Western Digital DCHC550 18TB drive top view for high-capacity data centers.
Western Digital DCHC550 18TB drive side profile for rack NAS and servers.
Western Digital DCHC550 18TB HelioSeal interior emphasizes low friction and efficiency.
Western Digital DCHC550 18TB drive in NAS rack demonstrates 6Gb/s SATA compatibility.
Western Digital DCHC550 18TB drive shows 512MB cache for faster bursts.
Western Digital DCHC550 18TB drive energy-saving design reduces power per TB.
Western Digital DCHC550 18TB drive promises strong MTBF and reliability in data centers.

Western Digital

Western Digital DC HC550 18TB Internal HDD for Surveillance & NAS | 7200RPM, 6Gb/s SATA, 512MB Cache

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$645.46

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Why customers choose Nexoltic

Overview

When you manage vast amounts of data, you need a drive that blends capacity with performance and reliability. The Western Digital DC HC550 18TB internal hard drive is engineered for data centers, cloud storage servers, enterprise NAS, and surveillance systems that demand dense storage with steady throughput. With an 18 TB footprint in a 3.5-inch form factor, this drive supports large archives, virtualized workloads, and sustained video retention while remaining compatible with standard SATA interfaces.

Powered by OptiNAND technology, this model integrates flash with magnetic recording to optimize write operations and add a layer of protection during power events. The HelioSeal helium fill reduces friction and enables higher areal density, contributing to efficient performance in dense rack environments. In practical terms, you may experience improved usable capacity per drive and better energy efficiency across your array, with measured idle power as low as 5.1W and read/write power around 6.8W depending on workload.

Key specs at a glance

  • Capacity and performance: 18 TB, 7200 RPM, 512 MB cache for responsive bursts
  • Efficient design: HelioSeal helium technology lowers friction and power consumption
  • Fast data access: Sustained read/write speeds up to 260 MB/s for heavy workloads
  • Durability: High endurance with robust reliability metrics for 24/7 operation
  • Energy efficiency: Significant per-TB efficiency improvement with optimized power draw
  • Connectivity: SATA 6 Gb/s interface for broad compatibility with existing systems

Ideal use scenarios

  • Surveillance hubs requiring long-term video retention and large media libraries
  • Enterprise NAS clusters handling virtualization, backups, and data services
  • Cloud-ready storage pools and data centers needing scalable, dependable capacity

Choosing the HC550 18TB drive aligns with a future-ready storage partner that emphasizes capacity, reliability, and efficiency. While results vary by workload, this drive is positioned to support demanding, sustained operations over time, backed by a robust design and long-term support from Western Digital.

FAQ

Q: What workloads is the WD HC550 18TB drive suited for?

A: Ideal for data centers, enterprise NAS, surveillance, and media servers needing large capacity and steady performance.

Q: How does the HC550 balance efficiency and reliability?

A: HelioSeal and OptiNAND reduce power use, while MTBF reaches 2.5 million hours and TBW 550TB, supporting durable long-term operation.

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