the Thinksystem S4520 Mixed Use Sata Ssds Are Advanced Data Center Ssds Optimized For Mixed Read-write Performance, Endurance And Strong Data Protection. Compared With The Intel S4610 Series, These New Drives Offer Improved Endurance. The S4620 Ssds With Up To 5 Full Drives Writes Per Day (dwd) Are An Excellent Choice As Cache In Transactional Application And High-speed Storage For Enterprise Databases.