From owner-freebsd-stable@FreeBSD.ORG Mon Aug 9 13:07:35 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 2BD411065674 for ; Mon, 9 Aug 2010 13:07:35 +0000 (UTC) (envelope-from alexvpetrov@gmail.com) Received: from mail-ew0-f54.google.com (mail-ew0-f54.google.com [209.85.215.54]) by mx1.freebsd.org (Postfix) with ESMTP id ABC6D8FC1A for ; Mon, 9 Aug 2010 13:07:34 +0000 (UTC) Received: by ewy26 with SMTP id 26so3954312ewy.13 for ; Mon, 09 Aug 2010 06:07:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:from:to:subject:date :user-agent:references:in-reply-to:cc:mime-version:content-type :content-transfer-encoding:message-id; bh=PVWfGEr7sUsuoOz7trAXbjr9jhyD1/dgCxTFNtx4I/0=; b=rlhFUhw+5c6rYjd+nf5zZ2PbyFHMUWhlxtnmfUbyX7eCY4JSTdJoLOKychfRfbVtqN C0TdpIXpJXmp7gfQcZ36ZstldPZ4z6IT2bQyLWfsmxAaEAIQGwGKHkFSmJQphPtlk8fL I3Ee82GBOqfpR2r3BbOV1y/vEmSGaZKBmFAso= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:subject:date:user-agent:references:in-reply-to:cc :mime-version:content-type:content-transfer-encoding:message-id; b=CCGghKeW7bUU+3TxgeBXje0VxnZeHgu2o1pavH/OfyYAxkOxtthDOmU5psIBA8vCqn A0xPJ4/bzsH4Jv5i0QbIn5bX1cch8p9leSc/YWY2tlsgSDkMVN+sq04ge3M8bRZdRDp6 fGSUPxGukinxIbA9BrtuK46cyXCw0hFxiLoVk= Received: by 10.213.32.212 with SMTP id e20mr12192413ebd.80.1281359253531; Mon, 09 Aug 2010 06:07:33 -0700 (PDT) Received: from alex.super ([91.195.101.86]) by mx.google.com with ESMTPS id v8sm7807018eeh.14.2010.08.09.06.07.28 (version=TLSv1/SSLv3 cipher=RC4-MD5); Mon, 09 Aug 2010 06:07:31 -0700 (PDT) From: "Alex V. Petrov" To: Jeremy Chadwick Date: Mon, 9 Aug 2010 21:07:23 +0800 User-Agent: KMail/1.13.5 (FreeBSD/8.1-STABLE; KDE/4.4.5; amd64; ; ) References: <201008042008.25679.alexvpetrov@gmail.com> <201008051409.57751.alexvpetrov@gmail.com> <20100805061959.GA92106@icarus.home.lan> In-Reply-To: <20100805061959.GA92106@icarus.home.lan> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201008092107.23819.alexvpetrov@gmail.com> Cc: 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: Mon, 09 Aug 2010 13:07:35 -0000 > Can you please remove use of the zpool entirely (e.g. zpool destroy > tank) and do a write test to each disk itself? E.g.: > > dd if=/dev/zero of=/dev/ad8 bs=64k count=1000000 > dd if=/dev/zero of=/dev/ad10 bs=64k count=1000000 > dd if=/dev/zero of=/dev/ad12 bs=64k count=1000000 > > Thanks. zpool destroy tank At one time 3 dd dd if=/dev/zero of=/dev/ad8 bs=64k count=1000000 1000000+0 records in 1000000+0 records out 65536000000 bytes transferred in 605.173955 secs (108292830 bytes/sec) dd if=/dev/zero of=/dev/ad10 bs=64k count=1000000 1000000+0 records in 1000000+0 records out 65536000000 bytes transferred in 759.946393 secs (86237662 bytes/sec) dd if=/dev/zero of=/dev/ad12 bs=64k count=1000000 1000000+0 records in 1000000+0 records out 65536000000 bytes transferred in 605.139062 secs (108299074 bytes/sec) Disks ad4 ad6 ad8 ad10 ad12 da0 da1 KB/t 0,00 16,00 64,00 64,00 64,00 0,00 0,00 tps 0 1 1667 1329 1646 0 0 MB/s 0,00 0,02 104 83,04 103 0,00 0,00 %busy 0 0 93 94 93 0 0 ie this problem is not the controller ----- Alex V. Petrov