HA cabling considerations

There are different types of cables to consider with high availability.

Correct cabling is one of the most important aspects of planning for a multi-initiator and HA configuration. For RAID configurations with disk expansion drawers, using X cables provides the redundancy of two wide SAS ports between each controller and the disk expansion drawer, along with two narrow SAS ports for each disk drive. For RAID configurations with internal SAS disk slots, using YR cables provides the redundancy of two narrow SAS ports between each controller and the internal disk enclosure, along with two narrow SAS ports for each disk drive. For JBOD configurations, using AE cables provides one wide SAS port between each controller and the disk expansion drawer, along with one narrow SAS port for each disk drive. Thus there is better SAS fabric redundancy for RAID configurations versus JBOD configurations.