From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jay Strauss Subject: Re: Raid 1 install revealed poor HD performance (I think) Date: Tue, 17 May 2005 15:51:26 -0500 Message-ID: <428A594E.5080207@heyjay.com> References: <428A09A3.9000802@heyjay.com> <428A1924.8030801@heyjay.com> <428A2133.4080202@h3c.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <428A2133.4080202@h3c.com> Sender: linux-raid-owner@vger.kernel.org To: Mike Hardy Cc: Gordon Henderson , linux-raid@vger.kernel.org List-Id: linux-raid.ids > I was sure it would be DMA too :-). Wonder if multicount makes that much > of a difference? It doesn't, I tried just before leaving this morning. No diff. > > Either way, one of the first things I typically do on a server is add an > hdparm line with whatever the disks need for that particular machine. I don't understand the above "whatever the disks need" portion of this statement. Can you give me a little more detail? > So, even if you can't get your distribution to tune your IDE chipset and > IDE hard drives perfectly, with something like multicount or write > caching, its effective (IMHO) to just force your settings on boot. What settings am I to force? And to what values? I guess I'm asking, are you saying just put the hdparm setting in a rc.local? If so, I'm still stumped on what those settings need to be Thanks Jay