From owner-freebsd-current@FreeBSD.ORG Thu Jan 22 11:44:01 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 06CDA16A4CE for ; Thu, 22 Jan 2004 11:44:01 -0800 (PST) Received: from bunrab.catwhisker.org (adsl-63-193-123-122.dsl.snfc21.pacbell.net [63.193.123.122]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8BEA443D5A for ; Thu, 22 Jan 2004 11:43:05 -0800 (PST) (envelope-from david@catwhisker.org) Received: from bunrab.catwhisker.org (localhost [127.0.0.1]) i0MJh5Gc072030 for ; Thu, 22 Jan 2004 11:43:05 -0800 (PST) (envelope-from david@bunrab.catwhisker.org) Received: (from david@localhost) by bunrab.catwhisker.org (8.12.10/8.12.10/Submit) id i0MJh5hL072029 for freebsd-current@freebsd.org; Thu, 22 Jan 2004 11:43:05 -0800 (PST) (envelope-from david) Date: Thu, 22 Jan 2004 11:43:05 -0800 (PST) From: David Wolfskill Message-Id: <200401221943.i0MJh5hL072029@bunrab.catwhisker.org> To: freebsd-current@freebsd.org In-Reply-To: <20040122193310.GA2758@memnoch.jk.homeunix.net> Subject: Re: Downgrade FreeBSD 5.1 or 5.2 -> 4.9 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Jan 2004 19:44:01 -0000 >Date: Thu, 22 Jan 2004 11:33:10 -0800 >From: John Kennedy >To: freebsd-current@freebsd.org >Subject: Re: Downgrade FreeBSD 5.1 or 5.2 -> 4.9 >Sender: owner-freebsd-current@freebsd.org > Will 4.x and 5.x play nice if they have a partition (slice?) in common? They can (play nice), yes. It helps to use UFS1 file systems. :-} > For example, /home that was mounted by both a 4.x and 5.x depending on >whatever was booted at the moment. Probably have UFS issues, but I don't >know if 5.x will "corrupt" a 4.x filesystem. On my laptop, on which I have been tracking both -STABLE and -CURRENT for quite a while, /home is a symlink (for each bootable /) to /common/home. Here is how things look while running -STABLE: localhost(4.9-S)[1] df -k Filesystem 1K-blocks Used Avail Capacity Mounted on /dev/ad0s1a 161262 47614 100748 32% / mfs:24 515606 16 474342 0% /tmp /dev/ad0s1e 1902528 1084144 666182 62% /usr /dev/ad0s2a 161262 77676 70686 52% /S2 /dev/ad0s2e 1902528 1016476 733850 58% /S2/usr /dev/ad0s3a 161262 78218 70144 53% /S3 /dev/ad0s3e 1899102 1014676 732498 58% /S3/usr /dev/ad0s3f 1016303 26938 908061 3% /var /dev/ad0s3g 10163268 8736126 614081 93% /common /dev/ad0s3h 16531530 994612 14214396 7% /bkp procfs 4 4 0 100% /proc localhost(4.9-S)[2] While running -CURRENT, I boot from ad0s3a, and I don't mount anything (by default) from slice 1 or 2. ad0s3f gets mounted on /var, ad0s3g gets mounted on /common, and ad0s3b is used as swap (with a swap-backed /tmp) in all cases. > I downgraded via reinstall once, but set up two partitions so I could >work on either one if I wanted to. I haven't tried mix-n-match though. There was a problem a while back, when -STABLE's fsck was unhappy with the way -CURRENT's fsck left things. That was quite a while back, though, and was fixed fairly quickly. Peace, david -- David H. Wolfskill david@catwhisker.org I do not "unsubscribe" from email "services" to which I have not explicitly subscribed. Rather, I block spammers' access to SMTP servers I control, and encourage others who are in a position to do so to do likewise.