BSF.4.10.9910080106280.30583-100000@thelab.hub.org>
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On Fri, 8 Oct 1999, The Hermit Hacker wrote: > > Okay, thanks... > > If there are cache's on the DPT controllers, does the OS make use of > that, or is it automagic and transparent to the OS? Just want to make > sure I'm getting full use of these things... > > Thanks... The onboard cache is transparent to the host. Howerver, there are many settings available for tuning it though. You can set things like delay before writing, and maximum amount of cache that can be "dirty" before a flush is forced. Regardless, DPT IV cards are optimized for random access. My DPT IV card never benchmarked well, but on a mail server, it always exceeded my expectations. Tom To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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