Samsung Releases 240GB And 800GB SZ985 Z-SSDs

Posted by at 12:05 pm on January 31, 2018

Samsung announced that it is shipping its new enterprise Z-SSDs, which come with a radical new flavor of existing NAND technology, in 800GB and 240GB capacity points.

Samsung designed the new Z-SSD to tkae on Intel and Micron’s 3D XPoint memory. However, 3D XPoint is a completely new type of memory that has only surfaced in Intel’s relatively expensive Optane products, while Samsung’s Z-SSD comes with Z-NAND, which is a heavily modified version of existing NAND technology. That should ostensibly provide faster performance than normal SSDs but at a lower price point.

Samsung SZ985 Z-NAND SSD Intel Optane (3D XPoint) Samsung PM1725a Intel DC P3700
Interface PCIe 3.0 x4 PCIe 3.0 x4 PCIe 3.0 x8 PCIe 3.0 x4
Media Z-NAND 3D XPoint 48-layer 3D TLC NAND 20nm MLC NAND
Sequential Read/Write (GB/s) 3.2 / 3.2 2.4 / 2 6.4 / 3 2.8 / 2
Random Read/Write IOPS 750,000 / 170,000 550,000 / 500,000 1,080,000* / 170,000 460,000 / 175,000
Random Read Latency 12 – 20µs 10µs 90µs 115µs
Random Write Latency (typ) 16µs 10µs 20µs 25µs
Drive Writes Per Day (DWPD) 30 30 5 17
Capacity 800GB 350  / 750GB 1.6 / 3.2 / 6.4TB 400 – 800GB / 1.6 – 2TB

Samsung hasn’t shared pricing for the new drives yet, but it will introduce them at the ISSCC 2018 (International Solid-State Circuits Conference), which will be held February 11-15 in San Francisco.

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