ST3450856SS Seagate Cheetah 15K 0.45TB SAS 16 MB 3.5" Server HDD

High-Performance 3.5-inch Enterprise SAS HDD featuring 15K rotational IOPS with the ST3450856SS

The ST3450856SS is a 3.5-inch enterprise HDD designed for SAS backplanes where predictable latency and sustained random I/O matter more than maximum capacity. In classic dual-socket server platforms, the ST3450856SS supports dense drive bays and proven RAID controllers, delivering a small-capacity performance tier for transactional data, metadata, logs, and hot working sets that benefit from 15,000 RPM access characteristics.

Architecturally, ST3450856SS aligns with storage stacks built around SAS HBAs and hardware RAID, providing a reliable spinning-disk layer for systems that do not require NVMe while still demanding 24x7 duty cycles. The CMR recording method supports consistent write behavior under queue depth, and the 16MB cache helps smooth burst traffic at the drive level. For power and thermal planning, the ST3450856SS maintains enterprise operational envelopes with defined idle and operating consumption, enabling predictable slot-level budgeting in legacy and mixed-generation racks.

Why Choose the ST3450856SS?

The ST3450856SS is a practical choice when you need high-IOPS SAS media in existing 3.5-inch bays without redesigning the platform around newer PCIe storage. ST3450856SS improves density-to-performance in small-capacity tiers, supports controlled scaling by adding spindles per shelf, and fits operational models that prioritize service continuity and deterministic behavior under steady transactional load.

Seagate engineers the Cheetah line for enterprise reliability, focusing on sustained operation, controlled vibration tolerance in multi-drive enclosures, and consistent performance characteristics aligned with data centre qualification processes and standard SAS infrastructure practices.

Key Applications:

• Legacy SAS RAID arrays
• High-IOPS transactional databases
• Boot and OS mirror volumes
• Log and journal tiers
• Virtualization datastore hot tiers

At Happyware - Server Hardware you benefit from non-binding offers tailored to your deployment plan for ST3450856SS refresh projects, and you can secure an extended warranty up to 6 years to protect long-lifecycle SAS environments.