Lenovo ThinkSystem S4520 960GB 3.5" SATA 6Gb/s Read Intensive SSD

The Lenovo 4XB7A77456 is a solid state drive in a 3.5-inch form factor that delivers 960 GB of storage for ThinkSystem servers and other systems that accept a SATA connection. Designed for read-intensive workloads, it uses 3D TLC NAND to give administrators a cost-effective way to accelerate boot times, application loads, and data retrieval without moving to an entirely new storage architecture.

Through a 6 Gb/s SATA interface, the drive sustains up to 550 MB/s for sequential reads and 510 MB/s for sequential writes. In mixed or random workloads, it can reach 90,000 IOPS on 4 KB reads and 43,000 IOPS on writes, helping virtual machines, analytics dashboards, and content delivery services stay responsive during peak demand.

Data protection features are built in. Hardware-based 256-bit AES encryption guards sensitive information, end-to-end data path protection helps prevent silent corruption, and Enhanced Power Loss Protection maintains data integrity during unexpected outages. Thermal throttling keeps performance stable in dense server racks, while a 3 drive-writes-per-day endurance rating offers confidence for frequent read cycles and moderate writes.

The drive is a practical upgrade for administrators who want dependable flash storage in database servers, hyper-converged clusters, or edge appliances where consistent read performance and robust safeguards matter more than extremely high write throughput.

Highlights:

• 960 GB capacity built on 3D TLC NAND technology
• 6 Gb/s SATA interface with up to 550 MB/s sequential read and 510 MB/s sequential write speeds
• 4 KB random performance up to 90,000 IOPS for reads and 43,000 IOPS for writes
• 256-bit AES hardware encryption and end-to-end data protection
• Enhanced Power Loss Protection and thermal management features
• 3 drive-writes-per-day endurance rating for sustained reliability
• 3.5-inch form factor for straightforward installation in ThinkSystem and compatible servers