HPE Cloud Bank Storage is designed to provide cost-optimized backups, long-term data retention, and operational simplicity. It is specifically tailored to lower costs associated with backup and storage while ensuring data is securely stored and easily retrievable over an extended period. Its seamless integration with HPE GreenLake solutions makes it the most suitable component to meet the customer's requirements.

HPE’s disaggregated hyperconverged infrastructure (dHCI) typically integrates compute, storage, and networking components. HPE Alletra 6000 array with iSCSI HBAs can be part of dHCI because iSCSI is a supported protocol. HPE Aruba switches are also relevant as they provide network connectivity, which is essential for dHCI. Lastly, HPE ProLiant DL servers offer the computing power needed. Fibre Channel (FC) is generally not supported in dHCI environments, so components relying on FC HBAs are excluded.

Compared to OCA (Oracle Cloud Applications), SSET (Sun Server Electricity Tool) typically requires more detailed information about the infrastructure to optimize server placement and power usage. A critical characteristic that is additionally required to configure a solution in SSET is the electrical load per rack, which is measured in kilowatt (KW). This information is crucial for ensuring that power distribution and cooling requirements are accurately met in the datacenter, thus 'KW per rack' is the correct additional datacenter characteristic needed.

The client needs a storage array that can connect to the ESXi host servers via 12Gbps SAS, which is a specific type of connectivity. Among the options provided, the HPE MSA 2062 is designed for departmental storage and supports SAS connectivity. Therefore, it is the suitable choice for this scenario.