From owner-freebsd-fs@FreeBSD.ORG Thu Apr 27 12:06:24 2006 Return-Path: X-Original-To: freebsd-fs@freebsd.org Delivered-To: freebsd-fs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 64E0616A403 for ; Thu, 27 Apr 2006 12:06:24 +0000 (UTC) (envelope-from anderson@centtech.com) Received: from mh1.centtech.com (moat3.centtech.com [207.200.51.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id ECC4D43D4C for ; Thu, 27 Apr 2006 12:06:23 +0000 (GMT) (envelope-from anderson@centtech.com) Received: from [10.177.171.220] (neutrino.centtech.com [10.177.171.220]) by mh1.centtech.com (8.13.1/8.13.1) with ESMTP id k3RC6K8S034943; Thu, 27 Apr 2006 07:06:23 -0500 (CDT) (envelope-from anderson@centtech.com) Message-ID: <4450B3B1.8070704@centtech.com> Date: Thu, 27 Apr 2006 07:06:09 -0500 From: Eric Anderson User-Agent: Thunderbird 1.5 (X11/20060402) MIME-Version: 1.0 To: Kris Kennaway References: <444FE114.7010106@mhi-tx.com> <20060426211059.GA85780@xor.obsecurity.org> In-Reply-To: <20060426211059.GA85780@xor.obsecurity.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV 0.87.1/1426/Wed Apr 26 13:03:01 2006 on mh1.centtech.com X-Virus-Status: Clean Cc: freebsd-fs@freebsd.org, Robert Subject: Re: suspend writes for external snapshot 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: Thu, 27 Apr 2006 12:06:24 -0000 Kris Kennaway wrote: > On Wed, Apr 26, 2006 at 04:07:32PM -0500, Robert wrote: >> Greetings, >> I am trying to determine if there is a way to suspend write activity on >> a FreeBSD filesystem (currently 6.0R) in order to take a snapshot with >> external SAN software (Falconstor IPStor)? > > Use a FreeBSD snapshot and then image that? He can't do it that way because the Falconstor is a raw block device and has no idea the difference between a snapshot and other filesystem bits. Robert - we have some very alpha patches in house that allow suspension of UFS filesystems for things like this (also working on online UFS growing). I'm not sure how close we really are to letting it loose in the wild, but we will definitely be making all the patches available to whomever wants it. Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology Anything that works is better than anything that doesn't. ------------------------------------------------------------------------