Que coisa mais divertida:
root@squeeze:~# zfs snapshot squeeze-da0s1@daily.1 root@squeeze:/# rm -rf usr var etc root@squeeze:/# zfs rollback squeeze-da0s1@daily.1 zfs: error while loading shared libraries: libexpat.so.1: cannot open shared object file: No such file or directory root@squeeze:/# cd .zfs root@squeeze:/.zfs# cd snapshot/ root@squeeze:/.zfs/snapshot# cd daily.1/ root@squeeze:/.zfs/snapshot/daily.1# cp -r usr var etc / cp: cannot create special file `/var/run/log': Invalid argument root@squeeze:/.zfs/snapshot/daily.1# zfs rollback squeeze-da0s1@daily.1 root@squeeze:/.zfs/snapshot/daily.1# cd / root@squeeze:/# ls -lha total 39K drwxr-xr-x 20 root root 21 Dec 28 15:19 . drwxr-xr-x 20 root root 21 Dec 28 15:19 .. drwxr-xr-x 2 root root 91 Dec 28 10:32 bin drwxr-xr-x 4 root root 6 Dec 28 10:33 boot drwxr-xr-x 3 root root 3 Dec 28 17:03 data dr-xr-xr-x 5 root root 512 Dec 28 16:57 dev drwxr-xr-x 59 root root 139 Dec 28 16:58 etc drwxr-xr-x 3 root root 3 Dec 28 10:49 home drwxr-xr-x 9 root root 108 Dec 28 10:32 lib lrwxr-xr-x 1 root root 4 Dec 28 10:25 lib64 -> /lib drwsrwsrwt 3 root root 4 Dec 28 10:22 media drwxr-xr-x 2 root root 2 Nov 14 07:08 mnt drwxr-xr-x 2 root root 2 Dec 28 10:25 opt dr-xr-xr-x 1 root root 0 Dec 28 17:12 proc drwx------ 3 root root 6 Dec 28 15:20 root drwxr-xr-x 2 root root 114 Dec 28 10:49 sbin drwxr-xr-x 2 root root 2 Dec 28 10:25 srv dr-xr-xr-x 1 root root 0 Dec 28 17:12 sys drwxrwxrwt 2 root root 2 Dec 28 16:58 tmp drwxr-xr-x 10 root root 11 Dec 28 10:25 usr drwxr-xr-x 13 root root 13 Dec 28 10:25 var