ZFS Rollback

List existing snapshots for given dataset

1

$ zfs list -t snapshot | grep tank/home/user

Recursively rollback dataset

1

$ zfs rollback -r tank/home/user@snapshotname

Mount zvol

Trivial if /dev/zdXpY exists

1

$ sudo mount /dev/zdxpY /mnt/tmp

If only /dev/zdX exists use

1

$ fdisk -l /dev/zdX

to find out the start sector of the respective partition and use the offset option to mount the partition

1

$ sudo mount -o offset=1048576 /dev/zdX /mnt/tmp