Date: Sat, 1 Mar 2014 06:33:58 GMT From: "A.J. Kehoe IV (Nanoman)" <3LmB4Mvj@nanoman.ca> To: freebsd-gnats-submit@FreeBSD.org Subject: conf/187161: FreeBSD memstick Images Fail to Boot from Read-Only Media Message-ID: <201403010633.s216XwsA029236@cgiserv.freebsd.org> Resent-Message-ID: <201403010640.s216e1an073840@freefall.freebsd.org>
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>Number: 187161 >Category: conf >Synopsis: FreeBSD memstick Images Fail to Boot from Read-Only Media >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Mar 01 06:40:01 UTC 2014 >Closed-Date: >Last-Modified: >Originator: A.J. Kehoe IV (Nanoman) >Release: 10.0-RELEASE >Organization: Nanoman's Company >Environment: FreeBSD localhost 10.0-RELEASE FreeBSD 10.0-RELEASE #0 r260789: Thu Jan 16 22:34:59 UTC 2014 root@snap.freebsd.org:/usr/obj/usr/src/sys/GENERIC amd64 >Description: By default, /etc/rc.d/root tries to mount the root filesystem as read-write, which causes startup to abort when booting from read-only media that was created using the official memstick images. >How-To-Repeat: 1. Get a USB flash drive that has a write protection switch. 2. Disable write protection on the USB flash drive. 3. Connect the USB flash drive to your system. 4. dd if=/path/to/FreeBSD-10.0-RELEASE-amd64-memstick.img of=/dev/usbflashdrive 5. Enable write protection on the USB flash drive. 6. Boot your system from the USB flash drive. >Fix: On the system that creates the official FreeBSD memstick images: echo 'root_rw_mount="NO"' >> /path/to/memstick/etc/rc.conf To patch your current memstick image before creating your read-only media: 1. mdconfig -a -t vnode -u 0 -f /path/to/FreeBSD-10.0-RELEASE-amd64-memstick.img 2. mount -t ufs /dev/md0 /mnt 3. echo 'root_rw_mount="NO"' >> /mnt/etc/rc.conf 4. umount /mnt 5. mdconfig -d -u 0 >Release-Note: >Audit-Trail: >Unformatted:
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