Samsung MZ-7WD4800/0H3 480GB SM843T SATA 6.0 Gb/s 2.5 inch Mixed Use / Data Center Solid State Drive

General

Brand	Samsung
Model	SM843T
Capacity	480GB
Usage Class	Mixed Use / Data Center

Interface

Host Interface	SATA 6.0 Gb/s
Total Interface Bandwidth	6 Gb/s

Physical Dimension

Form Factor	2.5

Flash & Endurance

NAND Flash	Samsung 24nm eMLC
Drive Writes Per Day	3.7
Total Bytes Written	3240 TBW

Performance

Sequential Read	500 MB/s
Sequential Write	370 MB/s
Random Read IOPS	98000
Random Write IOPS	15000
Average Latency	100 μs

Reliability

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

Part Number

MPN	MZ7WD480HAGM

Engineer's Note

Compared with the earlier MZ7WD480HAGM, the MZ-7WD4800/0H3 SM843T delivers a later-generation 480GB enterprise SATA design built on Samsung 24nm eMLC, combining 3.7 DWPD and 3,240 TBW with up to 500/370 MB/s and 98K/15K IOPS for a stronger endurance-to-capacity balance. It is especially well suited to read-intensive virtualization, database logging, and cache-tier deployments where higher write tolerance than typical SATA SSDs is required without moving to a higher-cost SAS or PCIe tier.

Endurance & Reliability

With an endurance rating of 3240 TBW and 3.7 DWPD, this 480GB SSD is designed to sustain about 1.8TB of host writes every day over a 5-year usage model, which is well above the write volume of most typical boot, OS, and general server workloads. In practical terms, for lighter mixed-use scenarios such as a system or application drive, it can comfortably support long-term operation and can serve as a worry-free system disk for up to around 10 years under moderate daily write levels. For enterprise reliability, built-in power loss protection (PLP) helps preserve in-flight data and protect metadata integrity if power is suddenly interrupted, reducing the risk of corruption and unclean shutdown issues. Its UBER rating of 1.0E-17 means an extremely low probability of unrecoverable bit errors, while the 2 million hour MTBF further supports dependable 24/7 deployment in business-critical environments.

Technical Specs & Insights

1. The SATA interface makes this drive a drop-in fit for mainstream enterprise storage backplanes, enabling low-risk upgrades and broad compatibility across existing server and appliance fleets.
2. Its near–bus-limit sequential read performance speeds up boot storms, backup restores, and large dataset streaming in read-heavy infrastructure.
3. Strong random read capability helps virtualized workloads, OLTP databases, and metadata-intensive applications sustain fast response under high concurrency.
4. The enterprise endurance rating supports write-intensive duty cycles such as logging, caching, and mixed-use transactional environments without frequent replacement planning.
5. Samsung’s eMLC NAND and low typical latency deliver the write resilience and consistently quick access times required for predictable QoS in mission-critical systems.

Capacity Sweet

Lower-capacity reference: 240GB Higher-capacity reference: 960GB Capacity positioning analysis: In this series, the 480GB model sits at the practical sweet spot. Compared with the 240GB version, it provides much better headroom for OS images, application stacks, logs, and moderate data growth, reducing the risk of early capacity pressure. Compared with the 960GB version, it delivers nearly the same enterprise-class read/write and random IOPS behavior while keeping acquisition cost and replacement budget more controlled. This makes 480GB especially well suited for mid-scale virtualization clusters, such as shared boot and application storage for about 40 to 60 virtual machines.

FAQ