Trouble getting SAS 8 bay expander to work at 6Gbps

[TechBoyJK]

I upgraded the raid controller on my server to an IBM M5015 (i have some previous threads).

It supports 6Gbps; and my expander should support 6Gbps (according to the manual and specs).

However, I noticed that the RAID controller has (2) 4 port SAS ports. The original raid controller had 1.

The SAS expander has a single MIN-sas port, which breaks off into two channels on the drive cage.

Because of this; the SAS cable going from the cage to the RAID card only plugs into 1 of the 2 4 channel ports.

Since I'm trying to put 8 channels down a single 4 lane SAS port, is that why my 6Gbps SAS drives are only seen as 3Gbps?

 

[Emulex]

No it sounds like it is having trouble negotiating sas @6gbps!

It should run 6x4=24gbps to the sas expander then 6xExpanded-ports to the drives. oversubscribing bandwidth!

Might want to upgrade the sas expander firmware? what model #/rev is the SAS expander?