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| Brand | Samsung |
|---|---|
| Model | PM1725B |
| Capacity | 6.4 TB |
| Usage Class | Mixed Use |
| Host Interface | PCIe Gen3 x4 |
|---|---|
| Total Interface Bandwidth | 32 Gb/s |
| Form Factor | U.2 (2.5") |
|---|
| NAND Flash | Samsung V-NAND 4th-Gen 64-layer 3D TLC |
|---|---|
| Drive Writes Per Day | 5 |
| Total Bytes Written | 58400 TBW |
| Sequential Read | 3300 MB/s |
|---|---|
| Sequential Write | 2900 MB/s |
| Random Read IOPS | 800000 |
| Random Write IOPS | 160000 |
| Average Latency | 90 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZWLL6T4HMLA |
|---|
The Samsung PM1725B (MZ-WLL6T4B) delivers a strong generational step over MZWLL6T4HMLA by moving to 4th-Gen 64-layer V-NAND and combining 6.4 TB capacity with 3,300/2,900 MB/s sequential performance and up to 800,000/160,000 IOPS for higher performance density in the same PCIe Gen3 x4 footprint. With 5 DWPD and 58,400 TBW, it offers a more robust write-endurance profile for mixed OLTP databases, large-scale virtualization, and cache-heavy enterprise workloads where predecessor-class drives typically become the limiting factor.
With an endurance rating of 58,400 TBW and 5 DWPD, the MZ-WLL6T4B is built for highly write-intensive enterprise workloads, supporting approximately 58.4 petabytes of total writes over its rated service life. In practical terms, this is far beyond the needs of typical OS, boot, application, and logging workloads, making it a low-risk choice for long-term deployment and easily suitable as a system drive for 10 years under normal usage. Its Power Loss Protection (PLP) helps preserve in-flight data and protects metadata integrity during unexpected power outages, reducing the risk of corruption and downtime. Combined with an enterprise-class UBER of 1.0E-17 and a 2 million-hour MTBF rating, it delivers extremely strong data integrity and dependable operation for business-critical environments.
1. The PCIe Gen3 x4 interface provides a stable high-bandwidth path to the host, helping database, virtualization, and analytics platforms move data fast without requiring a newer server backplane.
2. With sequential read performance of 3300 MB/s, the drive accelerates large-block workloads such as backup restore, data lake scans, and media ingestion to shorten job completion windows.
3. Its 800,000 K IOPS random read capability is built for highly concurrent enterprise applications, keeping response times consistent in OLTP databases, VDI farms, and metadata-heavy storage environments.
4. A 5 DWPD endurance rating makes it a strong fit for write-intensive deployments, allowing sustained daily overwrite activity in caching tiers, logging systems, and mixed enterprise workloads with lower replacement risk.
5. Samsung 4th-Gen 64-layer V-NAND 3D TLC, paired with a typical latency of 90 µs, delivers a balanced profile of density, reliability, and fast access behavior for predictable performance in latency-sensitive business applications.
Lower-capacity reference: 3.2 TB Higher-capacity reference: 12.8 TB Within this enterprise SSD family, the 6.4 TB model sits at the sweet spot of the lineup. Compared with the 3.2 TB version, it gives much better headroom for dataset growth, longer refresh cycles, and denser consolidation without changing the expected enterprise-class sequential throughput or random IOPS profile. Compared with the 12.8 TB option, it usually delivers the most practical balance of usable capacity, acquisition cost, and performance consistency. It is especially well suited for mid-scale virtualization clusters, such as hosting boot and application volumes for about 40-60 virtual machines per node.
Q: Is MZ-WLL6T4B suitable for a write-heavy database server?
A: Yes. MZ-WLL6T4B is well suited for write-heavy database servers, thanks to its 5 DWPD endurance, 58,400 TBW rating, low 90 µs latency, and enterprise-grade Samsung V-NAND TLC design.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: It is rated for 5 full drive writes per day. For a 6.4 TB drive, that equals 32 TB of writes daily, aligning with its 58,400 TBW endurance over five years.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, it includes power loss protection. PLP is critical because it helps preserve in-flight data and metadata during unexpected outages, reducing corruption risk and improving storage reliability in enterprise systems.
Q: What RAID level is recommended for this SSD?
A: For enterprise deployments, RAID 10 is typically recommended if you need strong write performance, low latency, and redundancy. If capacity efficiency matters more, RAID 5 or RAID 6 can also be considered.