Date: Fri, 4 Nov 2005 13:26:02 -0800 From: "Ted Mittelstaedt" <tedm@toybox.placo.com> To: "Steve Bertrand" <iaccounts@ibctech.ca>, <gayn.winters@bristolsystems.com>, <freebsd-questions@freebsd.org> Subject: RE: gmirror on 1 or 2 IDE cables Message-ID: <LOBBIFDAGNMAMLGJJCKNEELIFCAA.tedm@toybox.placo.com> In-Reply-To: <20051103152751.C48FC43D49@mx1.FreeBSD.org>
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>-----Original Message----- >From: owner-freebsd-questions@freebsd.org >[mailto:owner-freebsd-questions@freebsd.org]On Behalf Of Steve Bertrand >Sent: Thursday, November 03, 2005 7:28 AM >To: gayn.winters@bristolsystems.com; freebsd-questions@freebsd.org >Subject: RE: gmirror on 1 or 2 IDE cables > > > >> Using gmirror to mirror two identical drives, how much of a >> performance hit is it to have >> >> 1. Both drives on one IDE cable? >> Compared to: >> 2. One drive primary on one cable and one secondary on the >> other cable? >> Compared to: >> 3. Both drives primary but on separate IDE cables? > >My understanding that only a single drive on each IDE channel can be >accessed at any one time. > Which may or may not matter depending on what he's doing. Are we talking mainly reads or writes here? Ted
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