General

Brand	Samsung
Model	PM871b
Capacity	256GB
Usage Class	Client

Interface

Host Interface	SATA
Total Interface Bandwidth	6 Gb/s

Physical Dimension

Form Factor	2.5

Flash & Endurance

NAND Flash	TLC V-NAND
Drive Writes Per Day	0.3
Total Bytes Written	75 TBW

Performance

Sequential Read	540 MB/s
Sequential Write	500 MB/s
Random Read IOPS	97000
Random Write IOPS	88000
Average Latency	50 μs

Reliability

Mean Time Between Failures	1.5 Million Hours
Uncorrectable Bit Error Rate	1.0×10⁻¹⁷
Power Loss Protection	No

Part Number

MPN	MZ7LN256HCHP

Engineer's Note

Compared with the previous-generation MZ7LN256HCHP, the Samsung PM871b MZ7LN256HAJQ-000H1 delivers a clear generational uplift in SATA responsiveness—up to 540/500 MB/s sequential throughput and 97,000/88,000 IOPS—while TLC V-NAND and a 75 TBW rating provide stronger endurance efficiency for 24x7 client and light-enterprise duty cycles. For 256GB SATA deployments, its standout value is delivering near-interface-limit performance with predictable 0.3 DWPD durability, making it a stronger choice than older SATA SSDs for OS boot, VDI endpoints, and read-heavy edge systems where stability, power efficiency, and cost control matter most.

Endurance & Reliability

With an endurance rating of 75 TBW and 0.3 DWPD, the MZ7LN256HAJQ-000H1 is well suited for typical read-heavy and mixed everyday workloads such as OS boot, office applications, endpoint computing, and light server use. In practical terms, for a 256GB system drive writing around 20GB per day, this level of endurance can comfortably support about 10 years of operation, giving buyers confidence for standard system-disk deployments. From a reliability perspective, the drive is rated at 1.5 million hours MTBF and an UBER of 1.0E-15, meaning the expected unrecoverable bit error rate is very low and aligned with dependable SSD operation in mainstream business environments. This model does not include power-loss protection, so it is best positioned for applications where sudden power interruption is controlled at the system level, such as PCs or platforms protected by stable power infrastructure and UPS support.

Technical Specs & Insights

1. The SATA interface ensures broad compatibility with mainstream enterprise servers and storage arrays, enabling cost-effective upgrades without changing existing backplanes or controller ecosystems.
2. Its 540 MB/s sequential read performance accelerates boot storms, backup restores, and large-file delivery for read-heavy business applications.
3. With 97,000 random read IOPS, the drive can sustain responsive access for virtual machines, OLTP datasets, and high-concurrency metadata workloads.
4. A 0.3 DWPD endurance rating makes it well suited for read-centric enterprise deployments such as content repositories, analytics caching, and boot/storage tiers with moderate daily write pressure.
5. TLC V-NAND paired with a typical 50 µs latency delivers a strong balance of capacity efficiency and consistently fast response time for dense, latency-sensitive data center environments.

Capacity Sweet

Reference capacities in the same family for MZ7LN256HAJQ-000H1 (256GB): Lower capacity reference: 128GB Higher capacity reference: 512GB Capacity positioning analysis: At 256GB, this drive sits in the sweet spot of the series. Compared with the 128GB model, it gives noticeably more headroom for OS images, logs, patch growth, and application buffering, reducing the risk of early capacity pressure. Compared with the 512GB version, it preserves very similar day-to-day enterprise performance while keeping acquisition cost and fleet-wide replacement budgets under tighter control. This makes 256GB a practical choice for medium-scale virtualization clusters, such as hosting boot and utility volumes for roughly 40 to 60 infrastructure nodes.

FAQ