General

Brand	Samsung
Model	PM981
Capacity	512GB
Usage Class	Client

Interface

Host Interface	NVMe
Total Interface Bandwidth	32 Gb/s

Physical Dimension

Form Factor	M.2 2280

Flash & Endurance

NAND Flash	TLC V-NAND
Drive Writes Per Day	0.32
Total Bytes Written	300 TBW

Performance

Sequential Read	3000 MB/s
Sequential Write	1800 MB/s
Random Read IOPS	270000
Random Write IOPS	420000
Average Latency	50 μs

Reliability

Mean Time Between Failures	1.5 Million Hours
Uncorrectable Bit Error Rate	1.0×10⁻¹⁷
Power Loss Protection	No

Part Number

MPN	MZVLV512HCJH

Engineer's Note

Compared with the previous-generation MZVLV512HCJH, the PM981 MZVLB512HAJQ-00000 moves to a newer TLC V-NAND NVMe platform that delivers up to 3000/1800 MB/s sequential performance and 270,000/420,000 IOPS, while maintaining 300 TBW endurance at 512GB. This makes it a stronger-fit OEM SSD for high-performance client boot drives, mobile workstations, and read-intensive application loads that need faster random responsiveness and better sustained throughput than the earlier generation.

Endurance & Reliability

With an endurance rating of 300 TBW and 0.32 DWPD, the MZVLB512HAJQ-00000 is well suited for typical client and light business workloads, including OS, office applications, web access, and general data storage. In practical terms, for a 512GB system drive under normal daily use, this level of endurance is generally sufficient for many years of reliable service and can comfortably support long-term deployment when not subjected to heavy write-intensive workloads. From a reliability perspective, the 1.5 million-hour MTBF and 1.0E-15 UBER indicate a mature SSD design with a very low expected rate of uncorrectable bit errors in normal operation. This model does not include power loss protection (PLP), so while it is a dependable choice for standard desktops and notebooks, environments with frequent sudden power interruptions or write-critical transactions should rely on system-level backup power or data protection measures.

Technical Specs & Insights

1. The NVMe interface removes legacy storage bottlenecks, enabling faster parallel data access for virtualization clusters, transactional databases, and latency-sensitive enterprise applications.
2. With sequential read performance of 3000 MB/s, this SSD accelerates large-file movement, reducing backup windows and speeding up analytics, media, and dataset loading workflows.
3. Random read performance of 270,000 K IOPS supports heavy mixed-user environments by sustaining responsive access to small-block data in VMs, OLTP systems, and high-concurrency read caches.
4. Rated at 0.32 DWPD, the drive is best suited for read-centric enterprise deployments where predictable endurance and lower operating cost matter more than intensive daily overwrite cycles.
5. TLC V-NAND combined with a typical latency of 50 µs helps deliver dense, power-efficient storage with consistently fast response times for scalable cloud and edge server platforms.

Capacity Sweet

For the Samsung MZVLB512HAJQ-00000 512GB SSD, the nearest lower capacity in the same series is 256GB, and the nearest higher capacity is 1TB. Across this OEM enterprise-oriented family, sequential read/write and random IOPS are generally in the same performance class, with capacity being the main differentiator. At 512GB, this drive sits in the sweet spot of the series. Compared with the 256GB model, it gives much better headroom for OS images, application growth, logs, and overprovisioning, reducing capacity pressure in daily operation. Compared with the 1TB model, it preserves nearly the same practical performance profile while keeping acquisition cost and fleet-level budget under tighter control. It is especially well suited for medium-scale virtualization clusters, such as hosting boot and utility volumes for about 40 to 60 business application instances.

FAQ