Western Digital's Ultrastar DCSN861 SSD Adopts FADU's Main Control Chip
TapTechNews August 16th news, an article published by the foreign media StorageReview on the 14th of this month local time shows that Western Digital has adopted the main control chip from the Korean company FADU in its first PCIe 5.0 solid-state drive, Ultrastar DCSN861.
According to the disassembly by foreign media, the U.2 and E1.S form factors of Western Digital's Ultrastar DCSN861 enterprise-class solid-state drive are both equipped with the FADU FC5161 main control. In addition, both forms of the DCSN861 are equipped with power loss protection capacitors.
Referring to previous reports by TapTechNews, the FADU FC5161 main control was released in 2021. This main control supports the NVMe 2.0 protocol and complies with the OCP 2.0 specification, and can be configured as a PCIe 5.0 × 4 single-port or 5.0 × 2 dual-port mode.
This main control has 16 flash memory channels and supports the ONFi flash memory interface protocol up to 2400 MT/s, and for external cache, it supports DDR4/5 DRAM with a 32-bit width. The FC5161 also supports advanced features such as ZNS partitioned namespace and FDB flexible data placement.
And Western Digital's Ultrastar DCSN861 enterprise-class solid-state drive currently has a maximum capacity of up to the 8 TB level, providing 1 DWPD and 3 DWPD durability levels on the U.2 specification, and only the 1 DWPD version on the E1.S.
The most powerful U.2 specification 3 DWPD 6.4 TB capacity model of the DCSN861 currently has a sequential read speed of up to 13700 MB/s, a sequential write speed of up to 7500 MB/s, a random read speed of up to 3300 KIOPS, and a random write speed of 800 KIOPS.
Foreign media said that there are some positioning differences between the U.2 and E1.S form factors of Western Digital's Ultrastar DCSN861 solid-state drive: the former is for high-performance enterprise workloads such as AI, while the latter has adjusted the performance for cloud service workloads.
According to the FADU official website news release, the company reached a cooperation with Western Digital in the development of the FDB flexible data placement technology on June 10th, 2024 local time.