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Date:      Sun, 18 Jan 2009 15:33:30 +0100 (CET)
From:      Alexander Best <alexbestms@math.uni-muenster.de>
To:        <freebsd-current@freebsd.org>
Subject:   periodic(8) daily should backup bsdlabel(8) / fdisk(8) disk labels
Message-ID:  <permail-200901181433301e86ffa8000037a6-a_best01@message-id.uni-muenster.de>
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[-- Attachment #1 --]
hi there,

i was browsing the pr-db and found this pr:
http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/86388

i think it would be a very nice addition to daily. i attached
220.backup-bsdlabels. it can also be found here:
http://digitalfreaks.org/~lavalamp/220.backup-bsdlabels

backing up the disk labels on a daily basis sounds like a really good thing to
do. also the pr states that netbsd and openbsd are doing this for over 10
years now.

cheers.
alex

[-- Attachment #2 --]
#!/bin/sh
#
# $FreeBSD: src/etc/periodic/daily/220.backup-bsdlablels******
#

# $Id: 220.backup-bsdlabels 36 2006-06-12 21:50:35Z seklecki $
# Ripped right out NetBSD /etc/daily.   Backup FDISK MBR and BSD 
# Disklabel data to local filesystem to be picked up by periodic
# offsite data recovery/storage mechanism (Bacula, Amanda, pax(1))
# to simplify recovery to identical geometry hardware at secondary/
# backup datacenter ~BAS


# If there is a global system configuration file, suck it in.
#
if [ -r /etc/defaults/periodic.conf ]
then
    . /etc/defaults/periodic.conf
    source_periodic_confs
fi

case "$daily_backup_bsdlabels_enable" in
    [Yy][Ee][Ss])


    bak=/var/backups

	# test debug
	# disks="ad0"
    disks=$(sysctl -n kern.disks);

	if [ -n "$daily_backup_bsdlabels_include" ]; then
		#daily_backup_bsdlabels_include=$(echo ${daily_backup_bsdlabels_include}|sed -e "s/\//\_/g")
		disks="${disks} ${daily_backup_bsdlabels_include}"
	fi

	if [ -n "$daily_backup_bsdlabels_exclude" ]; then
		disks=$(echo ${disks} | sed -e "s/${daily_backup_bsdlabels_exclude}//g")
	fi

	if [ -z "$disks"  ]; then
		echo '$daily_backup_disklabels_enable" is set but no disk probed by kernel.' \
		"perhaps NFS diskless client."
		rc = 2
	else

		echo "Backing up device MBR and BSD labels for: ${disks}";
	
		for i in ${disks}; do
	
			# first order of business is to check for an existing backup-backup
			if [ -f ${bak}/fdisk.${i}.bak ] ; then
				rc=1
				echo "rotating $bak/fdisk.${i}.bak"
				cp -pf ${bak}/fdisk.${i}.bak $bak/fdisk.${i}.bak2 || rc=3
			fi
	
			echo "backing up fdisk for ${i}"
	
			fdisk ${i} > "${bak}/$(echo "fdisk.${i}.bak"| sed -e "s/\//\_/g")" 2>/dev/null || rc=3
	
			# again exept now we have to get a list of patitions/slices
			# sparc64 can have...9 hopefully slices on a sunlabel?
			part_slices=$(echo /dev/${i}s[0-9])
	
			for j in $(echo "$part_slices" | sed 's/\/dev\///'); do
				if [ -f ${bak}/disklabel.${j}.bak ] ; then
					rc=1
					echo "rotating ${bak}/disklabel.${j}.bak"
					cp -fp ${bak}/disklabel.${j}.bak ${bak}/disklabel.${j}.bak2 || rc=3
				fi
	
				echo "backing up disklabel for ${j}"
				disklabel /dev/${j} > "${bak}/$(echo "disklabel.${j}.bak"|sed -e "s/\//\_/g")" 2>/dev/null || rc=3
			done
		done
    fi;;

    *)  rc=0;;
esac

exit $rc

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