A customer's business needs 24x7 uptime and highest data availability in the past, the customer has experienced revenue loss from several outage during firmware upgrade processes with non-HPE…

A customer's business needs 24x7 uptime and highest data availability in the past, the customer has experienced revenue loss from several outage during firmware upgrade processes with non-HPE products due to temporary loss of access to disk enclosures. There is need for 80 TB of Tier-O storage. You propose cage availability in the new design using HPE best practices, how many additional enclosures should be included in the system?