On Tuesday 02 January 2007 17:01, Mike McCarty wrote: > This guy has a server, which he needs to move. He wants to make a > clone of the disc, so as not to run the risk of damaging his only > good disc. > > > al primero que tenga una imagen del mismo y hacer backups diarios > > para tenerlos sincronizados: en caso de que se rompa el primer > > disco tengo la opcion de colocar el segundo como primario y listo. > > It isn't clear if he wants an exact image. He's saying he wants to > make daily backups to the new disc.
Over Christmas I had to upgrade my wife's computer from Windows 98 to Windows XP. Before starting I knew I was going to move partitions around and wasn't sure if the upgrade would loose any other data. So I booted a system rescue cd (see http://www.sysresccd.org/Main_Page), loaded up a firewire external drive (I bought the enclosure and put an old 20G drive in it) and then used dd if=/dev/hda of=/dev/sda bs=512 to do a bit copy of the whole drive. I had to restore a couple of times (moving partitions which have a boot sector pointing to them does not work well), and did the same thing in reverse. Worked great. I use RAID1 to provide immediate backup of data, and then overnight run cron jobs which backup specific areas (and archive stuff to a sliding daily archive) You can use the technique below (cp -alf) to keep daily snapshots and merge into a weekly one. I also do the same to merge weekly into monthly (in a weekly cron job) and monthly into long term archives (in a monthly cron job) --------------------------------------- #!/bin/sh logger -t "Backup:" "Daily backup started" ARCH=/bak/archive if [ -d $ARCH/daily.6 ] ; then if [ ! -d $ARCH/weekly.1 ] ; then mkdir -p $ARCH/weekly.1 ; fi # Now merge in stuff here with what might already be there using hard links cp -alf $ARCH/daily.6/* $ARCH/weekly.1 # Finally loose the rest rm -rf $ARCH/daily.6 ; fi # Shift along snapshots if [ -d $ARCH/daily.5 ] ; then mv $ARCH/daily.5 $ARCH/daily.6 ; fi if [ -d $ARCH/daily.4 ] ; then mv $ARCH/daily.4 $ARCH/daily.5 ; fi if [ -d $ARCH/daily.3 ] ; then mv $ARCH/daily.3 $ARCH/daily.4 ; fi if [ -d $ARCH/daily.2 ] ; then mv $ARCH/daily.2 $ARCH/daily.3 ; fi if [ -d $ARCH/daily.1 ] ; then mv $ARCH/daily.1 $ARCH/daily.2 ; fi if [ -d $ARCH/snap ] ; then mv $ARCH/snap $ARCH/daily.1 ; fi # Collect new snapshot archive stuff doing daily backup on the way mkdir -p $ARCH/snap ------------------------ I backup this machine to another creating archives of the data using a rsync - like this rsync -aHxq --delete --backup --backup-dir=/archive/mydocs/ /home/alan/mydocs/ roo::alan/mydocs/ (Note this creates the archive on the other machine (within the module references as "alan" by the rsyncd.conf on that other machine - despite appearing to be added to root ) AND then I recover the archive (but you could just backup there) into the snap directory with rsync with commands like the following logger -t "Backup:" "Recover archive stuff" rm -rf /bak/empty mkdir /bak/empty #if we have an error at this stage it is better to exit rather than risk loosing some archive set -e rsync -aHq roo::alan/archive/ $ARCH/snap/ rsync -axq --delete /bak/empty/ roo::alan/archive/ -- Alan Chandler http://www.chandlerfamily.org.uk -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
