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| Brand | Samsung |
|---|---|
| Model | PM9A3 |
| Capacity | 15.36 TB |
| Usage Class | Enterprise / Data Center Read Intensive |
| Host Interface | PCIe Gen4 x4, NVMe 1.4 |
|---|---|
| Total Interface Bandwidth | 64 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | Samsung V6 (128-layer) TLC |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 28032 TBW |
| Sequential Read | 6900 MB/s |
|---|---|
| Sequential Write | 4100 MB/s |
| Random Read IOPS | 1100000 |
| Random Write IOPS | 200000 |
| Average Latency | 85 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZ-QL215T0 |
|---|
The Samsung PM9A3 15.36TB (MZ-WLJ15TA) stands out as a high-density, read-optimized enterprise NVMe SSD, combining Samsung 128-layer TLC with PCIe Gen4 x4 to deliver up to 6,900/4,100 MB/s and 1.1M/200K IOPS for latency-sensitive cloud and scale-out storage platforms. Compared with the previous-generation MZ-QL215T0, it brings a clear generational leap through the move to PCIe Gen4 and newer V6 NAND, enabling substantially higher throughput and stronger large-capacity efficiency while sustaining enterprise-class endurance at 1 DWPD and 28,032 TBW.
With an endurance rating of 28,032 TBW and 1 DWPD, the MZ-WLJ15TA is designed to sustain writing its full capacity once per day throughout a standard enterprise service life, which is far beyond the write demand of typical OS, boot, and general application workloads. In practical terms, for read-heavy or mixed-use deployments, this level of endurance provides ample headroom for long-term, worry-free operation and helps reduce concerns about premature wear-out. For enterprise reliability, built-in Power Loss Protection (PLP) helps preserve in-flight data and protects metadata integrity if power is interrupted unexpectedly, reducing the risk of corruption and unplanned recovery events. Its UBER of 1.0E-17, together with a 2 million-hour MTBF, reflects a very high standard of data integrity and operational dependability expected for business-critical storage environments.
1. The PCIe Gen4 x4, NVMe 1.4 architecture gives this drive enough host-side bandwidth to keep modern servers, virtualized workloads, and data-intensive applications from being bottlenecked by storage.
2. Its class-leading sequential read performance sharply reduces startup, restore, and large dataset streaming times, making it ideal for analytics clusters and content-heavy enterprise platforms.
3. The very high random read capability enables fast response under heavily concurrent access patterns such as databases, OLTP systems, and large-scale VMs.
4. With enterprise-grade write endurance rated for full-drive rewrites every day, it is well suited for mixed-use deployments that need predictable lifespan under continuous production traffic.
5. Built on Samsung’s mature 128-layer TLC NAND, it balances capacity, power efficiency, low latency, and long-term reliability for always-on data center operation.
Lower capacity reference: 7.68 TB Higher capacity reference: 30.72 TB Capacity positioning analysis: In this series, the 15.36 TB model sits at the practical sweet spot. Compared with 7.68 TB, it offers much better headroom for data growth, higher VM density, and fewer drive slots consumed, which helps simplify storage planning. Compared with 30.72 TB, it usually delivers a more attractive cost-per-deployment while keeping enterprise-class sequential and random performance essentially in the same range. This makes 15.36 TB especially well suited for mid-scale virtualization clusters, mixed database workloads, or all-flash nodes serving roughly 150 to 250 business application instances.
Q: Is MZ-WLJ15TA suitable for a write-heavy database server?
A: MZ-WLJ15TA can support mixed-read/write database workloads, but with 1 DWPD it is better suited for mainstream enterprise databases rather than extremely write-intensive logging or analytics environments.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This SSD is rated at 1 DWPD, meaning it can sustain one full 15.36 TB drive write per day across its warranty period, totaling 28,032 TBW endurance.
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 sudden outages, which is critical for maintaining data integrity and preventing corruption.
Q: What RAID level is recommended for this SSD?
A: RAID 10 is commonly recommended for this SSD in performance-sensitive enterprise workloads, as it balances redundancy and speed. RAID 5 or 6 may suit capacity-focused deployments better.