0TS2094 | Ultrastar DC ZN540

Model: 0TS2094
Capacity: 1TB
Interface: PCIe Gen 3.0 x4 (NVMe 1.3c)
Protocol: NVMe Zoned Namespace (ZNS)
Compatibility: Enterprise servers with U.2 NVMe
Dimensions: 100.45 x 69.85 x 15 mm
Weight: ~150 g

Description
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Ultrastar DC ZN540

Optimized Zoned Storage

The Western Digital Ultrastar DC ZN540 (0TS2094) is a 1TB NVMe SSD with Zoned Namespace (ZNS) technology, designed for cloud and enterprise data centers. It uses the NVMe ZNS command set to enable sequential data placement, reducing write amplification and improving efficiency for multi-tenant environments.

High Performance and QoS

With a dual-port NVMe 1.3c-compliant controller and PCIe Gen 3.0 x4 interface, the ZN540 delivers up to 4x higher throughput and 2.5x lower latency compared to conventional SSDs, achieving up to 65% lower tail latencies for enhanced Quality of Service (QoS) in applications like RocksDB and MySQL.

Enhanced Efficiency and TCO

By eliminating garbage collection and requiring minimal overprovisioning (as low as 10% vs. 28% for traditional SSDs), the ZN540 maximizes drive utilization and reduces total cost of ownership (TCO). It’s ideal for AI, machine learning, and persistent key-value storage in data centers.

Western Digital Ultrastar DC ZN540 0TS2094: All Features

Capacity	1TB
Interface	PCIe Gen 3.0 x4 (NVMe 1.3c, dual-port)
Protocol	NVMe Zoned Namespace (ZNS) Command Set 1.0
Performance	Up to 4x throughput, 2.5x lower latency vs. conventional SSDs
Endurance	0.8 DWPD (Drive Writes Per Day) for 5 years
Compatibility	Enterprise servers with U.2 NVMe support

Western Digital Ultrastar DC ZN540 0TS2094: All Specifications

Model	0TS2094
Capacity	1TB (also available in 2TB, 4TB, 8TB)
Interface	PCIe Gen 3.0 x4 (NVMe 1.3c, dual-port)
Form Factor	U.2 2.5” (15mm)
NAND Type	96-layer 3D TLC NAND
Sequential Read Performance	Not specified (varies by workload)
Sequential Write Performance	Not specified (varies by workload)
Random Read/Write IOPS	Not specified
Endurance	0.8 DWPD (based on 4KiB random write, JESD219 workloads)
MTBF	2.5 million hours (projected)
Power Consumption	Not specified (typical for U.2 NVMe SSDs: ~12W active, ~5W idle)
Operating Temperature	0°C to 70°C
Non-Operating Temperature	-40°C to 85°C
Dimensions (LxWxH)	100.45 x 69.85 x 15 mm
Weight	~150 g (estimated, based on similar U.2 SSDs)
Security	Instant Secure Erase (ISE)
System Compatibility	Enterprise servers with U.2 NVMe slots
Certifications	FCC, CE, RoHS (estimated, based on Western Digital standards)
Warranty	5-year limited warranty
Package Contents	SSD, quick start guide