WUH721818ALE6L1 WD Ultrastar DC HC550 18TB SATA 512 MB 3.5" Server HDD

High-Capacity 3.5in SATA Datacenter HDD optimised for nearline scale-out storage with the WUH721818ALE6L1

The WUH721818ALE6L1 is a WD Ultrastar DC HC550 18TB 3.5in enterprise HDD designed to extend storage density in CPU-centric server platforms and JBOD enclosures where capacity, predictability, and fleet manageability are primary constraints. In typical dual-socket x86 architectures, the WUH721818ALE6L1 complements compute and memory resources by enabling large, sequentially efficient repositories without consuming scarce PCIe lanes needed for GPUs, high-speed networking, or NVMe tiers.

Built for SATA backplanes and HBA-based expansion, the WUH721818ALE6L1 supports 512e sector formatting for broad OS and hypervisor compatibility, while fitting cleanly into tiered storage designs that separate hot data on NVMe from bulk objects and backups on HDD. A 7200 RPM spindle and 512MB cache help stabilize throughput under mixed read/write windows, and the helium-filled mechanics reduce power and vibration sensitivity in dense racks. TDMR and EAMR recording technologies are engineered to maintain areal density and consistent performance characteristics at high capacities.

Why Choose the WUH721818ALE6L1?

The WUH721818ALE6L1 delivers a strong capacity-per-bay profile for scale-out storage nodes, backup targets, and archive tiers while maintaining enterprise reliability for 24x7 duty cycles. Hardware-based self-encrypting drive functionality supports security-driven deployment models, and the platform’s datacenter-focused design scales efficiently across large fleets where operational consistency, replacement planning, and predictable thermal envelopes matter.

WD engineers the Ultrastar portfolio around sustained workload operation, rigorous qualification, and compatibility with modern datacenter standards for power, vibration, and serviceability. With a 2.5M-hour MTBF target and TCG Enterprise SSC SED support, the WUH721818ALE6L1 aligns with governance requirements and long-life infrastructure roadmaps.

Key Applications:

• Nearline and object storage tiers
• Backup and recovery repositories
• Scale-out JBOD expansion shelves
• Log retention and compliance archives
• Virtualization bulk datastore capacity

At Happyware - Server Hardware you benefit from non-binding offers tailored to your deployment and compatibility requirements for the WUH721818ALE6L1, helping you standardize capacity expansions with clear lead times and planning. For multi-node rollouts, bulk order discount options support efficient procurement across rack and cluster builds.