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| Brand | Samsung |
|---|---|
| Model | PM9A3 |
| Capacity | 1.92 TB |
| Usage Class | Read Intensive |
| Host Interface | PCIe Gen4 x4 |
|---|---|
| Total Interface Bandwidth | 64 Gb/s |
| Form Factor | U.2 (2.5") |
|---|
| NAND Flash | Samsung V-NAND 6th-Gen 128-layer 3D TLC |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 3504 TBW |
| Sequential Read | 6800 MB/s |
|---|---|
| Sequential Write | 2400 MB/s |
| Random Read IOPS | 850000 |
| Random Write IOPS | 130000 |
| Average Latency | 85 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZ1L21T9HCLS |
|---|
The Samsung PM9A3 MZ1L21T9HCLS-00B7C delivers standout value in the 1.92 TB enterprise read-intensive tier by pairing PCIe Gen4 x4 bandwidth with 6,800 MB/s sequential read, 850,000 random read IOPS, and 3,504 TBW on 6th-Gen 128-layer V-NAND TLC. Compared with the earlier MZ1L21T9HCLS, this -00B7C revision offers a more current PM9A3 deployment point for Gen4 servers, giving architects a stronger balance of throughput, endurance, and platform longevity for virtualization, cloud boot, and high-density content-serving nodes.
With an endurance rating of 3,504 TBW and 1 DWPD, the MZ1L21T9HCLS-00B7C is designed to handle a full drive write per day across its warranty life, which is more than sufficient for typical server boot, system, and mixed enterprise workloads. In practical terms, under normal operating conditions it can serve reliably as a system drive for many years, giving buyers strong confidence in long-term deployment stability. This model also includes power loss protection (PLP), which helps preserve in-flight data and metadata during an unexpected power interruption, reducing the risk of corruption and improving service continuity. Its enterprise-grade UBER of 1.0E-17, together with a 2 million hour MTBF, indicates a very low probability of uncorrectable bit errors and supports dependable operation in business-critical environments.
1. The PCIe Gen4 x4 interface removes host-side bandwidth bottlenecks, making the drive a strong fit for modern servers that need faster data pipelines for virtualization, analytics, and scale-out storage.
2. Its class-leading sequential read performance accelerates model loading, database restore, and large-file streaming, helping cut wait time in read-heavy enterprise workflows.
3. The very high random read capability keeps OLTP databases, metadata services, and VDI environments responsive even under intense parallel access from many users or threads.
4. The 1 DWPD endurance profile is well aligned with read-centric enterprise deployments, offering predictable lifespan and lower operating cost for cloud, content, and general-purpose server workloads.
5. Samsung’s 6th-Gen 128-layer 3D TLC V-NAND, combined with low typical latency, delivers a balanced mix of flash density, consistent QoS, and fast response time for latency-sensitive production applications.
Lower-capacity reference: 960 GB Higher-capacity reference: 3.84 TB In this series, the 1.92 TB model sits at the practical sweet spot. Compared with the 960 GB version, it gives much better headroom for OS images, logs, hot data, and future growth without changing the expected enterprise-class read/write and random IOPS profile. Compared with the 3.84 TB option, it usually delivers the best balance between acquisition cost, usable capacity, and fleet-level efficiency. It is especially well suited for mid-scale virtualization, such as hosting around 40–60 general-purpose virtual machines or a compact but busy database cluster.
Q: Is MZ1L21T9HCLS-00B7C suitable for a write-heavy database server?
A: It can support mixed or moderate write-intensive database workloads, but with 1 DWPD and 3504 TBW, it is not the best choice for extremely write-heavy enterprise database environments.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated for 1 DWPD, meaning it can sustain one full 1.92 TB drive write per day over the warranty period within its endurance specification.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, it includes power loss protection. PLP helps preserve in-flight data and metadata during unexpected outages, which is critical for data integrity, consistency, and enterprise application reliability.
Q: What RAID level is recommended for this SSD?
A: For most enterprise deployments, RAID 1, RAID 10, or RAID 5/6 may be selected depending on performance, redundancy, and capacity goals. RAID 10 is often preferred for databases.