General

Brand	Samsung
Model	PM1725b
Capacity	6.4TB
Usage Class	Enterprise

Interface

Host Interface	NVMe
Total Interface Bandwidth	32 Gb/s

Physical Dimension

Form Factor	HHHL

Flash & Endurance

NAND Flash	TLC V-NAND
Drive Writes Per Day	5
Total Bytes Written	58400 TBW

Performance

Sequential Read	6500 MB/s
Sequential Write	2600 MB/s
Random Read IOPS	1000000
Random Write IOPS	170000
Average Latency	90 μs

Reliability

Mean Time Between Failures	2 Million Hours
Uncorrectable Bit Error Rate	1.0×10⁻¹⁷
Power Loss Protection	Yes

Part Number

MPN	MZ-PLL6T4A

Engineer's Note

The MZ-PLL6T4B PM1725b combines 6.4TB of TLC V-NAND with 6,500/2,600 MB/s sequential performance and up to 1,000,000/170,000 IOPS, making it a strong fit for mixed enterprise database, virtualization, and analytics workloads that need both very high read concurrency and sustained write endurance at 5 DWPD. Compared with the earlier MZ-PLL6T4A, the MZ-PLL6T4B represents a later PM1725b generation refresh that preserves the proven 58,400 TBW endurance profile while delivering a more current platform choice for long-life, write-intensive NVMe deployments.

Endurance & Reliability

With an endurance rating of 58,400 TBW and 5 DWPD, the MZ-PLL6T4B is designed for sustained, write-intensive enterprise workloads over its full service life. In practical terms, this level of endurance is far beyond typical OS boot or general application workloads, giving buyers strong confidence that it can serve as a system drive for many years with substantial write headroom. For enterprise reliability, the drive includes Power Loss Protection (PLP), which helps preserve in-flight data and protect metadata integrity if power is unexpectedly interrupted. Its ultra-low UBER of 1.0E-17, together with a 2 million hour MTBF, indicates very high data integrity and dependable long-term operation in business-critical environments.

Technical Specs & Insights

1. The NVMe interface, paired with ultra-fast sequential throughput, accelerates large dataset ingestion, VM boot storms, and backup recovery in enterprise servers.
2. Its exceptional random-read capability sustains responsive performance for high-concurrency databases, virtualization clusters, and metadata-intensive cloud workloads.
3. The strong endurance rating makes it well suited for write-heavy environments such as OLTP systems, caching tiers, and analytics pipelines that are rewritten continuously.
4. TLC V-NAND provides a balanced mix of cost efficiency, density, and sustained reliability, helping enterprises scale flash deployment without sacrificing operational stability.
5. The low typical latency helps reduce application response time and tail-latency spikes, which is critical for real-time transaction processing and latency-sensitive services.

Capacity Sweet

Lower capacity: 3.2TB Higher capacity: 12.8TB The 6.4TB MZ-PLL6T4B sits at the sweet spot of this enterprise SSD family. Compared with the 3.2TB version, it gives much better headroom for data growth, VM density, and mixed application workloads without changing the familiar enterprise performance profile. Compared with the 12.8TB model, it delivers a more balanced cost-per-drive while keeping latency, throughput, and IOPS at a similar class level. This makes 6.4TB an ideal choice for mid-scale deployments, such as a virtualization cluster supporting around 60 to 80 general-purpose virtual machines or a compact all-flash database tier.

FAQ