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Gen6 nodes intended to expand an existing cluster can be purchased as a half-chassis. A half-chassis has only two of its four nodes populated. The other two sets of compute module and drive sled bays are empty and available for future expansion. These empty bays have filler panels to prevent dust accumulation and ensure proper airflow through the chassis. If the node is upgraded to a full chassis later, the filler panels are removed. The empty compute module and drive sled bays are populated with two more nodes. Half-chassis are configured with the two nodes installed in the leftmost and center left bay sets of the chassis as seen from the front (node bays 1 and 2). The two bays on the right-hand side node and drive sled bays (node bays 3 and 4) have filler panels. If the nodes are moved to the two right-hand bay, the drive sled filler panels cannot be moved to the left-hand drive sled bays: T hey do not fit into these bays .
The filler panels for slots 3 and 4 are designed differently than the ones used in slots 1 and 2. This is by design, and they are not meant to be interchangeable.
A Gen6 half-chassis should be left in its factory configuration (left side populated, right side empty). The right-hand bays should only be used if they add additional nodes. There is no workaround allowing the filler panels to fit into the left hand drive sled bays. If the half chassis has been reconfigured to a 'nodes-on-the-right' configuration, it should be restored to its original configuration. The filler panels must be reinstalled into the right side drive sled bays to prevent issues caused by dust accumulation, and potential cooling related issues.
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