From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Chmielewski Subject: Re: Disappointing RAID10 Performance Date: Sat, 17 Oct 2009 18:20:24 +0200 Message-ID: <4AD9EEC8.9000701@wpkg.org> References: <364346.70897.qm@web38808.mail.mud.yahoo.com> <4AD8BBC3.4030600@wpkg.org> <4AD9ECE4.3090202@shiftmail.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4AD9ECE4.3090202@shiftmail.org> Sender: linux-raid-owner@vger.kernel.org To: Asdo Cc: linux-raid List-Id: linux-raid.ids Asdo wrote: > Tomasz Chmielewski wrote: >> If you start using your drives for two "dd if=bigfile[12] >> of=/dev/null" at the same time, you will notice the difference. > > OT: Does this dd line really work? I did see it elsewhere already but > doesn't appear to work for me: seems to see only the last if=. I don't think it does work. You see it everywhere because it's faster to write, and everyone gets the idea what's this all about. -- Tomasz Chmielewski http://wpkg.org