Backup on USB

How can i backup the whole solaris system to a usb.
I have already mounted the usb:
/dev/dsk/c2t0d0s2 15G 3.5G 11G 24% /dns_backup

Is there a specific command to backup or do i have to manually copy all the files to the usb.
I will use the backup to restore the system after doing hardware raid.

You can use flar for a "flash archive". It is meant for this purpose.

Here is the flar docset: http://docs.oracle.com/cd/E19253-01/817-5668/index.html