Mirroring the root disk of already installed machine

Fri Sep 8 00:03:42 PDT 2006

	Hi hackers,

	i have a machine running FreeBSD 5.4 . It has 2 HDDs. Recently the non-root HDD failed and lost all the data on it. Since the machine is working 24/7 i want to mirror its root disk (this one with the OS on it) in order to prevent a severe downtime and data loss.

	Is there a safe way to do the above using gmirror ?

	Thanks in advance!

		Vlady