This is the ZFS disk structure (half the drive acrually) of what Opensolaris
which I installed yesterday:
depaepe at opensolaris:~$ df -h
Filesystem Size Used Avail Use% Mounted on
rpool/ROOT/opensolaris
72G 2.3G 70G 4% /
swap 4.8G 744K 4.8G 1% /etc/svc/volatile
/usr/lib/libc/libc_hwcap1.so.1
72G 2.3G 70G 4% /lib/libc.so.1
swap 4.8G 8.0K 4.8G 1% /tmp
swap 4.8G 44K 4.8G 1% /var/run
rpool/ROOT/opensolaris/opt
70G 3.7M 70G 1% /opt
rpool/export 70G 19K 70G 1% /export
rpool/export/home 70G 18M 70G 1% /export/home
rpool 70G 55K 70G 1% /rpool
rpool/ROOT 70G 18K 70G 1% /rpool/ROOT
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