From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robin Bowes Subject: Re: non-optimal RAID 5 performance with 8 drive array Date: Tue, 01 Mar 2005 17:53:54 +0000 Message-ID: References: <42246D1F.3070407@variant.ch> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit In-Reply-To: <42246D1F.3070407@variant.ch> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Nicola Fankhauser wrote: > see [3] for a description of what I did and more details. Hi Nicola, I read your description with interest. I thought I'd try some speed tests myself but dd doesn't seem to work the same for me (on FC3). Here's what I get: [root@dude test]# dd if=/dev/zero of=/home/test/test.tmp bs=4096 count=100000 100000+0 records in 100000+0 records out Notice there is no timing information. For the read test: [root@dude test]# dd of=/dev/null if=/home/test/test.tmp bs=4096 100000+0 records in 100000+0 records out Again, no timing information. Anyone know if this is a quirk of the FC3 version of dd? R. -- http://robinbowes.com