Samsung MZ-77E250 250 GB 870 EVO SATA 6Gb/s 2.5 inch Client Solid State Drive

General

Brand	Samsung
Model	870 EVO
Capacity	250 GB
Usage Class	Client

Interface

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

Physical Dimension

Form Factor	2.5

Flash & Endurance

NAND Flash	Samsung V-NAND 3-bit TLC
Drive Writes Per Day	0.3
Total Bytes Written	150 TBW

Performance

Sequential Read	560 MB/s
Sequential Write	530 MB/s
Random Read IOPS	98000
Random Write IOPS	88000
Average Latency	130 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	MZ-76E250

Engineer's Note

Compared with the previous-generation MZ-76E250, the Samsung 870 EVO 250GB (MZ-77E250) raises peak SATA performance from roughly 550/520 MB/s to 560/530 MB/s, pushing the SATA 6Gb/s interface closer to its practical limit for faster boot, launch, and file-copy responsiveness. Its Samsung V-NAND 3-bit TLC, 98,000/88,000 IOPS random performance, and 150 TB TBW endurance make it the stronger upgrade choice in the 250 GB SATA tier for client systems that need higher sustained responsiveness without moving to NVMe.

Endurance & Reliability

With an endurance rating of 150 TBW and 0.3 DWPD, this SSD is well suited for typical boot-drive and general business PC workloads, where daily writes are usually far below its limit. In practical terms, 150 TBW equals about 41 GB of writes per day over 10 years, so for OS, office applications, and normal endpoint usage, it can deliver long, worry-free service. The specified UBER of 1.0E-15 means the drive is designed for a very low rate of unrecoverable bit errors, supporting dependable day-to-day data integrity, while the 1.5 million-hour MTBF reflects solid overall reliability expectations. This model does not include power-loss protection (PLP), so it is best positioned for client or light-duty systems rather than write-critical enterprise caching environments, and procurement can further mitigate risk by pairing it with regular backups and stable power protection.

Technical Specs & Insights

1. The SATA interface lets this drive drop into widely deployed enterprise storage backplanes without platform changes, while still pushing the bus close to its practical ceiling for faster boot, backup, and file-serving operations.
2. Its strong small-block read capability helps virtual desktops, web platforms, and database indexes stay responsive under heavy concurrent lookup traffic.
3. The endurance profile is best suited to read-centric enterprise workloads such as content delivery, operating system images, and reference data that see predictable write pressure.
4. Samsung’s stacked TLC V-NAND balances cost efficiency, power discipline, and stable capacity scaling, making it a practical choice for dense fleet deployments.
5. The low typical access latency reduces wait time per transaction, improving application responsiveness in latency-sensitive server tasks.

Capacity Sweet

Reference capacities in the same series for MPN MZ-77E250 (250 GB): Lower capacity: No smaller official capacity in this series Higher capacity: 500 GB Capacity positioning analysis: At 250 GB, this model sits in the practical sweet spot of the series. Since there is no lower-capacity official sibling, 250 GB effectively serves as the entry point while still giving enough headroom for OS images, patches, logs, and moderate application growth without immediate capacity pressure. Compared with the 500 GB version, it preserves much of the same day-to-day SATA performance profile while offering a more budget-efficient cost point. It is best suited for small virtualization clusters, such as hosting boot volumes for about 30 to 40 light-duty virtual machines.

FAQ