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Omega Backup / Restore Instructions revisited

  • Re: Omega Backup / Restore Instructions

    I decided I needed to be able to backup my 4 (and counting!) Omega2 and Omega2+ devices, ideally to one place using the instructions in the aforementioned post.

    I erased a spare USB stick under Linux and created 4 primary partitions, each the same size. I labelled each partition with the relevant 4 characters of the MAC address (shown obfuscated here).

    On each Onion I then created the /mnt/backup directory before running /root/backup.sh as shown below.

    # backup.sh
    # From: https://community.onion.io/topic/2677/omega-backup-restore-instructions
    # My machines use /dev/sdb - YMMV !
    # get the machine name
    MACHINE=`/bin/uname -n`
    # get today's date
    TODAY=`date +%Y-%m-%d`
    # which  machine am I on?
    if [ $MACHINE = Omega-0001 ]; then
       mount /dev/sdb1 /mnt/backup
    elif [ $MACHINE = Omega-0002 ]; then
       mount /dev/sdb2 /mnt/backup
    elif [ $MACHINE = Omega-0003 ]; then
       mount /dev/sdb3 /mnt/backup
    elif [ $MACHINE = Omega-0004 ]; then
       mount /dev/sdb4 /mnt/backup
       echo "machine $MACHINE unknown - exit"
    echo "Backing up $MACHINE"
    # final check, to be sure ...
    if [ -d /mnt/backup ]; then
       echo "backing up..."
       echo "NO BACKUP DEVICE found - exit"
    # standard MTDs
    dd if=/dev/mtd0 of=/mnt/backup/uboot.bin
    dd if=/dev/mtd1 of=/mnt/backup/ubootenv.bin
    dd if=/dev/mtd2 of=/mnt/backup/factory.bin
    dd if=/dev/mtd3 of=/mnt/backup/firmware.bin
    dd if=/dev/mtd4 of=/mnt/backup/kernel.bin
    dd if=/dev/mtd5 of=/mnt/backup/rootfs.bin
    dd if=/dev/mtd6 of=/mnt/backup/rootfsdata.bin
    # export UCI settings for good measure
    uci export > /mnt/backup/UCIexport_$TODAY
    echo "all done"

    Once the backup is complete on each machine you can then umount /mnt/backup and remove the USB stick.

    So looking at the finished 4 backups on another Linux box, the USB stick is mounted on /dev/sdC, here's a typical directory listing:

    ls -l /media/peter/0004-backup

    total 41056
    -rwxr-xr-x 1 peter peter     1086 Jul 10 13:41 backup.sh
    -rw-r--r-- 1 root  root     65536 Jul 10 13:38 factory.bin
    -rw-r--r-- 1 root  root  16449536 Jul 10 13:39 firmware.bin
    -rw-r--r-- 1 root  root   1341962 Jul 10 13:39 kernel.bin
    drwx------ 2 root  root     16384 Jul 10 13:08 lost+found
    -rw-r--r-- 1 root  root  15107574 Jul 10 13:39 rootfs.bin
    -rw-r--r-- 1 root  root   8781824 Jul 10 13:39 rootfsdata.bin
    -rw-r--r-- 1 root  root    196608 Jul 10 13:38 uboot.bin
    -rw-r--r-- 1 root  root     65536 Jul 10 13:38 ubootenv.bin
    -rw-r--r-- 1 root  root      6459 Jul 10 13:39 UCIexport_2019-07-10

    ... and free space:

    df -h /dev/sdc*

    Filesystem      Size  Used Avail Use% Mounted on
    udev            3.9G     0  3.9G   0% /dev
    /dev/sdc1       6.9G  120M  6.4G   2% /media/peter/0001-backup
    /dev/sdc2       6.9G  120M  6.4G   2% /media/peter/0002-backup
    /dev/sdc3       6.9G   72M  6.5G   2% /media/peter/0003-backup
    /dev/sdc4       6.9G   72M  6.5G   2% /media/peter/0004-backup

    As you can see, my USB stick is way too big and I'll see if I can find a smaller device instead.

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