[CentOS] LSI/3ware 9750-4i and multipath I/O

Sun Jan 15 00:52:17 UTC 2012
John R Pierce <pierce at hogranch.com>

On 01/14/12 3:55 PM, Vahan Yerkanian wrote:
> At the moment I have two 9750-4i installed, each having a sff8087 x4 cable going to the same backplane containing dual-port sas disks.
>
> This was supposed to be a load balanced, multi-controller failover setup.

AFAIK the only way to achieve that is to use plain SAS HBA's such as the 
LSI 2008 family (92xx cards), not raid controllers.

this is a representive SAS midplane manual
http://www.supermicro.com/manuals/other/BPN-SAS-936EL.pdf

it shows failover combinations starting on page 3-3...


-- 
john r pierce                            N 37, W 122
santa cruz ca                         mid-left coast