From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keld =?iso-8859-1?Q?J=F8rn?= Simonsen Subject: Re: advice to low cost hardware raid (with mdadm) Date: Thu, 16 Sep 2010 14:05:14 +0200 Message-ID: <20100916120514.GA28175@www2.open-std.org> References: <00c6ed0254381567aff38d7a95d200c5.squirrel@fuckaround.org> <4C912F5D.5040305@hardwarefreak.com> <20100915214013.GA19900@www2.open-std.org> <4C9147BE.60200@hardwarefreak.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <4C9147BE.60200@hardwarefreak.com> Sender: linux-raid-owner@vger.kernel.org To: Stan Hoeppner Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Wed, Sep 15, 2010 at 05:25:02PM -0500, Stan Hoeppner wrote: > Keld J=F8rn Simonsen put forth on 9/15/2010 4:40 PM: > > These ports are connected to the > > south bridge often with 20 Tbit/s or more, while a controller on an > > 32 bit PCI only delivers 1 TBit.=20 >=20 > Tbit/s for 32/33 PCI? I think you're a little high.. by a factor of > 1000, Keld. :) yes, you are right. I meant Gbit/s > Why, may I ask, are you quoting serial data rates for parallel buses? > I've only seen inter-chip bandwidth quoted in serial rates on > communications gear. Everyone else quotes parallel data rates for bo= ard > level communication paths-- Bytes/s not bits/sec. You must work for > Ericsson. ;) because I have seen specs given in bit/s. Eg southbridge speeds, and=20 speeds of PCIe (2,5 Gbit/s per lane). I agree that people probably wan= t speeds in MB/s. > Regardless of bit rate values, we agree on the important part, for th= e > most part. :) I think so, too. keld -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html