Which combination of trays allows a HCP S31 to be configured to its maximum capacity?

An HCP S31 node is architected with a single 4U100 server chassis, which functions as the primary controller. To scale capacity, this controller node connects to high-density 4U106 storage expansion trays. The maximum supported configuration for a single HCP S31 node is one 4U100 server connected to eight 4U106 storage trays. This 1+8 configuration provides the highest raw storage capacity available for this specific model, leveraging the full expansion capabilities of the S31 controller.

A. An HCP S31 node consists of only one 4U100 controller, not two. The 4U106 is the expansion tray, not the primary server.

C. This is a valid configuration, but it does not represent the maximum capacity, as an S31 node can support up to eight expansion trays.

D. This is the minimum expanded configuration, not the maximum. It represents a valid setup but with the lowest possible expansion capacity.

1. Hitachi Vantara, Hitachi Content Platform S-Series Node Hardware Reference, MK-92HCP035-12, May 2021.

Page 14, Section: "HCP S31 node": "An S31 node consists of one S31 server and from one to eight S31 storage trays." This section explicitly states the 1+8 maximum configuration.

Page 15, Table 2 "HCP S31 node specifications": This table details the components, identifying the "Server" as the 4U100 model and the "Storage tray" as the 4U106 model.

2. Hitachi Vantara, Hitachi Content Platform (HCP) S Series Datasheet, DS-573-D, March 2021.

Page 2, Table "HCP S Series Specifications", Row "Max Expansion Trays per Node": For the S31 model, this row specifies a value of "8", confirming the maximum number of expansion units. The table also identifies the S31 server as a 4U, 100-drive chassis and the expansion tray as a 4U, 106-drive chassis.