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From: Ivan Voras <ivoras@freebsd.org>
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Subject: Re: Can FreeBSD handle redundant SAS controllers?
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On 07/09/2012 16:53, Andy Young wrote:
> I'm having trouble finding information about this on the web. I have a =
SAS
> backplane with redundant expanders designed so you can use redundant SA=
S
> controllers. Seems obvious to me that the drivers need to support two c=
ards
> pointing to the same drives. Does this work in FreeBSD? Does it matter
> which HBAs I buy?

The closest thing to what you want is gmultipath:

http://www.freebsd.org/cgi/man.cgi?gmultipath


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