The HP Smart Array P204i-c SR Gen10 Controller - supporting 12Gb/s SAS and PCIe 3.0 - is ideal for maximizing performance while supporting advanced RAID levels with 1 GB flash-backed write cache (FBWC). This controller operates in Mixed Mode which combines RAID and HBA operations simultaneously. It has four internal SAS lanes - allowing connection to SAS or SATA drives and provides enterprise-class storage performance - reliability - security and efficiency needed to address your evolving data storage needs. This controller offers enhanced security by encrypting data-at-rest on any drive with HP Smart Array SR Secure Encryption. 804424-B21