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| Brand | Samsung |
|---|---|
| Model | PM9A1 |
| Capacity | 256GB |
| Usage Class | Client |
| Host Interface | NVMe |
|---|---|
| Total Interface Bandwidth | 64 Gb/s |
| Form Factor | M.2 2280 |
|---|
| NAND Flash | TLC V-NAND |
|---|---|
| Drive Writes Per Day | 0.33 |
| Total Bytes Written | 150 TBW |
| Sequential Read | 6400 MB/s |
|---|---|
| Sequential Write | 2700 MB/s |
| Random Read IOPS | 500000 |
| Random Write IOPS | 600000 |
| 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 | MZVLB256HBHQ |
|---|
Compared with the previous-generation MZVLB256HBHQ, the 256GB PM9A1 (MZ-VL22560) moves to a newer TLC V-NAND NVMe platform that delivers up to 6,400/2,700 MB/s and 500K/600K IOPS, providing a clear uplift in sequential bandwidth and random-write responsiveness for the same capacity tier. With 150 TBW and 0.33 DWPD, it is a strong fit for OEM boot drives, compact workstations, and read-heavy edge or virtualization nodes that need Gen4-class performance without stepping up to a higher-capacity SKU.
With a rated endurance of 150 TBW, this SSD can sustain about 20–40 GB of host writes per day for roughly 10 years, making it a comfortable fit for typical OS boot, office productivity, web, and light application workloads. Its 0.33 DWPD rating further indicates that normal client or system-disk usage is well within the drive’s designed write endurance envelope. Its UBER of 1.0E-15 means the expected unrecoverable read error rate is no worse than one bit per 10^15 bits read, which is in line with mainstream high-quality SSD reliability expectations for business and system use. This model does not include power-loss protection (PLP), so it is best deployed in systems with stable power or UPS support if write integrity during sudden outages is a concern, while remaining fully appropriate for standard boot-drive and general-purpose applications.
1. The NVMe interface, paired with up to 6400 MB/s sequential read performance, accelerates large-block data access so enterprise databases, virtualization clusters, and analytics platforms spend less time waiting on storage.
2. With 500,000 K IOPS random read capability, this drive is built to sustain highly concurrent small-block workloads such as OLTP systems, metadata-heavy applications, and dense VM environments without becoming a bottleneck.
3. A 0.33 DWPD endurance profile makes it a strong fit for read-centric enterprise deployments where predictable lifespan, lower replacement frequency, and controlled storage TCO matter more than heavy daily overwrite capacity.
4. TLC V-NAND balances flash density, efficiency, and reliability, giving data centers a practical mix of scalable capacity and consistent performance for mainstream enterprise workloads.
5. The 50 µs typical latency helps reduce response-time variance, which is especially valuable for latency-sensitive applications that depend on fast transaction handling and smoother quality of service.
Lower capacity reference: 128GB Higher capacity reference: 512GB In this series, the 256GB model sits at the practical sweet spot. Compared with the 128GB version, it gives noticeably more headroom for OS images, logs, metadata, and application growth, reducing early capacity pressure in always-on enterprise environments. Compared with the 512GB option, it usually delivers the best balance between acquisition cost and workload-class performance, especially when sequential throughput and random IOPS stay broadly similar across capacities. It is well suited for small to mid-sized virtualization clusters, such as hosting boot volumes and utility workloads for around 40 to 60 server instances.
Q: Is MZ-VL22560 suitable for a write-heavy database server?
A: MZ-VL22560 is generally not recommended for write-heavy database servers. With 0.33 DWPD, 150 TBW, TLC V-NAND, and no PLP, it is better suited for read-intensive or mixed-light workloads.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated at 0.33 DWPD, meaning about one-third of its 256GB capacity can be written daily over the warranty period. That equals roughly 84GB of writes per day.
Q: Does it include power loss protection (PLP) and why is that critical?
A: No, MZ-VL22560 does not include power loss protection. PLP is critical in enterprise environments because it helps prevent in-flight data loss and metadata corruption during unexpected 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 better protection, especially since the drive lacks PLP.