A customer's business needs 247 uptime and highest data availability. In the past, the customer has experienced revenue loss from several outrages during firmware upgrade processes with non-HPE products due to temporary loss of access to disk enclosures. There is a need for 80 TB of Tier-0 storage.
You propose cage availability in the new design, using an HPE 3PAR StoreServ 2-node system containing
80.92 TB cMLC SSD drivers.

When following HPE best practices, how many additional enclosures should be included in the system?