I have an MD3460 connected to two servers equipped with 6 Gbps SAS HBAs, with one SAS link per controller per server. (Total of four links) The servers run Redhat 7 with multipath configured.
For some reason, three of the four SAS links get reported as "degraded" in the RAID Controller module on the MD3460 array. Also, the virtual disks have a tendency to fail over to the non-preferred path all the time. Some move from controller 1 to controller 0, and some move the other way. Even so, both servers can access all LUNs on both controllers, so nothing actually seems to be in a non working state.
What could be the reason for the "degraded" status of the ports, and is it probable that the "degraded" port status is behind the virtual disk controller failovers?
Firmware version is 08:25:08:60
/Andreas