Disk shelves are never connected to other ha pair s in the cluster.
Netapp sas cabling.
If you are using sas optical multimode om4 breakout cables with mini sas hd to lc connectors for patch panels the following.
Disk shelf cabling is always isolated within the ha pair that owns the disks.
Qsfp to qsfp sas cables are used to connect disk shelves together and to connect disk shelves to the sas ports on the controller.
The sas cable connectors are keyed.
Having a control path that is separate from the data path increases reliability and simplifies troubleshooting.
The sas cabling rules regarding controller slot numbering rules shelf to shelf connection rules and controller to stack connection rules described in this guide are the same rules that apply to all sas disk shelves whether they have iom12 iom6 or iom3 modules.
Two types of controllers and two types of disk shelves are used in these examples.
However the information in this guide is specific to the unique characteristics of disk shelves with iom12 modules and.
For disk shelves you insert a sas cable connector with the pull tab oriented down on the underside of the connector.
The alternate control path acp uses the acp ports on the disk shelves to connect to the storage controllers.
Netapp disk shelf cabling examples.