The HPE Smart Array P440ar Controller is a Flexible Smart Array, 12Gb/s SAS RAID controller that provides enterprise-class storage performance, increased internal scalability with SAS Expander Card, and data protection for specific HPE ProLiant Gen9 rack and tower servers. It features eight internal physical links and delivers increased server uptime by providing advanced storage functionality, including online RAID level migration between any RAID levels with flash backed write cache (FBWC), global online spare, and pre-failure warning. The Gen9 family of controllers supports the HPE Smart Storage Battery. With HPE Smart Storage Battery, multiple Smart Array controllers are supported without needing additional backup power sources for each controller, resulting in simple upgrade process.

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Ports	Internal: 8 SAS/SATA physical links across 2 x4 ports
Performance	12Gb/s SAS (1200 MB/s theoretical bandwidth per physical lane) 6Gb/s SATA (600 MB/s theoretical bandwidth per physical lane) PCI Express Gen3 x8 link width 2 GiBytes 72-bit wide DDR3-1866 Flash Back Write Cache provides up to 14.9GB/s maximum cache bandwidth Read ahead caching Write-back caching
Online Management Features	Online array expansion Online capacity expansion Online logical drive extension Online RAID level migration Online stripe size migration Online mirror split, recombine, and rollback Online active drive replacement Online drive firmware upgrade Online and high performance offline Rapid Parity Initialization (RPI) Unlimited global online spares assignment User selectable expand and rebuild priority User selectable RAID level and stripe size User selectable read and write cache sizes Supports Predictive Spare Activation