Stefan Mileschin

Western Digital has quietly added its new HGST Ultrastar DC SS530-series SSDs to its lineup of products. The new drives are aimed at mission-critical storage applications, such as financial transactions, e-commerce, virtualization, database analytics, etc. that use an SAS interface. The new SSDs carry up to 15.36 TB of user-accessible flash onboard and offer three endurance options to address read-intensive, mixed-use, as well as write-intensive workloads.

The Ultrastar DC SS530 is based on the same proprietary controller architecture as the previous-generation Ultrastar SS300 drives (i.e., the controller was presumably co-designed with Intel), but the new one is based exclusively for second-gen 3D TLC NAND, whereas previously the manufacturer used both 3D TLC and 3D MLC memory. Features of the controllers used for the DC SS530 and the SS300 are similar too and include an extended error correction code (ECC with a 1x10^-17 bit error rate) to enable higher performance and data integrity, exclusive-OR (XOR) parity (in case a whole NAND die fails) as well as parity-checked internal data paths. Besides, the new DC SS530 complies with the T10 Data Integrity Field (DIF) standard, which requires all interconnect buses to have parity protection (on the system level), as well as a special power loss data management feature that does not use supercapacitors.

https://www.anandtech.com/show/13149...tb-sas-12-gbps