WD Re datacenter hard drives offer up to 4TB capacities and are available with SAS or SATA interface. With the highest error tolerance and MTBF of any capacity optimized drive, WD Re delivers the durability and 24x7 reliability required in tightly packed vibration prone multi drive systems. The combination of high capacity, peak performance and robust design make WD Re drives ideal for heavy workload environments, cloud storage, RAID arrays, external storage arrays, data warehousing and mining applications. WD puts our datacenter products through extensive Functional Integrity Testing (F.I.T) prior to any product launch. This testing ensures our products consistently meet the high quality and reliability standards of the WD brand. Following a FIT test the Enterprise System Group (ESG) testing validates interoperability with HBAs, operating systems and drivers to ensure an even greater level of quality, reliability and peace of mind. WD also has a detailed Knowledge Base with helpful articles and software utilities. Our customer support lines have longer operational hours to ensure you get the help you need when you need it. Our no cost customer support lines are here to help or you can access our WD Support site for additional details.