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| Brand | Samsung |
|---|---|
| Model | SM841N |
| Capacity | 256GB |
| Usage Class | Client |
| Host Interface | SATA |
|---|---|
| Total Interface Bandwidth | 6 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | MLC |
|---|---|
| Drive Writes Per Day | 0.5 |
| Total Bytes Written | 150 TBW |
| Sequential Read | 540 MB/s |
|---|---|
| Sequential Write | 250 MB/s |
| Random Read IOPS | 96000 |
| Random Write IOPS | 62000 |
| Average Latency | 50 μs |
| Mean Time Between Failures | 1.5 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | No |
| MPN | MZ-7PD256 |
|---|
Compared with the earlier MZ-7PD256, the SM841N (MZ-7PD256M) brings a stronger enterprise SATA profile with up to 96,000/62,000 random read/write IOPS and 150 TBW at 0.5 DWPD, giving it better mixed-workload responsiveness and endurance in the same 256GB class. Its MLC NAND and 540/250 MB/s sequential performance make it a particularly solid choice for read-intensive virtualization boot tiers, database log volumes, and cache-friendly edge servers where consistency and long-term reliability matter more than headline capacity.
With an endurance rating of 150 TBW and 0.5 DWPD, the MZ-7PD256M is well suited for typical read-centric workloads such as OS boot, office productivity, light application hosting, and general-purpose system storage. In practical terms, for a 256GB-class drive, this level of endurance comfortably supports use as a system disk for many years under normal business usage, often making 10-year-equivalent write demand well within range in standard desktop or embedded scenarios. From a reliability standpoint, the drive is rated at 1.5 million hours MTBF and an UBER of 1.0E-15, meaning the expected uncorrectable bit error rate is low and aligned with dependable SSD operation in professional environments. The drive does not include power-loss protection (PLP), so while it is a strong fit for stable-power systems and non-transaction-critical applications, workloads that require guaranteed in-flight data protection during sudden power interruption should use platform-level backup power or a PLP-equipped SSD.
1. The SATA interface, paired with near-bus-limit sequential throughput, makes this drive an easy drop-in upgrade for legacy enterprise servers and storage arrays without requiring platform changes.
2. Its strong random-read capability helps VDI, OLTP, and metadata-heavy workloads return small-block data faster, improving VM responsiveness and user experience under concurrency.
3. This endurance profile is well suited to read-centric enterprise deployments such as boot, caching, reporting, and content serving, where write pressure is steady but not extreme.
4. MLC NAND provides a better balance of performance consistency, endurance, and data integrity than lower-cost consumer flash, making it a safer fit for business-critical duty cycles.
5. The very low typical latency supports faster transaction completion and more predictable QoS, which is especially valuable in latency-sensitive database and virtualization environments.
For the MZ-7PD256M 256GB enterprise SSD, the closest lower capacity in the same family is 128GB, and the next higher capacity is 512GB. In this lineup, 256GB is the practical sweet spot: compared with 128GB, it gives much better headroom for OS images, logs, swap, and application growth, reducing early capacity pressure. Compared with 512GB, it preserves nearly the same enterprise-class sequential throughput and random IOPS while delivering a more efficient cost-per-node. It is best suited for small-to-mid virtualization clusters, such as boot and utility storage for roughly 40 to 60 lightweight VM instances.
Q: Is MZ-7PD256M suitable for a write-heavy database server?
A: MZ-7PD256M is generally not ideal for write-heavy database workloads. With 0.5 DWPD, 150 TBW, and no PLP, it is better suited for read-intensive or mixed-use environments.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This SSD is rated for 0.5 drive writes per day, meaning about half of its 256GB capacity can be written daily on average throughout the supported warranty period.
Q: Does it include power loss protection (PLP) and why is that critical?
A: No, it does not include power loss protection. PLP is critical in enterprise systems 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, depending on capacity and performance needs. These levels provide redundancy and help reduce operational risk in business deployments.