Kioxia (formerly called Toshiba Memory) said they are the first data centre PCIe v4.0 drives to ship. Kioxia began operations on November 1, 2019 and Western Digital has partnered with them for flash memory development. They are headquartered in Minato, Tokyo, Japan. Toshiba still owns 42.1% of the company.

kioxia cm6_nov._2019

The company has also bought Light-On for $165 million which brings consumer oriented SSD products to the portfolio.

The CD4 and CD6 are enterprise class flash drives, designed for data centre use. The CD4 is single-ported and the CM6 is dual-ported, and therefore faster. 

The CM6 reaches 30.72TB of capacity which is now the largest in the format.

The PCIe 4.0 bus delivers up to 64GB/sec, double PCIe 3.0 32GB/sec maximum.

The CD6 and CM6 come in mixed-use and read-intensive versions and are built from Kioxia’s BiCS 4 NAND – 96-layer 3D NAND formatted as TLC (3bits/cell). The read-intensive versions have higher capacities and lower endurance ratings as the mixed-use models have capacity set aside for over-provisioning. 

Both drives come in a U.2 (SFF-8639) format, meaning they will fit in tri-mode 2.5-inch drive bays. These support SATA, SAS and NVMe connectivity. The drives are self-encrypting to a FIPS standard.

The company said it will begin volume shipments early in 2020.