From owner-freebsd-fs@FreeBSD.ORG Mon Dec 1 17:56:51 2014 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 4BE155A0 for ; Mon, 1 Dec 2014 17:56:51 +0000 (UTC) Received: from fs.denninger.net (wsip-70-169-168-7.pn.at.cox.net [70.169.168.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "NewFS.denninger.net", Issuer "NewFS.denninger.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 06C4EF94 for ; Mon, 1 Dec 2014 17:56:50 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by fs.denninger.net (8.14.9/8.14.8) with ESMTP id sB1HuaS3034337 for ; Mon, 1 Dec 2014 11:56:39 -0600 (CST) (envelope-from karl@denninger.net) Received: from [127.0.0.1] (TLS/SSL) [208.54.90.242] by Spamblock-sys (LOCAL/AUTH); Mon Dec 1 11:56:39 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Mailer: BlackBerry Email (10.3.1.1154) Message-ID: <20141201175639.4309067.12451.1776@denninger.net> Date: Mon, 01 Dec 2014 12:56:39 -0500 Subject: Re: Irregular disk IO and poor performance (possibly after reading a lot of data from pool) From: Karl Denninger In-Reply-To: <547CA9F5.7030300@internetx.com> References: <1417438604.143909513.k6b3b33f@frv41.fwdcdn.com> <547CA5AA.8080105@multiplay.co.uk> <547CA9F5.7030300@internetx.com> To: freebsd-fs@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 01 Dec 2014 17:56:51 -0000 =E2=80=8EYou may have one or more drives taking seek errors and retrying; I= 've seen similar behavior. Smartctl *might* disclose this -- the bad news i= s that some drives do not log these events! --=C2=A0Karl (On=C2=A0Passport=C2=A0PDA) =C2=A0 Original Message =C2=A0 From: InterNetX - Juergen Gotteswinter Sent: Monday, December 1, 2014 12:49 To: freebsd-fs@freebsd.org Reply To: juergen.gotteswinter@internetx.com Subject: Re: Irregular disk IO and poor performance (possibly after reading= a lot of data from pool) looks kinda strange, too? could you add the output of zpool status -vv gstat -c could be helpful, too as well as good old smartctl -a Am 01.12.2014 um 18:30 schrieb Steven Hartland: > disk1 mountpoint=20 > /......... local _______________________________________________ freebsd-fs@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-fs To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" %SPAMBLOCK-SYS: Matched [@freebsd.org+], message ok