I try to write a wiki about to recover or clone a full ZFS snapshot on a virtual machine by use of SSHd So I want to clone a physical, production server as virtual machine. (to use as development server.) But I can not boot the destination server, probably because the IDE drives are named differently in the legacy part of the snapshot of the zpool. How can I fix that ? Setup. The physical server does run root on ZFS v14 (freeBSD 8.1). it is full zfs based with a raidz1 mirror. Code:#gpart show => 34 976773101 ad4 GPT (466G) 34 128 1 freebsd-boot (64K) 162 16777216 2 freebsd-swap (8.0G) 16777378 959995757 3 freebsd-zfs (458G) => 34 976773101 ad5 GPT (466G) 34 128 1 freebsd-boot (64K) 162 16777216 2 freebsd-swap (8.0G) 16777378 959995757 3 freebsd-zfs (458G) => 34 976773101 ad6 GPT (466G) 34 128 1 freebsd-boot (64K) 162 16777216 2 freebsd-swap (8.0G) 16777378 959995757 3 freebsd-zfs (458G) note: 3x IDE drives, named ad4, ad5, ad6 The zpool contains a legacy part and subdirs: Code:#zfs list NAME USED AVAIL REFER MOUNTPOINT zroot 12.3G 885G 521M legacy zroot/tmp 4.23G 885G 4.23G /tmp zroot/usr 5.66G 885G 1.56G /usr zroot/usr/home 2.52G 885G 2.51G /usr/home zroot/usr/ports 1.27G 885G 1.04G /usr/ports zroot/usr/ports/distfiles 241M 885G 241M /usr/ports/distfiles zroot/usr/ports/packages 24.0K 885G 24.0K /usr/ports/packages zroot/usr/src 315M 885G 315M /usr/src zroot/var 1.91G 885G 235K /var zroot/var/crash 26.0K 885G 26.0K /var/crash zroot/var/db 1.91G 885G 1.91G /var/db zroot/var/db/pkg 2.43M 885G 2.43M /var/db/pkg zroot/var/empty 24.0K 885G 24.0K /var/empty zroot/var/log 278K 885G 226K /var/log zroot/var/mail 99.2K 885G 69.3K /var/mail zroot/var/run 114K 885G 79.3K /var/run zroot/var/tmp 33.3K 885G 33.3K /var/tmp So I made a snapshot of the source system: Code:zfs snapshot -r zroot@20110319 On the destination machine, I did setup a virtual machine with 3 IDE disks, unfortionally they are ad0, ad1 and ad3 (!) I did boot from the FreeBSD dvd, but did exit to the loader (option 6), using commands: Code:load ahci load geom_mirror load zfs boot Now the kernel is aware of the ZFS system. And I did enter FIXIT mode from sysinstall. I did partition the destination system. Code:#gpart show => 34 976852925 da0 GPT (466G) 34 128 1 freebsd-boot (64K) 162 16777216 2 freebsd-swap (8.0G) 16777378 970075581 3 freebsd-zfs (458G) ... Wrote bootcodes: Code:gpart bootcode -b /mnt2/boot/pmbr -p /mnt2/boot/gptzfsboot -i 1 da0 gpart bootcode -b /mnt2/boot/pmbr -p /mnt2/boot/gptzfsboot -i 1 da1 gpart bootcode -b /mnt2/boot/pmbr -p /mnt2/boot/gptzfsboot -i 1 da3 And I did setup raidz1: Code:mkdir /boot/zfs zpool create zroot raidz1 /dev/gpt/disk0 /dev/gpt/disk1 /dev/gpt/disk2 zpool set bootfs=zroot zroot Afterwards, I did setup SSHd in FIXIT mode. It did run. From the source server, I did send the snapshot to the destination server (192.168.1.8) with: Code:zfs send -R zroot@20110319 | ssh email@example.com 'zfs recv -vFd zroot' note: I could export the snapshot to a file, then send it over too. But this was one step. Good so far. All did transfer, and I see the zpool on the destination server. I did some commands to prepare to boot the destination server: Code:zfs unmount -a zfs set mountpoint=legacy zroot zfs set mountpoint=/tmp zroot/tmp zfs set mountpoint=/usr zroot/usr zfs set mountpoint=/var zroot/var And I did reboot the destination system. The system seems to boot, kernel loads, zfs, geom, but it halts with a ROOT MOUNT ERROR the loader variables are: Code:vfs.root.mountfrom=zfs:zroot using the ? I do see some geom managed disks, so ad0, ad1, ad3 (ad0p1, ad0p2, ad0p3, ...) So what did I miss in my setup to boot. Or do I need to tweak the setup to manage the new hardware or do I need to change the legacy part ? thanks.