0B48718 WD Ultrastar DC HC555 18TB SATA 512 MB 3.5" Server HDD

High-Density 3.5in Datacenter HDD for capacity-optimised storage with the 0B48718

The 0B48718 is a WD Ultrastar DC HC555 18TB 3.5in internal enterprise HDD engineered for scale-out storage nodes where predictable throughput, high capacity per slot, and long service life are mandatory. Built on a 7200 RPM mechanical platform with a 512MB cache and a SATA interface using 512e sector format, the 0B48718 integrates cleanly into modern RAID backplanes and storage servers that prioritise cost-efficient capacity and operational continuity.

For storage architecture planning, the 0B48718 supports dense pools for object storage, private cloud repositories, and backup tiers where sequential performance and sustained duty cycles matter more than low-latency IOPS. Helium-filled construction combined with EAMR/TDMR recording technologies improves areal density and helps keep power within datacenter envelopes (5.3W idle, 6.4W active). The 0B48718 also adds Self-Encrypting Drive capabilities with TCG Enterprise SSC hardware encryption, enabling secure-at-rest designs without relying solely on host CPU cycles or software-based key handling.

Why Choose the 0B48718?

The 0B48718 delivers a strong density-to-performance ratio for 24x7 enterprise RAID arrays and capacity-optimised nodes, reducing rack-level drive count while maintaining a consistent SATA operational model. With a 2.5M-hour MTBF rating, the 0B48718 supports scalable fleet deployments where reliability, service intervals, and predictable replacement planning directly impact storage availability.

WD engineers the Ultrastar platform with a focus on datacenter qualification, sustained workload tolerance, and interoperability across common storage controllers and enclosures, aligning the drive design with modern capacity tiers and security requirements.

Key Applications:

• Capacity-optimised storage nodes
• Backup and archive repositories
• Scale-out object storage
• Private cloud storage pools
• 24x7 enterprise RAID arrays

At Happyware - Server Hardware you benefit from non-binding offers tailored to your storage architecture and rollout schedule, plus an extended warranty of up to 6 years to protect long-lived 0B48718 deployments in enterprise environments.