Data storage system with redundant internal networks

A data storage system comprising:

• a rack;
• a plurality of head nodes mounted in the rack;
• a plurality of data storage sleds mounted in the rack;
• and
• at least two networking devices mounted in the rack;
• wherein the at least two networking devices are configured to implement at least two redundant networks in the rack between the the head nodes and the data storage sleds;
• and
• wherein to implement the at least two redundant networks:
• each of the head nodes is coupled to each of the data storage sleds via a first one of the at least two networking devices;
• and
• each of the head nodes is coupled to each of the data storage sleds via a second one of the at least two network devices.

A head node for a data storage system, comprising:

• a log-based storage configured to store write data for a volume stored in the data storage system;
• and
• at least two redundant network interface cards,
• wherein respective ones of the at least two redundant network interface cards are configured to couple the head node to respective ones of at least two networking devices mounted in a same rack with the head node,
• wherein the head node is configured to:
• communicate with other head nodes mounted in the same rack with the head node via redundant networks implemented in the same rack with the head node that are implemented via the at least two networking devices coupled to the network interface cards of the head node;
• and
• communicative with data storage sleds mounted in the same rack with the head node via the redundant networks implemented in the same rack with the head node via the at least two networking devices coupled to the network interface cards of the head node.