Mpt raid 1 support?

[Jeroen Molinger]

Geoff Buckingham wrote:

>Should the mpt driver support the disk mirroring present in some forms
>of the controller? It seems to be similar to the ata mirroring in some
>chipsets, it provides INT13 level access to the mirror for boot blocks,
>but once the OS is running expects the driver to know about the mirror.
>
>On an IBM x345 with this functionality I break any mirror as soon as I
>boot FreeBSD. Could this be worked round with any of the ata mirror
>tools?
>
>
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I have it working with no problems. I create a mirror and hotspare with 
3 drives on a IBM X345