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| Brand | Samsung |
|---|---|
| Model | PM981 |
| Capacity | 512GB |
| Usage Class | Client |
| Host Interface | NVMe |
|---|---|
| Total Interface Bandwidth | 32 Gb/s |
| Form Factor | M.2 2280 |
|---|
| NAND Flash | TLC V-NAND |
|---|---|
| Drive Writes Per Day | 0.3 |
| Total Bytes Written | 300 TBW |
| Sequential Read | 3000 MB/s |
|---|---|
| Sequential Write | 1800 MB/s |
| Random Read IOPS | 270000 |
| Random Write IOPS | 420000 |
| 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 | MZVLV512HCJH |
|---|
Compared with the previous-generation MZVLV512HCJH, the 512GB Samsung PM981 (MZVLB512HAJQ-000D1) delivers a clear generational uplift with up to 3000/1800 MB/s sequential performance and 270K/420K IOPS random performance, giving client and mobile platforms faster boot, load, and scratch-disk responsiveness under PCIe NVMe workloads. Its 300 TBW endurance, 0.3 DWPD rating, and TLC V-NAND architecture make it a stronger long-life choice for high-performance notebooks and OEM systems that need a balanced upgrade in speed, write durability, and deployment maturity over the earlier part.
With an endurance rating of 300 TBW and 0.3 DWPD, this SSD is well suited for typical client, boot, and read-focused business workloads, where daily write volumes are usually modest. In practical terms, for use as an OS drive or general workstation system disk, it can comfortably support many years of normal operation and is a solid fit for long-life deployment within its 1-year warranty period. From a reliability perspective, the 1.5 million-hour MTBF indicates strong expected operational stability, and the UBER rating of 1.0E-15 reflects a very low probability of uncorrectable bit errors during data reads. This model does not include power-loss protection, so while it remains suitable for standard PC and non-cache-critical environments, applications requiring guaranteed in-flight data protection during sudden power interruption should use platform-level safeguards such as UPS, journaling, or higher-end PLP-equipped drives.
1. The NVMe interface removes legacy storage bottlenecks, enabling faster transaction handling and better CPU efficiency in latency-sensitive enterprise servers.
2. Its strong sequential read performance accelerates bulk data access, reducing load times for virtualization images, analytics datasets, and backup recovery workflows.
3. High random read capability supports dense mixed-workload environments, helping databases and VDI platforms maintain responsiveness under heavy concurrent access.
4. The endurance profile is best suited for read-centric enterprise deployments, delivering cost-efficient reliability for content delivery, boot, and scale-out storage tiers.
5. TLC V-NAND paired with low typical latency provides a practical balance of capacity, consistency, and fast response time for cloud applications and always-on business services.
Lower capacity reference: 256GB Higher capacity reference: 1TB In this series, the 512GB model sits at the sweet spot for mainstream enterprise deployment. Compared with the 256GB version, it gives much better space headroom for OS images, application binaries, logs, and moderate data growth, reducing the risk of early capacity pressure. Compared with the 1TB option, it delivers nearly the same class of sequential and random performance while keeping acquisition cost and fleet-wide replacement budgets under tighter control. It is especially well suited for mid-scale virtualization clusters, such as hosting boot and utility volumes for about 40 to 60 lightweight virtual machines.
Q: Is MZVLB512HAJQ-000D1 suitable for a write-heavy database server?
A: Generally no. With TLC V-NAND, 0.3 DWPD, and 300 TBW, this model 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: It is rated for 0.3 drive writes per day, meaning about 30% of the 512GB capacity can be written daily on average over the warranty period within spec.
Q: Does it include power loss protection (PLP) and why is that critical?
A: No, it does not include PLP. That matters because PLP helps protect in-flight data and metadata during sudden power failure, which is especially important for enterprise or transactional workloads.
Q: What RAID level is recommended for this SSD?
A: RAID 1 or RAID 10 is typically recommended for better redundancy and performance balance. For capacity-focused use, RAID 5 may work, but write penalty should be considered.