Date: Sun, 19 Sep 2004 19:07:17 -0400 (EDT) From: Charles Bacon <crtb@cape.com> To: FreeBSD-gnats-submit@FreeBSD.org Cc: Chuck Bacon <crtb@cape.com> Subject: misc/71918: 4.5 disklabel gets damaged when mounted by 5.2.1-R Message-ID: <20040919190455.I75932-100000@tomato.local> Resent-Message-ID: <200409192310.i8JNAMt4088688@freefall.freebsd.org>
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>Number: 71918 >Category: misc >Synopsis: 4.5 disklabel gets damaged when mounted by 5.2.1-R >Confidential: no >Severity: serious >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Sep 19 23:10:22 GMT 2004 >Closed-Date: >Last-Modified: >Originator: Chuck Bacon >Release: FreeBSD 5.2.1-RELEASE i386 >Organization: none >Environment: FreeBSD daisy.local 5.2.1-RELEASE FreeBSD 5.2.1-RELEASE #0: Mon Feb 23 20:45:55 GMT 2004 root@wv1u.btc.adaptec.com:/usr/obj/usr/src/sys/GENERIC i386 (see uname -a above) >Description: Making a new 5.2.1-R slice on an existing 4.5-R system. Installation and boot OK, mount existing 4.5-R filesystems under 5.2.1-R also OK. Trouble when booting from 4.5-R on same disk, complaint of bad boot block. Hunting for superblocks succeeds in restoring 4.5-R FS. Note UFS1-UFS2 distinction irrelevant here. >How-To-Repeat: 1. Create and then boot a 5.2.1-R partition on an otherwise 4.x disk 2. Mount, then umount, a 4.x partition on the running 5.2.1-R system. 3. Shutdown -r and now, boot the 4.x OS. 4. Mount the 4.x partition previously mounted under 5.2.1-R (or try!) >Fix: Sorry, I'm not very smart about fdisk/disklabel/bsdlabel etc. >Release-Note: >Audit-Trail: >Unformatted: >Comment: It's been some months, and this box is now all 5.2.1-R, since I have an ATI AGP RADEON board, unknown to the X subsystem on 4.5-R. I may have the details wrong, such as disklabel; I may have used a different approach to restore.
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