On Wed, 11 Jul 2012, Kaya Saman wrote:

On Wed, Jul 11, 2012 at 10:18 AM, miles kuo <miles....@gmail.com> wrote:
Hi all,

I have two SAS disks for the FreeBSD install. I want to install the freeBSD
on one disk and mirror to another disk. Just like the AIX Mirror.

Any changes will sync between the two disks. And if  one disk crashed or
disconnected, the OS could continue running on another disk.

Does the FreeBSD support the disk mirror? How to implement it?

I am no expert at this however a quick Google search comes up with:

http://www.freebsd.org/doc/handbook/geom-mirror.html

The procedure shown there produces a mirror that will not boot on FreeBSD 9. The release notes mention a workaround:
http://www.freebsd.org/releases/9.0R/relnotes-detailed.html#AEN1277

(There's work under way to fix that chapter.)
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