From owner-freebsd-stable@FreeBSD.ORG Thu Aug 5 04:15:25 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 55BA9106564A for ; Thu, 5 Aug 2010 04:15:25 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from qmta15.westchester.pa.mail.comcast.net (qmta15.westchester.pa.mail.comcast.net [76.96.59.228]) by mx1.freebsd.org (Postfix) with ESMTP id 01B898FC16 for ; Thu, 5 Aug 2010 04:15:24 +0000 (UTC) Received: from omta15.westchester.pa.mail.comcast.net ([76.96.62.87]) by qmta15.westchester.pa.mail.comcast.net with comcast id qUCW1e0011swQuc5FUFRKx; Thu, 05 Aug 2010 04:15:25 +0000 Received: from koitsu.dyndns.org ([98.248.41.155]) by omta15.westchester.pa.mail.comcast.net with comcast id qUFP1e00D3LrwQ23bUFQft; Thu, 05 Aug 2010 04:15:25 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id 6FA229B427; Wed, 4 Aug 2010 21:15:22 -0700 (PDT) Date: Wed, 4 Aug 2010 21:15:22 -0700 From: Jeremy Chadwick To: Joshua Boyd Message-ID: <20100805041522.GA89331@icarus.home.lan> References: <201008042008.25679.alexvpetrov@gmail.com> <201008042213.31631.alexvpetrov@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Cc: "Alex V. Petrov" , freebsd-stable@freebsd.org Subject: Re: zpool - low speed write X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Aug 2010 04:15:25 -0000 On Wed, Aug 04, 2010 at 10:13:36PM -0400, Joshua Boyd wrote: > On Wed, Aug 4, 2010 at 10:13 AM, Alex V. Petrov wrote: > > > interesting results: > > > > From single-UDF-disk to pool: > > $ dd if=petrovs-disk1.iso of=/tank/petrovs-disk1.iso bs=1M > > 3545+1 records in > > 3545+1 records out > > 3718002688 bytes transferred in 438.770195 secs (8473690 bytes/sec) > > > > From single-UDF-disk to null: > > $ dd if=petrovs-disk1.iso of=/dev/null bs=1M > > 3545+1 records in > > 3545+1 records out > > 3718002688 bytes transferred in 83.304575 secs (44631435 bytes/sec) > > ------ > > Alex V. Petrov > > _______________________________________________ > > freebsd-stable@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" > > > > What controllers are you using? > > What's the results of dd if=/dev/ada4 of=/dev/null bs=1M count=100 ? His problem is with writes, not reads. I strongly doubt his problem is with the controller (Intel ICHxx and ESBxx controllers are heavily tested on FreeBSD, both with and without AHCI, including ahci.ko). -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |