Which PERC9 series card does not include a battery backup unit (BBU)?

The PERC H330 is designed as an entry-level RAID controller, and it does not include a battery backup unit (BBU). This model is targeted for systems requiring basic RAID functionality without the need for advanced features such as BBU, which is used for maintaining cached data during power loss.

In contrast, other models such as the PERC H730, PERC H710, and PERC H920 are designed for more demanding environments. These RAID controllers typically offer additional features and performance capabilities, which include the integration of a BBU. The presence of a BBU is crucial for protecting cached data in high-performance and enterprise-level configurations, where data integrity during unforeseen power outages is critical.

The distinction of the PERC H330 as lacking a BBU underscores its focus on cost-saving while still providing essential RAID functionality, making it suitable for less demanding applications.