General

Brand	Samsung
Model	SM825
Capacity	400GB
Usage Class	Enterprise

Interface

Host Interface	SATA
Total Interface Bandwidth	3 Gb/s

Physical Dimension

Form Factor	2.5

Flash & Endurance

NAND Flash	eMLC
Drive Writes Per Day	10
Total Bytes Written	7300 TBW

Performance

Sequential Read	250 MB/s
Sequential Write	220 MB/s
Random Read IOPS	43000
Random Write IOPS	11000
Average Latency	55 μs

Reliability

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

Part Number

MPN	MZ5EA200HMDR

Engineer's Note

Samsung’s SM825 (MZ5EA400HMFP-000H3) is a high-endurance 400GB SATA SSD built on eMLC NAND, delivering 10 DWPD and 7,300 TBW for write-intensive boot, cache, logging, and mixed enterprise workloads that need predictable SATA reliability. Compared with the previous-generation MZ5EA200HMDR, this model doubles usable capacity to 400GB while preserving enterprise-class endurance, making it a stronger drop-in upgrade where higher drive density and longer service life matter more than peak interface speed.

Endurance & Reliability

With an endurance rating of 7,300 TBW, this SSD is designed for very write-intensive enterprise use and can sustain the equivalent of rewriting its full capacity about 10 times per day over a five-year service life. In typical workloads such as OS boot, virtualization, logging, or mixed application storage, this provides a very large endurance margin and supports long-term, worry-free operation. Its built-in power loss protection (PLP) helps preserve in-flight data and critical metadata during an unexpected power interruption, reducing the risk of corruption and improving service continuity. An UBER of 1.0E-16, together with a 2 million hour MTBF, reflects enterprise-class data integrity and reliability, giving procurement teams confidence for business-critical deployments.

Technical Specs & Insights

1. The SATA interface makes this drive an easy drop-in upgrade for legacy enterprise servers and storage arrays, enabling dependable deployment without backplane or controller changes.
2. Its sequential read performance is well suited to steady data access workloads such as boot volumes, log retrieval, and archival database scanning where consistency matters more than peak bandwidth.
3. Strong random read capability helps virtualized infrastructure and metadata-heavy applications respond faster under high-concurrency access patterns.
4. With a 10 DWPD endurance rating, the drive is built for write-intensive enterprise environments such as OLTP, caching, and continuous logging, reducing replacement risk over its service life.
5. eMLC NAND combined with low typical latency provides the reliability and predictable responsiveness required for mission-critical workloads that cannot tolerate inconsistent flash behavior.

Capacity Sweet

Lower capacity reference: 200GB Higher capacity reference: 800GB The 400GB MZ5EA400HMFP-000H3 sits at the sweet spot of this series. Compared with the 200GB model, it gives meaningfully more headroom for OS images, application growth, log retention, and overprovisioning without changing the familiar enterprise-class performance profile. Compared with the 800GB option, it typically delivers a better balance between acquisition cost, usable capacity, and consistent latency, making it easier to standardize across larger fleets. In practice, this capacity is well suited for mid-size virtualization clusters, such as hosting boot and utility volumes for around 40 to 60 mixed-workload virtual machines.

FAQ