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| Brand | Samsung |
|---|---|
| Model | 850 PRO |
| Capacity | 256GB |
| Usage Class | Client |
| Host Interface | SATA |
|---|---|
| Total Interface Bandwidth | 6 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | MLC V-NAND |
|---|---|
| Drive Writes Per Day | 0.32 |
| Total Bytes Written | 150 TBW |
| Sequential Read | 550 MB/s |
|---|---|
| Sequential Write | 520 MB/s |
| Random Read IOPS | 100000 |
| Random Write IOPS | 90000 |
| Average Latency | 50 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | No |
| MPN | MZ-7PD256 |
|---|
The Samsung 850 PRO 256GB (MZ7KN256HMJP) stands out in the SATA class by combining 3D MLC V-NAND with 550/520 MB/s sequential performance, up to 100,000/90,000 IOPS, and 150 TBW endurance, making it a strong fit for latency-sensitive client workstations and read/write-balanced boot or application tiers. Compared with the earlier MZ-7PD256 generation, MZ7KN256HMJP delivers a clear architectural upgrade through V-NAND-based MLC, translating into higher random I/O capability and more robust write-endurance behavior within the same SATA form factor.
With an endurance rating of 150 TBW and 0.32 DWPD, this SSD is well suited for typical read-focused and mixed business workloads such as OS boot, office applications, edge systems, and general server caching. In practical terms, that level of endurance is more than sufficient for a system drive in normal enterprise or industrial use, supporting many years of stable operation without endurance-related concern when daily writes remain moderate. From a reliability standpoint, the drive is specified for a 2 million hour MTBF and an UBER of 1.0E-15, meaning it is designed for dependable long-term service with a very low probability of unrecoverable bit errors during data reads. It does not include power-loss protection, so it is best deployed in systems with stable power or upstream power safeguarding, while still providing solid enterprise-grade read reliability and predictable performance for non-PLP-critical applications.
1. The SATA interface, paired with 550 MB/s sequential read performance, enables straightforward drop-in upgrades for legacy enterprise platforms while accelerating boot, backup, and bulk data retrieval tasks.
2. Random read performance of 100,000 K IOPS helps virtualized databases and high-concurrency application servers respond faster under heavy mixed-workload access patterns.
3. A 0.32 DWPD endurance rating is well aligned with read-centric enterprise deployments, helping control storage cost in content delivery, boot, and analytics tiers with moderate daily write pressure.
4. MLC V-NAND provides a strong balance of write endurance, performance consistency, and data retention, making it a dependable choice for always-on business infrastructure.
5. The 50 µs typical latency supports quicker transaction servicing and more predictable QoS, which is valuable for latency-sensitive enterprise applications.
Lower capacity: 128GB Higher capacity: 512GB In this series, 256GB is the practical sweet spot. Compared with the 128GB model, it gives noticeably better headroom for OS images, logs, patch growth, and application metadata, reducing early capacity pressure in always-on enterprise environments. Compared with the 512GB option, it keeps acquisition cost and fleet-wide budget under tighter control while delivering broadly similar sequential throughput and random IOPS for mainstream server workloads. It is especially well suited for mid-scale deployment, such as boot and utility storage for about 25 to 40 virtualized application hosts.
Q: Is MZ7KN256HMJP suitable for a write-heavy database server?
A: Not ideally. With 0.32 DWPD and 150 TBW, MZ7KN256HMJP is better suited for read-intensive or mixed workloads rather than sustained write-heavy database server environments.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated for 0.32 DWPD, meaning it can support about 0.32 full drive writes per day on its 256GB capacity throughout the specified warranty period.
Q: Does it include power loss protection (PLP) and why is that critical?
A: No, it does not include PLP. Power loss protection is critical in enterprise systems because it helps prevent in-flight data loss and reduces metadata corruption during sudden outages.
Q: What RAID level is recommended for this SSD?
A: For most business deployments, RAID 1 or RAID 10 is recommended to improve redundancy and performance. RAID choice should also depend on workload profile, capacity needs, and uptime requirements.