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Sandisk Debuts UltraQLC-Based 256TB NVMe Enterprise SSD

Sandisk plans to ship the drives in the U.2 form factor in early 2026, aiming to meet hyperscale AI data demands.

Western Digital
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Overview

  • The UltraQLC platform combines BiCS8 2Tb QLC NAND and custom multi-core controllers to double storage density without increasing die size and handle high throughput at scale.
  • Direct Write QLC technology removes SLC buffering and enables power-loss safe writes on the first pass.
  • Dynamic Frequency Scaling is projected to boost performance by up to 10 percent at a given power level.
  • A new data retention profile cuts drive recycle cycles by up to 33 percent, improving reliability and energy efficiency for data centers.
  • Both the 256TB model and a 128TB SN670 NVMe U.2 SSD are scheduled for release in early 2026 to support hyperscale AI and data-intensive workloads.