Samsung MZTL21T9HCJR-00A07 1.92 TB PM9A3 PCIe Gen4 x4 E1.S Read Intensive Solid State Drive

General

Brand	Samsung
Model	PM9A3
Capacity	1.92 TB
Usage Class	Read Intensive

Interface

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

Physical Dimension

Form Factor	E1.S

Flash & Endurance

NAND Flash	Samsung V-NAND 6th-Gen 128-layer 3D TLC
Drive Writes Per Day	1
Total Bytes Written	3504 TBW

Performance

Sequential Read	6800 MB/s
Sequential Write	2400 MB/s
Random Read IOPS	850000
Random Write IOPS	115000
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	MZTL21T9HCJR-00007

Engineer's Note

Compared with the earlier MZTL21T9HCJR-00007, the MZTL21T9HCJR-00A07 is the later PM9A3 revision, leveraging Samsung 6th-Gen 128-layer V-NAND to deliver up to 6,800 MB/s sequential read and 850,000 random-read IOPS for faster response in read-intensive virtualized and scale-out server workloads. At 1.92 TB with 1 DWPD and 3,504 TBW, it offers a stronger balance of PCIe Gen4 bandwidth, enterprise endurance, and deployment density than typical mainstream TLC SSDs in the same class, making it a solid fit for cloud boot volumes, content-serving tiers, and mixed read/write infrastructure nodes.

Endurance & Reliability

With an endurance rating of 3504 TBW and 1 DWPD, the MZTL21T9HCJR-00A07 is designed to handle one full drive write per day across its warranty life, which is well aligned with typical enterprise boot, read-intensive, and mixed-use workloads. In practical terms, for common system-disk or infrastructure applications, this level of endurance provides ample write headroom for long-term, worry-free operation and reduces concern about premature wear under normal deployment conditions. This drive also includes enterprise-grade reliability features such as Power Loss Protection (PLP), which helps preserve in-flight data and metadata integrity if power is unexpectedly interrupted. Its UBER rating of 1.0E-17 indicates an extremely low probability of unrecoverable bit errors, supporting high data integrity requirements, while the 2 million hour MTBF further reinforces confidence in stable, continuous operation.

Technical Specs & Insights

1. The PCIe Gen4 x4 interface provides the bandwidth needed to keep modern enterprise servers fed with data, reducing storage bottlenecks in virtualization, analytics, and AI pipelines.
2. Its high sequential read performance accelerates bulk data access, helping databases, backup repositories, and content delivery platforms shorten load and recovery windows.
3. Strong random read capability paired with low typical latency enables faster transaction response and smoother performance for mixed workloads such as OLTP, VDI, and metadata-heavy applications.
4. A 1 DWPD endurance rating makes it a practical fit for read-centric enterprise deployments that still require dependable daily write headroom over the drive’s service life.
5. Samsung 6th-Gen 128-layer 3D TLC V-NAND balances density, power efficiency, and reliability, giving data centers a cost-effective foundation for scaling mainstream enterprise storage.

Capacity Sweet

Reference capacities in the same family: Lower capacity: 960 GB Higher capacity: 3.84 TB Capacity positioning analysis: In this series, 1.92 TB is the sweet-spot capacity. Compared with the 960 GB model, it gives much better headroom for OS images, application growth, logs, and overprovisioning, reducing early capacity pressure in mixed enterprise workloads. Compared with the 3.84 TB version, it typically delivers a more attractive cost-per-deployment while keeping broadly similar sequential throughput and random IOPS, which is common for enterprise SSDs in the same line. It is especially well suited for mid-scale virtualization clusters, such as shared boot and application storage for about 40 to 60 business workloads.

FAQ