FreeBSD bare metal restore (GPT, ZFS)

# Google translation from http://victor-sudakov.livejournal.com/328562.html
# Here so I will find it again

FreeBSD bare metal restore (GPT, ZFS raidz)

        victor_sudakov 
        November 8th, 2015 

    1. Full dump

    zfs snapshot -r zroot @ backup
    zfs send -R zroot @ backup> /mnt/backup.zfs
    zfs destroy -r zroot @ backup

    2. Bare metal restore to ZFS

    Loads with mfsBSD or the LiveCD, and further drives da3 - untagged where to deploy the system.

    gpart create -s gpt da3
    gpart add -s512k -t freebsd-boot da3
    gpart add -s2G -t freebsd-swap -l swap0 da3
    gpart add -t freebsd-zfs -l disk0 da3
    gpart bootcode -b / boot / pmbr -p / boot / gptzfsboot -i 1 da3


    Repeat for da4, if the system is in the mirror, or da4, da5, if raidz. The preferred use of the mark (-l), but not the names of the physical device, or when you change the hardware configuration "bukovki go" and pool will UNAVAIL. Swap partition is also more convenient to connect on labels.

    zpool destroy zroot
    zpool create zroot mirror / dev / gpt / disk {0,1}
    or
    zpool create zroot raidz / dev / gpt / disk {0,1,2}
    zfs receive -Fdv zroot </mnt/backup.zfs
    zpool set bootfs = zroot / ROOT / default zroot
    reboot

    On the restored system:
    zfs destroy -r zroot @ backup

    If it is a clone, do not forget
    rm / etc / hostid / etc / ssh / * key *

    Thanks for some tips here , in particular the need to specify the drives in the zpool in the form of labels in the / dev / gpt, rather than the physical device names. In particular swap point fstab like this:

      # Device Mountpoint FStype Options Dump Pass #
     / Dev / gpt / swap0 none swap sw 0 0
     / Dev / gpt / swap1 none swap sw 0 0
     / Dev / gpt / swap2 none swap sw 0 0