From owner-freebsd-fs@FreeBSD.ORG Sun Jan 23 13:13:31 2011 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 66BA8106566C for ; Sun, 23 Jan 2011 13:13:31 +0000 (UTC) (envelope-from kpielorz_lst@tdx.co.uk) Received: from mail.tdx.com (mail.tdx.com [62.13.128.18]) by mx1.freebsd.org (Postfix) with ESMTP id E42B38FC1B for ; Sun, 23 Jan 2011 13:13:30 +0000 (UTC) Received: from Octa64 (octa64.tdx.co.uk [62.13.130.232]) (authenticated bits=0) by mail.tdx.com (8.14.3/8.14.3/Kp) with ESMTP id p0NDDSH0066125; Sun, 23 Jan 2011 13:13:28 GMT Date: Sun, 23 Jan 2011 13:14:08 +0000 From: Karl Pielorz To: Bruce Cran Message-ID: <1032CC037935BA2DC2E60A4F@Octa64> In-Reply-To: <20110122172714.00002274@unknown> References: <1ABA88EDF84B6472579216FE@Octa64> <20110122111045.GA59117@icarus.home.lan> <20110122172714.00002274@unknown> X-Mailer: Mulberry/4.0.8 (Win32) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Cc: freebsd-fs@freebsd.org Subject: Re: Write cache, is write cache, is write cache? X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 23 Jan 2011 13:13:31 -0000 --On 22 January 2011 17:27 +0000 Bruce Cran wrote: > sysutils/fio supports that: just add "fsync=x" to the > configuration file and it'll send a request to the OS to flush the data > to disk every x blocks. That's great - thanks! - I'll check into that and test what exactly the "Enable drive write cache" option does (i.e. if it's all or nothing). Thanks, -Karl