From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1C0A5C3A589 for ; Tue, 20 Aug 2019 05:49:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ED103214DA for ; Tue, 20 Aug 2019 05:49:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729091AbfHTFtO (ORCPT ); Tue, 20 Aug 2019 01:49:14 -0400 Received: from guest-port.merlins.org ([173.11.111.148]:49457 "EHLO mail1.merlins.org" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1727006AbfHTFtN (ORCPT ); Tue, 20 Aug 2019 01:49:13 -0400 Received: from merlin by mail1.merlins.org with local (Exim 4.92 #3) id 1hzx16-0004Q8-Bl by authid ; Mon, 19 Aug 2019 22:49:12 -0700 Date: Mon, 19 Aug 2019 22:49:12 -0700 From: Marc MERLIN To: o1bigtenor Cc: linux-block@vger.kernel.org, Linux-RAID Subject: Re: 5.1.21 Dell 2950 terrible swraid5 I/O performance with swraid on top of Perc 5/i raid0/jbod Message-ID: <20190820054912.GJ5431@merlins.org> References: <20190819070823.GH12521@merlins.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Sysadmin: BOFH X-URL: http://marc.merlins.org/ User-Agent: Mutt/1.5.13 (2006-08-11) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: marc@merlins.org Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Mon, Aug 19, 2019 at 06:42:23AM -0500, o1bigtenor wrote: > Not to discourage you from a possibly interesting and fruitful endeavor > but when I bought myself a slightly newer dell server I traded out the > PERC card for a newer version (model 700 IIRC) and then I things > were quite a big different. Said board, bought used, wasn't very > expensive. YMMV Well, just received my H700 today, plugged it in, not everything is perfect because I'm missing a cable, but sure enough, my rebuild speeds got 8 times faster and the system stopped hanging all the time if I do any I/O. I still think there was something fairly unexpected/wrong with the Perc 5/i outside of it being a cheap card, but I have other things to worry about to spend more time to find out :) That said, if anyone wants the card for cost of shipping (US only please, shipping abroad is too much of a pain), let me know and I'll give it to you. Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/