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| Brand | Samsung |
|---|---|
| Model | PM9B1 |
| 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 | 0.3 |
| Total Bytes Written | 150 TBW |
| Sequential Read | 3300 MB/s |
|---|---|
| Sequential Write | 1250 MB/s |
| Random Read IOPS | 240000 |
| Random Write IOPS | 400000 |
| 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 | MZVVL256HCHQ |
|---|
Compared with the previous-generation MZVVL256HCHQ, the PM9B1 MZVL4256HBJD-00B07 delivers a clear step up in client-storage responsiveness by combining 3,300/1,250 MB/s sequential performance with up to 240,000/400,000 IOPS, while maintaining the durability advantages of TLC V-NAND at 150 TBW. This 256GB NVMe SSD is particularly well suited for OEM boot drives, VDI endpoints, and compact business systems where low latency, strong random-write behavior, and predictable 0.3 DWPD endurance matter more than raw capacity.
With an endurance rating of 150 TBW and 0.3 DWPD, this SSD is well suited for typical client and boot-drive workloads such as operating system, office applications, and general daily data access. In practical terms, for normal system-disk usage with moderate daily writes, it can reliably support many years of service, making it a dependable choice for long-term deployment. From a reliability perspective, the 1.0E-15 UBER indicates a very low rate of unrecoverable bit errors, while the 1.5 million-hour MTBF reflects solid long-term operational stability. This model does not include power-loss protection, so it is best used in systems with controlled shutdown behavior or UPS support, where its reliability characteristics remain fully appropriate for standard enterprise procurement needs.
1. The NVMe interface paired with high sequential throughput accelerates VM boot storms, large database scans, and backup restores by removing storage as a bottleneck in enterprise servers.
2. Strong random-read performance keeps latency low under highly concurrent access, making it well suited for OLTP databases, metadata-heavy workloads, and virtual desktop environments.
3. Its light write-endurance profile is best aligned with read-centric enterprise use cases such as content delivery, analytics querying, and boot volumes where write pressure is predictable.
4. TLC V-NAND provides a practical balance of capacity, efficiency, and cost, helping data centers scale flash deployment without moving to a premium endurance tier.
5. The low typical latency improves application responsiveness and QoS consistency, which is especially valuable for transaction systems and latency-sensitive multi-tenant infrastructure.
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 meaningfully better headroom for OS images, logs, swap, metadata, and application growth, reducing the risk of early capacity pressure. Compared with the 512GB option, it preserves nearly the same enterprise-class read/write behavior and random IOPS profile while keeping acquisition cost and fleet standardization more manageable. It is well suited for medium-scale virtualization, such as boot and utility storage for about 40 to 60 compact application nodes.
Q: Is MZVL4256HBJD-00B07 suitable for a write-heavy database server?
A: No. With 0.3 DWPD, 150 TBW, TLC V-NAND, and no PLP, this 256GB NVMe SSD is better suited for client, boot, or light mixed-workload environments rather than write-heavy database servers.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: It is rated for 0.3 DWPD, meaning about 0.3 full drive writes per day during the warranty term. For 256GB capacity, that equals roughly 76.8GB of writes per day.
Q: Does it include power loss protection (PLP) and why is that critical?
A: No, this model does not include power loss protection. PLP is critical in enterprise or transactional workloads 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 general reliability, RAID 1 is commonly recommended for two-drive setups. For higher performance with redundancy, RAID 10 is preferred. RAID 0 is not recommended for important business or database data.