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| Brand | Samsung |
|---|---|
| Model | PM871b |
| Capacity | 256GB |
| Usage Class | Client / OEM |
| Host Interface | SATA 6.0 Gbps |
|---|---|
| Total Interface Bandwidth | 6 Gb/s |
| Form Factor | 2.5-inch |
|---|
| NAND Flash | Samsung V-NAND TLC |
|---|---|
| Drive Writes Per Day | 0.5 |
| Total Bytes Written | 150 TBW |
| Sequential Read | 540 MB/s |
|---|---|
| Sequential Write | 500 MB/s |
| Random Read IOPS | 97000 |
| Random Write IOPS | 88000 |
| Average Latency | 130 μs |
| Mean Time Between Failures | 1.5 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | No |
| MPN | MZ-7LN2560 |
|---|
Compared with the MZ-7LN2560, the Samsung PM871b (MZ-7LN256C) is the more deployment-ready 256GB SATA refresh, combining Samsung V-NAND TLC with a 150 TBW / 0.5 DWPD endurance profile and up to 540/500 MB/s sequential performance. Its 97,000/88,000 IOPS random throughput gives it a clear advantage for OS boot, VDI image, and enterprise client workloads that need stronger responsiveness and better write tolerance than earlier SATA client SSD generations.
With an endurance rating of 150 TBW, this SSD can sustain about 41 GB of host writes per day for 10 years, which is more than enough for typical OS boot, office productivity, and general business application workloads. In practical purchasing terms, that makes it a solid choice for use as a system drive or light-duty client storage where daily write volumes remain moderate. The UBER specification of 1.0E-15 means the drive is designed for a very low rate of unrecoverable read errors, supporting dependable data access in normal enterprise and commercial usage. This model does not include power-loss protection (PLP), so it is best positioned for boot drives and non-transaction-critical workloads, especially in systems backed by stable power or UPS protection.
1. The SATA 6.0 Gbps interface, paired with up to 540 MB/s sequential read speed, provides a cost-efficient upgrade path for enterprise servers that need faster boot, backup, and dataset access without changing existing SATA infrastructure.
2. With 97,000 random read IOPS, this drive can accelerate transaction-heavy workloads such as virtualization, web hosting, and database lookup operations by serving small-block requests with far less storage bottleneck.
3. Rated at 0.5 DWPD, it is well suited for read-centric enterprise deployments where predictable endurance supports steady long-term operation while keeping storage TCO under control.
4. Samsung V-NAND TLC enables a strong balance of capacity, power efficiency, and reliability, making it practical for scale-out data center environments that need dependable performance at mainstream enterprise cost points.
5. A typical latency of 130 µs helps reduce application response time and improve service consistency, which is especially valuable for latency-sensitive business systems and multi-user server workloads.
Lower-capacity reference: 128GB (MZ-7LN128C) Higher-capacity reference: 512GB (MZ-7LN512C) Capacity positioning analysis: Within this series, the 256GB MZ-7LN256C sits at the sweet spot for mainstream enterprise deployment. Compared with the 128GB version, it offers far more headroom for OS images, logs, patch growth, and application buffers, reducing capacity pressure over the service life. Compared with the 512GB model, it delivers nearly the same typical sequential and random performance profile while keeping acquisition cost and fleet standardization more efficient. It is especially well suited for mid-scale virtualization clusters, such as shared boot and utility storage for about 30 to 50 light-duty virtual machines.
Q: Is MZ-7LN256C suitable for a write-heavy database server?
A: MZ-7LN256C is not ideal for write-heavy database servers. With 0.5 DWPD, 150 TBW, TLC V-NAND, and no PLP, it is better suited for light to moderate mixed workloads.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated for 0.5 DWPD, meaning about half of its 256GB capacity can be written daily over the warranty period. That equals roughly 128GB of writes per day.
Q: Does it include power loss protection (PLP) and why is that critical?
A: No, this SSD does not include power loss protection. PLP is critical in server environments because it helps prevent in-flight data loss and metadata corruption during sudden power failures.
Q: What RAID level is recommended for this SSD?
A: For this SSD, RAID 1 or RAID 10 is typically recommended for better data protection and read performance. For write-sensitive applications, choose a RAID design aligned with endurance requirements.