Samsung MZQL21T9HCJR-00AD3 1.92TB PM9A3 NVMe PCIe Gen4 x4 2.5 inch Enterprise Solid State Drive

General

Brand	Samsung
Model	PM9A3
Capacity	1.92TB
Usage Class	Enterprise

Interface

Host Interface	NVMe PCIe Gen4 x4
Total Interface Bandwidth	64 Gb/s

Physical Dimension

Form Factor	2.5

Flash & Endurance

NAND Flash	Samsung V-NAND 6th Gen TLC
Drive Writes Per Day	1
Total Bytes Written	3504 TBW

Performance

Sequential Read	6800 MB/s
Sequential Write	2700 MB/s
Random Read IOPS	850000
Random Write IOPS	160000
Average Latency	85 μs

Reliability

Mean Time Between Failures	2 Million Hours
Uncorrectable Bit Error Rate	1.0×10⁻¹⁷
Power Loss Protection	Yes

Part Number

MPN	MZQLB1T9HAJR

Engineer's Note

Compared with the previous-generation MZQLB1T9HAJR, the PM9A3 MZQL21T9HCJR-00AD3 moves to a PCIe Gen4 x4 interface and Samsung 6th Gen V-NAND TLC, delivering up to 6,800 MB/s sequential read and 850,000 random-read IOPS for a clear step up in throughput and server consolidation efficiency. With 1.92TB capacity, 1 DWPD, and 3,504 TBW, it offers a stronger balance of endurance and performance than the prior generation for read-heavy to mixed enterprise workloads such as virtualization, scale-out storage, and high-density content delivery.

Endurance & Reliability

With an endurance rating of 3504 TBW and 1 DWPD, the MZQL21T9HCJR-00AD3 is designed to handle about one full drive write per day across its service life, which is more than sufficient for typical enterprise boot, OS, logging, and general application workloads. In practical terms, under common system-disk or read-heavy server usage, this level of endurance provides long-term peace of mind and can comfortably support many years of operation without the SSD wear becoming a concern. For enterprise reliability, built-in power loss protection (PLP) helps preserve in-flight data and metadata during an unexpected power interruption, reducing the risk of corruption and improving system recovery confidence. Its UBER of 1.0E-17 means an extremely low probability of unrecoverable bit errors during reads, supporting high data integrity expectations, while the 2 million-hour MTBF further reflects strong platform-level dependability.

Technical Specs & Insights

1. The NVMe over PCIe Gen4 x4 architecture provides the bandwidth and parallelism needed to keep virtualized databases, analytics clusters, and scale-out application nodes fed without host-side I/O bottlenecks.
2. Its strong sequential read performance accelerates bulk data access, reducing startup time for AI models, speeding large backup restores, and improving throughput for media and data-lake workloads.
3. The high random read capability enables fast response under heavily concurrent small-block access, making it well suited for OLTP databases, metadata-intensive platforms, and latency-sensitive cloud services.
4. A 1 DWPD endurance profile offers a balanced fit for mainstream enterprise deployments, supporting consistent daily write activity in mixed-use environments without overprovisioning for unnecessary endurance.
5. Samsung 6th Gen V-NAND TLC, paired with low typical latency, helps deliver predictable QoS and efficient flash density, which is valuable for read-optimized servers, high-density storage tiers, and business-critical application responsiveness.

Capacity Sweet

Reference capacities in the same series for MPN MZQL21T9HCJR-00AD3 (1.92TB): Lower capacity: 960GB Higher capacity: 3.84TB Capacity positioning analysis: At 1.92TB, this model sits in the sweet spot of the series. Compared with the 960GB version, it offers much better headroom for OS images, application growth, logging, and mixed workload consolidation, reducing early capacity pressure. Compared with the 3.84TB model, it preserves nearly the same enterprise-class sequential and random performance profile while achieving a more efficient cost-per-node and lower upfront budget. It is especially well suited for medium-scale virtualization clusters, such as supporting roughly 40 to 60 general-purpose virtual machines with balanced capacity and performance.

FAQ