The HPE Smart Array P441 Controller is a low- profile, PCIe3 x8, 12Gb/s Serial Attached SCSI (SAS) RAID controller that provides enterprise-class storage performance, increased external scalability, and data protection for select HPE ProLiant Gen9 rack and tower servers, and Apollo systems. It features eight external physical links and delivers increased server uptime by providing advanced storage functionality, including online RAID level migration (between any RAID levels) with flash back write cache (FBWC), global online spare, and pre-failure warning. This controller includes transportable FBWC allowing the data in the cache to be migrated to a new controller. 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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Key Features	Storage interface (SAS/SATA) -8 physical links across 2 x4 external ports -12Gb/s SAS, 6Gb/s SATA technology -Mix-and-match SAS and SATA drives to the same controller -Support for SAS tape drives, SAS tape autoloaders and SAS tape libraries 4 GiBytes Flash-Backed Write Cache (FBWC) PCI Express Gen3 x8 link RAID 0, 1, 10, 5, 50, 6, 60, 10 ADM (Advanced Data Mirroring) Legacy and UEFI boot operation Up to 200 physical drives Up to 64 logical drives Up to 8 daisy chained HPE D3600 Disk Enclosure and HPE D3700 Disk Enclosure in dual domain configuration HPE SmartCache (optional license) HPE Secure Encryption (optional license) FIPS 140-2 validation complete (certificate #2506) HPE SSD Smart Path VMware Virtual SAN certified Rapid Parity Initialization (RPI) Rapid rebuild Drive Erase Performance Optimization-Degraded Reads and Read Coalescing Power Efficiency Seamless upgrades to and from other HPE Smart Array controllers Recovery ROM to protect against controller ROM corruption Low-profile standard PCI Express plug-in card -Ships with a full size and a low profile bracket -Dimensions (excluding bracket): 7.5 in x 9.5 in x 2.25 in (19.05 cm x 24.13 cm x 5.72 cm)
Ports	External: 8 SAS/SATA physical links across 2 x4 port
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 4 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