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| Brand | Samsung |
|---|---|
| Model | PM9D3a |
| Capacity | 1.92 TB |
| Usage Class | Enterprise / Data Center Read Intensive |
| Host Interface | PCIe Gen5 x4, NVMe 2.0 |
|---|---|
| Total Interface Bandwidth | 128 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | Samsung V8 (236-layer) TLC |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 3504 TBW |
| Sequential Read | 12000 MB/s |
|---|---|
| Sequential Write | 3500 MB/s |
| Random Read IOPS | 2000000 |
| Random Write IOPS | 110000 |
| Average Latency | 65 μs |
| Mean Time Between Failures | 2.5 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZQL21T9HCJR-00A07 |
|---|
Compared with the previous-generation MZQL21T9HCJR-00A07, the Samsung PM9D3a (MZWL61T9HFLT) advances to PCIe Gen5 x4 and NVMe 2.0, delivering up to 12,000 MB/s sequential read and 2,000,000 random-read IOPS for a clear step up in host-side throughput and response capability. Built on Samsung V8 236-layer TLC with 1 DWPD and 3,504 TBW at 1.92 TB, it is a strong fit for read-centric database, analytics, and high-density cloud server tiers that need Gen5 bandwidth without moving to a higher-endurance, higher-cost SSD class.
With an endurance rating of 3504 TBW and 1 DWPD, the MZWL61T9HFLT is designed to handle writing its full capacity once per day across its rated service life, which is more than sufficient for typical enterprise boot, OS, logging, and mainstream application workloads. In practical terms, under normal mixed or read-heavy usage, procurement teams can expect this drive to deliver long, stable service and easily support use cases such as a system drive for many years without endurance concerns. For enterprise reliability, built-in Power Loss Protection (PLP) helps preserve in-flight data and protects metadata integrity during unexpected power interruptions, reducing the risk of corruption and unplanned recovery events. Its UBER of 1.0E-17 indicates an extremely low uncorrectable bit error rate, which is a key requirement for enterprise storage environments where data integrity, predictable operation, and fleet-level reliability are critical.
1. The PCIe Gen5 x4 interface with NVMe 2.0 gives this drive the host bandwidth and command efficiency needed to keep next-generation AI, analytics, and high-core-count server platforms fed without storage becoming the bottleneck.
2. Its sequential read performance accelerates large-block workloads such as model loading, backup restore, media processing, and data lake scans, cutting wait time for every full-drive pass.
3. The ultra-high random read capability, paired with low typical latency, enables faster response for VM-dense clusters, OLTP databases, and metadata-heavy applications where transaction consistency matters more than raw capacity.
4. A 1 DWPD endurance profile makes it a strong fit for read-centric enterprise deployments that still require predictable day-after-day write tolerance, such as cloud infrastructure, content delivery, and scale-out storage tiers.
5. Samsung V8 236-layer TLC NAND combines data-center-class density, power efficiency, and mature flash reliability, helping operators scale capacity economically without giving up enterprise-grade performance behavior.
Lower-capacity reference: 960 GB Higher-capacity reference: 3.84 TB At 1.92 TB, this SSD sits in the sweet spot of the family. Compared with the 960 GB model, it offers much better headroom for OS, application growth, logs, and mixed enterprise datasets, reducing early capacity pressure. Compared with the 3.84 TB option, it keeps acquisition cost and fleet-wide budget under tighter control while delivering essentially the same class of sequential throughput and random IOPS expected in mainstream enterprise deployments. It is especially well suited for mid-scale virtualization clusters, such as hosting boot and general-purpose data for about 40 to 60 virtual machines.
Q: Is MZWL61T9HFLT suitable for a write-heavy database server?
A: It can support mixed or moderate write-intensive database workloads, but with 1 DWPD it is not the best choice for extremely write-heavy servers. Higher-endurance models are preferable for sustained heavy writes.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated at 1 DWPD, meaning it can handle approximately one full 1.92 TB drive write per day during its warranty term, aligned with its 3504 TBW endurance rating.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, it includes power loss protection. PLP is critical in enterprise environments because it helps preserve in-flight data and metadata during unexpected outages, reducing corruption risk and improving reliability.
Q: What RAID level is recommended for this SSD?
A: The recommended RAID level depends on the application. RAID 1 or RAID 10 is typically preferred for databases and virtualization, while RAID 5 or RAID 6 may suit capacity-focused environments.