Installation FAS 2750 without mini SAS cables in switchless mode

[Jaanlp]

Hi,

Recently I will install a Fas 2750 in switchless mode without any disk shelf, the equipment does not include mini SAS cables for connection between controllers.

My question is about whether there will be any effect on failover performance, if a controller fails?

[Masters]

i think that you need to read more, you are always successfully

[aborzenkov]

It should not have any effect on failover (performance). There will be one path to internal disks from each controller, but I find it acceptable given that all connections are via fixed backplane.

[WDaniel]

FAS2750 models have internal storage so in order for them to share disks this loop is necessary. They use storage cables which are slightly different from mini SAS.

Cluster Interconnect cables
Part number X6566B-05-R6 (112-00297) or X6566B-2-R6 (112-00299). You can reference the install manual for this specs. The backplane connection is solely for HA connection, not a cluster connection. 

[BradenP]

It should not affect the failover of the nodes since there is an internal connection for both the nodes to the disks. That being said, it would be best if you cabled them together like the links below suggest since this will give you two paths to the disks (multipath HA). 

Setup instructions (also lists the part numbers for the cables in stage 1)

https://library.netapp.com/ecm/ecm_download_file/ECMLP2842666

Detailed doc guide

https://docs.netapp.com/us-en/ontap-systems/fas2700/install-detailed-guide.html#step-1-prepare-for-installation