From owner-freebsd-questions@FreeBSD.ORG Sat Mar 24 03:39:55 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id A1FB516A406 for ; Sat, 24 Mar 2007 03:39:55 +0000 (UTC) (envelope-from youshi10@u.washington.edu) Received: from mxout1.cac.washington.edu (mxout1.cac.washington.edu [140.142.32.134]) by mx1.freebsd.org (Postfix) with ESMTP id 7DCB413C469 for ; Sat, 24 Mar 2007 03:39:55 +0000 (UTC) (envelope-from youshi10@u.washington.edu) Received: from smtp.washington.edu (smtp.washington.edu [140.142.33.7] (may be forged)) by mxout1.cac.washington.edu (8.13.7+UW06.06/8.13.7+UW07.03) with ESMTP id l2O3ds6k013857 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Fri, 23 Mar 2007 20:39:55 -0700 X-Auth-Received: from [192.168.10.42] (c-67-187-172-183.hsd1.ca.comcast.net [67.187.172.183]) (authenticated authid=youshi10) by smtp.washington.edu (8.13.7+UW06.06/8.13.7+UW07.03) with ESMTP id l2O3dqIc002429 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT) for ; Fri, 23 Mar 2007 20:39:54 -0700 Mime-Version: 1.0 (Apple Message framework v752.2) In-Reply-To: <20070323191553.GA68241@owl.midgard.homeip.net> References: <200703231825.LAA01153@lariat.net> <20070323191553.GA68241@owl.midgard.homeip.net> X-Gpgmail-State: !signed Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <316B1964-FF49-4A8E-96CE-ADAFAE78C57D@u.washington.edu> Content-Transfer-Encoding: 7bit From: Garrett Cooper Date: Fri, 23 Mar 2007 20:39:53 -0700 To: FreeBSD Questions X-Mailer: Apple Mail (2.752.2) X-PMX-Version: 5.3.0.289146, Antispam-Engine: 2.5.0.283055, Antispam-Data: 2007.3.23.202433 X-Uwash-Spam: Gauge=IIIIIII, Probability=7%, Report='__CP_URI_IN_BODY 0, __CT 0, __CTE 0, __CT_TEXT_PLAIN 0, __FRAUD_419_REFNUM 0, __HAS_MSGID 0, __HAS_X_MAILER 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __SANE_MSGID 0' Subject: Re: Upgrade from 4.x -> 6.2: Old file systems? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 24 Mar 2007 03:39:55 -0000 On Mar 23, 2007, at 12:15 PM, Erik Trulsson wrote: > On Fri, Mar 23, 2007 at 11:36:21AM -0700, youshi10@u.washington.edu > wrote: >> On Fri, 23 Mar 2007, Brett Glass wrote: >> >>> I have a server which I am considering upgrading from 4.11 to >>> 6.2. Besides >>> the operating system disk (which contains all of the expected >>> partitions >>> such as /, /usr, /var, and /tmp), There's a large data disk on >>> the system >>> containing useful data that I'd like to put back online as soon >>> as the >>> upgrade is completed. I'd rather not have to reformat it unless >>> there is a >>> significant advantage to doing so. Does 6.2 work properly with >>> the older >>> disk format? Is there any reason to take the time and effort to >>> back up >>> the data and restore it to the new format? Is there anything I'll >>> need to >>> be careful about if I upgrade just the system disk? >>> >>> --Brett Glass >> >> Brett, >> Yes, 6.2 does but there are features that were added to UFS2 >> (softupdates, file size limit raised past 2GB?) which make it >> a much >> better filesystem infrastructure than UFS1. > > The things you mention (softupdates, large files) were and are well > supported > with UFS1 too. There were not really much features added with UFS2 > (support > for very large disks (> 1 TB) and some support for extra flags and > attributes are what I can think of right now.) > > There is not really any significant gains to be had from converting > the > existing file systems from UFS1 to UFS2. > FreeBSD 6.2 should work just fine with the older disk. Sorry. I meant "snapshots", a feature of softupdates, which according to McKusick (dev author of softupdates?) are available post 5.0. Reference: . -Garrett