From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stan Hoeppner Subject: Re: advice to low cost hardware raid (with mdadm) Date: Wed, 15 Sep 2010 17:25:02 -0500 Message-ID: <4C9147BE.60200@hardwarefreak.com> References: <00c6ed0254381567aff38d7a95d200c5.squirrel@fuckaround.org> <4C912F5D.5040305@hardwarefreak.com> <20100915214013.GA19900@www2.open-std.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20100915214013.GA19900@www2.open-std.org> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids 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 Tbit/s for 32/33 PCI? I think you're a little high.. by a factor of 1000, Keld. :) The chipset to processor interface on modern systems is typically aroun= d 8-16 GB/s, or 64-128 Gb/s. That's still a factor of 10x lower than 1 Tbit/s, so you're high by a factor of 20x. 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 boar= d level communication paths-- Bytes/s not bits/sec. You must work for Ericsson. ;) Regardless of bit rate values, we agree on the important part, for the most part. :) --=20 Stan -- 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