From mboxrd@z Thu Jan 1 00:00:00 1970 From: Phil Turmel Subject: Re: Linux software RAID assistance Date: Fri, 18 Feb 2011 08:26:39 -0500 Message-ID: <4D5E738F.2060509@turmel.org> References: <4D540F6C.6050904@gmail.com> <20110215155315.55d35b8e@notabene.brown> <4D5A92F3.1090004@turmel.org> <4D5BD678.2050200@gmail.com> <4D5BE119.7000804@turmel.org> <4D5C0E17.3060306@gmail.com> <4D5C140F.9010301@turmel.org> <4D5C1508.3040308@gmail.com> <4D5C15D3.1070608@turmel.org> <4D5C167C.7000101@turmel.org> <4D5C1CF8.1020507@gmail.com> <4D5C1E0B.9060300@turmel.org> <4D5C2061.4060106@gmail.com> <4D5C2143.3000907@turmel.org> <4D5C2260.3020800@gmail.com> <4D5C273E.7020609@turmel.org> <4D5E7123.5020103@turmel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Roberto Spadim Cc: Simon Mcnair , NeilBrown , linux-raid@vger.kernel.org List-Id: linux-raid.ids On 02/18/2011 08:21 AM, Roberto Spadim wrote: > pci express x4 = 2.5*4gbps = 10gbps not?! Subtract transfer overhead (Framing, ECC, addressing, etc) and it takes >8 bits to transfer 8 bits. I haven't checked the spec, but it looks like just framing and ECC is +25%.