Sub: 749798??001 A RAID controller allows your computer to treat an array of drives as a single logical unit, speeding up data storage and providing redundancy in case one drive fails. The HPE 726825??B21 RAID Controller (749798??001) (a Smart array P441) is built to manage up to 200 physical SAS/SATA drives (64 logical) over dual x4 internal Mini??SAS HD ports (SFF??8614). It connects to your Gen9 ProLiant Rack/Tower Server via its high-speed PCI Express Gen3?x8 connection and ensures speedy storage with its generous 4?GiB FBWC cache. This HPE 726825??B21 RAID Controller has been refurbished, tested for complete functionality by our expert in-house Certified Technician, and is ready to ship today! Purchase with confidence, as the photos above represent the exact quality of your items, and come bundled with our 90 Day Warranty. *Please note, we have additional Refurbished HPE Server RAID Controllers in stock; feel free to send a message and we will update the quantity to suit your specific needs.* Thank you for choosing AltaTech for all of your lightning-fast IT needs!