Samsung MZTL21T9HCJR 1.92 TB PM9A3 PCIe 4.0 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 4.0 x4
Total Interface Bandwidth	16 Gb/s

Physical Dimension

Form Factor	E1.S

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	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	MZ7KM480HAHP-00005

Engineer's Note

The Samsung PM9A3 MZTL21T9HCJR delivers a strong step up for mainstream enterprise servers, combining a 1.92 TB capacity point with PCIe 4.0 x4 NVMe performance of up to 6,800/2,400 MB/s and 850K/115K IOPS on Samsung 6th Gen V-NAND TLC. Compared with MZ7KM480HAHP-00005, it moves to a much higher-bandwidth PCIe Gen4 architecture while scaling to 3504 TBW at 1 DWPD, making it a distinctly better fit for read-intensive virtualization, scale-out storage, and database workloads that need higher throughput and larger per-drive consolidation.

Endurance & Reliability

With an endurance rating of 3,504 TBW, the MZTL21T9HCJR can sustain about 3.5 petabytes of total writes, which is far beyond the write volume of a typical OS, boot, or read-heavy application drive. In practical terms, even at 1 TB of host writes per day, it would take roughly 9.6 years to reach the TBW limit, and its 1 DWPD rating confirms it is designed for consistent daily enterprise use. For 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 unplanned recovery events. Its UBER of 1.0E-17 means the drive is engineered for an extremely low unrecoverable bit error rate, which is a key enterprise-class safeguard for data integrity in servers and storage systems.

Technical Specs & Insights

1. The PCIe 4.0 x4 host interface unlocks high-bandwidth data paths that speed up analytics scans, VM boot storms, and large-scale data ingestion in modern enterprise servers.
2. With sequential read performance up to 6800 MB/s, this SSD shortens backup recovery windows and reduces wait time for loading large datasets, media assets, and AI models.
3. Its 850,000 random-read IOPS capability helps databases, virtualization clusters, and metadata-heavy workloads respond faster under highly concurrent access patterns.
4. Rated for 1 DWPD, the drive is tuned for mainstream enterprise deployments that need dependable day-after-day write endurance without overprovisioning for extreme write workloads.
5. Samsung 6th Gen V-NAND TLC, together with a typical latency of 85 µs, provides a strong balance of flash density, cost efficiency, and consistently low response times for latency-sensitive applications.

Capacity Sweet

Lower capacity reference: 960 GB Higher capacity reference: 3.84 TB In this SSD family, 1.92 TB sits at the sweet spot for mainstream enterprise deployment. Compared with the 960 GB model, it provides much better headroom for OS images, logs, hot data, and future growth, reducing early capacity pressure. Compared with the 3.84 TB version, it typically delivers the best balance of acquisition cost, usable capacity, and standard enterprise-class performance consistency. This makes 1.92 TB especially suitable for mid-scale virtualization clusters, such as hosting boot and application volumes for about 40 to 60 business VMs per node.

FAQ