Reference Guide

Table Of Contents
Figure 21. Expanding the Azure Stack HCI cluster
Azure Stack HCI node expansion
In an HCI cluster, adding server nodes increases the storage capacity, improves the overall storage performance of the cluster,
and provides more compute resources to add VMs. Before adding new server nodes to an HCI cluster, complete the following
requirements:
Verify that the processor model, HBA, and NICs are of the same configuration as the current nodes on the cluster and PCIe
slots.
Ensure that all disk types and the amount in each node are the same as the node in use. Do not combine two different disk
types in the same cluster or node. For example, you cannot combine SATA and SAS HDD/SSD drives in the same node or
cluster. The following table shows the supported options for expanding storage capacity of the cluster.
Table 2. Options to expand storage capacity of the cluster
Option 1 conditions Option 2 conditions
Drive is listed in the Support Matrix
Same drive manufacturer
Same capacity and endurance
Latest model
Latest firmware
Drive is listed in the Support Matrix
Different drive manufacturer
Same capacity and endurance
Different model
Different firmware
Ensure that the BIOS, drivers, firmware, and chipset are as listed in the support matrix.
Apply the BIOS configuration to the node and configure iDRAC. For more information about configuring the node, see the
Dell EMC HCI Solutions for Microsoft Windows Server Deployment Guide. Do not run the PowerShell commands in the
following sections of the deployment guide again because the cluster is already created, Storage Spaces Direct is already
enabled, and the management network is already excluded:
Creating the host cluster
Enabling Storage Spaces Direct
Configuring the host management network as a lower priority network for live migration
Ensure that the following tasks are completed:
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Day 0 Operations