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| Brand | Samsung |
|---|---|
| Model | PM1735A |
| Capacity | 6.4 TB |
| Usage Class | Mixed Use |
| Host Interface | PCIe Gen4 x8 |
|---|---|
| Total Interface Bandwidth | 128 Gb/s |
| Form Factor | 2.5" |
|---|
| NAND Flash | Samsung V-NAND 6th-Gen 128-layer 3D TLC |
|---|---|
| Drive Writes Per Day | 3 |
| Total Bytes Written | 35040 TBW |
| Sequential Read | 7000 MB/s |
|---|---|
| Sequential Write | 3800 MB/s |
| Random Read IOPS | 1450000 |
| Random Write IOPS | 260000 |
| Average Latency | 90 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZ-WLR6T40 |
|---|
Compared with the earlier MZ-WLR6T40, the MZ-WLR6T4B (PM1735A) brings a clear generational upgrade with PCIe Gen4 x8 and Samsung 6th-Gen 128-layer V-NAND, delivering up to 7,000 MB/s sequential read and 1.45M random-read IOPS for substantially higher throughput in latency-sensitive server deployments. Its 6.4 TB capacity, 3 DWPD rating, and 35,040 TBW endurance make it especially compelling for mixed OLTP databases, virtualization clusters, and high-ingest analytics workloads where sustained write durability matters as much as peak performance.
With an endurance rating of 35,040 TBW, the MZ-WLR6T4B is built for sustained heavy use and is equivalent to writing the full drive capacity about 3 times per day over a 5-year service life. In typical enterprise workloads, this means it can comfortably handle demanding system, database, virtualization, or cache-disk duties with substantial long-term write headroom. Its power-loss protection (PLP) helps preserve in-flight data and protect metadata integrity during unexpected power interruptions, which is critical for enterprise servers and storage systems. An ultra-low UBER of 1.0E-17, together with a 2 million-hour MTBF, indicates a very high level of data integrity and operational reliability, helping reduce the risk of unrecoverable read errors in mission-critical environments.
1. The PCIe Gen4 x8 interface, paired with top-tier sequential read bandwidth, keeps data-hungry analytics and AI servers fed fast enough to reduce startup, scan, and reload bottlenecks across large datasets.
2. Its exceptional random read capability is built for dense virtualization, metadata-heavy databases, and high-concurrency cloud workloads where millions of small accesses must be served without queue buildup.
3. A 3 DWPD endurance profile makes it suitable for write-intensive enterprise roles such as OLTP, logging, caching, and mixed-use storage tiers that are rewritten aggressively every day.
4. Samsung’s 6th-generation 128-layer 3D TLC V-NAND delivers a strong balance of capacity, power efficiency, and sustained enterprise reliability, helping operators scale flash economically without moving to lower-end media.
5. The typical 90 µs latency supports highly responsive application behavior, cutting storage wait time for latency-sensitive services like real-time transactions, search, and distributed databases.
Lower capacity reference: 3.2 TB Higher capacity reference: 12.8 TB At 6.4 TB, this model sits in the sweet spot of the family. Compared with 3.2 TB, it provides much better headroom for VM growth, database expansion, and overprovisioning flexibility, reducing the risk of early capacity bottlenecks. Compared with 12.8 TB, it typically delivers a more efficient cost profile while keeping essentially the same enterprise-class sequential throughput and random IOPS behavior. That makes 6.4 TB a strong fit for mid-scale virtualization clusters, such as hosting boot and application storage for roughly 60 to 80 general-purpose virtual machines.
Q: Is MZ-WLR6T4B suitable for a write-heavy database server?
A: Yes. With 3 DWPD endurance, 35,040 TBW, low 90 µs typical latency, and PCIe Gen4 x8 bandwidth, the MZ-WLR6T4B is well suited for write-intensive database and transactional workloads.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: It is rated for 3 full drive writes per day. For a 6.4 TB SSD, that equals about 19.2 TB of writes daily across the full warranty coverage period.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, it includes PLP. Power loss protection helps preserve in-flight data and metadata during unexpected outages, which is critical for maintaining data integrity and filesystem consistency in enterprise environments.
Q: What RAID level is recommended for this SSD?
A: RAID 10 is commonly recommended for performance-sensitive enterprise workloads, especially databases. It provides strong read/write performance and redundancy. RAID 1 or RAID 5/6 may also fit, depending on capacity and fault-tolerance needs.