From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Subject: Re: Intel X25-M MLC SSD benchmarks Date: Wed, 10 Dec 2008 14:39:37 -0700 Message-ID: <20081210213937.GC25548@parisc-linux.org> References: <83CA05F64804AF43B8F733C4ABDFAA51022D04D4@mail1.bitband.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from palinux.external.hp.com ([192.25.206.14]:52622 "EHLO mail.parisc-linux.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751382AbYLJVji (ORCPT ); Wed, 10 Dec 2008 16:39:38 -0500 Content-Disposition: inline In-Reply-To: <83CA05F64804AF43B8F733C4ABDFAA51022D04D4@mail1.bitband.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Raz Ben-Yehuda Cc: linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org On Wed, Dec 10, 2008 at 11:15:12PM +0200, Raz Ben-Yehuda wrote: > Hello > I am wondering if anyone tried Intel new disks. I benchmark them and I > am a bit confused. > According to the spec a single disk should provide 70MB/s write and 250 > MB/s read. Reads are ok. I am reaching this number, but writes are bad. > With writes I am getting 20MB/s. > I am using a dd for the test, and a deadline-line scheduler. What command exactly are you using, and have you tried using the no-op elevator instead of deadline? Also, what controller is it hooked up to? -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step."