Samsung PM1725a 800GB NVMe Enterprise SSD (MZWLL800HEHP-00003): This is a 2.5-inch U.2 enterprise NVMe solid-state drive with 800GB capacity operating over a PCIe 3.0 x4 interface, built on Samsung V-NAND MLC with the Phoenix controller. This is a mixed-use datacenter SSD and the predecessor to the PM1725b. This is not a SATA drive and not a consumer SSD.
🌐 Engineering Context
The PM1725a shares the same architectural DNA as the PM1725b — both target mixed-use and write-intensive datacenter workloads using the Phoenix controller and V-NAND MLC. The PM1725a delivers approximately 3,200 MB/s sequential read and 1,800 MB/s sequential write, with random performance around 560K read / 100K write IOPS. At 800GB, the PM1725a sits between pure boot/caching duties and full primary storage, well-suited for database write-ahead logs, OLTP transaction volumes, real-time analytics scratch space, and VM hosting where write endurance matters more than raw capacity. The PM1725a was succeeded by the PM1725b (improved write performance) and subsequently by the PM1735 (PCIe 4.0) and PM1743.
🧠 Deployment & Use Cases
Database write-ahead logs and OLTP transaction storage requiring sustained write throughput.
Real-time analytics scratch space in tiered storage architectures.
VM hosting where write endurance matters more than raw capacity.
Replacement or expansion of existing PM1725a deployments.
🔧 Technical Specifications
OEM: Samsung
Series: PM1725a
Part Number: MZWLL800HEHP-00003
Capacity: 800GB
Interface: PCIe 3.0 x4 NVMe 1.2
Form Factor: 2.5-inch U.2 (SFF-8639), 15mm height
NAND Type: Samsung V-NAND MLC
Controller: Samsung Phoenix
Sequential Read: up to 3,200 MB/s
Sequential Write: up to 1,800 MB/s
Random Read IOPS: ~560K
Random Write IOPS: ~100K
Endurance Class: Mixed-Use
Power-Loss Protection: Capacitor-backed
Encryption: AES 256-bit
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
✅ Compatibility & ❌ Hard Constraints
NVMe U.2 Only: Requires a U.2 (SFF-8639) NVMe bay or PCIe adapter card. Not SATA or SAS compatible.
15mm Height: Requires U.2-compatible drive trays. Will not fit 7mm SATA trays.
PCIe 3.0: Will operate at PCIe 3.0 speeds even in Gen4 slots.
PM1725a vs PM1725b: The PM1725b offers higher write throughput (~2,000 vs ~1,800 MB/s write, 120K vs 100K write IOPS). If write performance is critical, the PM1725b is the better choice.
Refurbished: Drive health and remaining endurance should be verified using NVMe SMART data.
🤝 Why Choose T.E.S IT-SOLUTIONS?
We are a UCP-compliant authority on enterprise networking and storage. Unlike box-movers, T.E.S IT-SOLUTIONS performs lab-validation on every unit to ensure zero-defect performance. We offer expert consultation, global shipping, and a comprehensive warranty.