With the netapps, they have two IOM6 modules. I currently have an HBA that is connected to the top module's "square" marked QSFP+ port (I think that's the cable, my memory can't remember everything, lol). That's the only cable I have hooked to the whole thing. 

 

Should I then connect the top module's "circle" port to the bottom modules "square" port? If so, will this increase write speed to the array/disks (pooled devices, not in the unraid array)? Or is this more of a redundancy thing? or none of the above.

Edited September 7, 20214 yr by live4soccer7

AFAIK you would only connect the second module to a second HBA, speed would be the same, it's for redundancy, but Unraid doesn't support SAS multipath.

That what I had originally thought as well, but had read a thread somewhere saying someone connected the two IOM6 modules. There were no details or additional information, so he/she may definitely be wrong. Figured I would look into it and see if anyone knew or if I could find supporting documentation. 

 

@JorgeB Thanks for always answering pretty much all my questions lately. I've just been doing a lot of restructuring and updating decade old equipment from when I first got started with unraid.

And forgot to mention, I believe connecting one IOM to another is an invalid configuration, the out port is for daisy chainning to another shelf, e.g.:

 

Yeah, there are many different ways you can configure them. I looked at the photos/configs when I initially got the unit and didn't see anything referencing connecting the two IOM modules on the same shelf together.