From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bill Davidsen Subject: Re: AWFUL reshape speed with raid5. Date: Wed, 30 Jul 2008 13:24:25 -0400 Message-ID: <4890A3C9.9070409@tmr.com> References: <48909578.9020307@tmr.com> <48909BBD.4030605@dgreaves.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <48909BBD.4030605@dgreaves.com> Sender: linux-raid-owner@vger.kernel.org To: David Greaves Cc: Jon Nelson , Justin Piszcz , LinuxRaid List-Id: linux-raid.ids David Greaves wrote: > Bill Davidsen wrote: > >> vmstat doesn't tell you enough, you need a tool to show per-device and >> per-partition io, which will give you what you need. I can't put a >> finger on the one I wrote, but there are others. >> > > iostat? > dstat seems to do what he wants, the one I wrote produced a file which could be used by gnuplot to generate neat graphical output to make problems glaringly obvious. -- Bill Davidsen "Woe unto the statesman who makes war without a reason that will still be valid when the war is over..." Otto von Bismark