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 Dell VM02C RAID Controller (an H710) is built to manage up to 32 SAS or SATA-connected drives over 8 ports and 2 internal mini-SAS connections. It connects to your compatible device via its high-speed PCI Express 2.0?x8 connection and ensures speedy storage with its generous 512MB Non-Volatile (NV) cache. This Dell VM02C RAID Controller has been removed from a working unit (such as a Dell PowerEdge R720), tested for complete functionality by our expert in-house Dell-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 Dell 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!