Western Digital Ultrastar DC HC550 16TB

Brand: Western Digital | Category: Enterprise HDDs

SKU: WD-HC550-16TB | Part #: WD-HC550-16TB | MPN: WD-HC550-16TB

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When you're deploying enterprise storage at scale—particularly in JBOD configurations where dozens or hundreds of drives share power rails and cooling ducts—idle power consumption becomes as critical as capacity. The Western Digital Ultrastar DC HC550 16TB (part number WD-HC550-16TB) consumes just 4.2W at idle across a SATA interface, a figure that compounds meaningfully across large installations. In active read/write operations, the drive draws 6.8W typical, allowing storage architects to pack substantially more capacity into existing power budgets without infrastructure upgrades. For organisations running data centres across the GCC region or managing multi-petabyte repositories in AI training labs, this efficiency translates directly to operational cost reduction and thermal headroom.

The Ultrastar DC HC550 uses conventional magnetic recording (CMR) across nine platters, spinning at 7,200 RPM to deliver sustained transfer rates up to 269MB/s. That throughput suits sequential workloads common in backup, archive, and machine learning dataset ingest scenarios where latency tolerance is high but bandwidth matters. The 512MB cache buffer absorbs burst writes and reduces the penalty of rotational latency in mixed workloads. Western Digital rates the drive for 550TB of annual workload, positioning it firmly in the enterprise-class segment rather than consumer or prosumer territory; sysadmins and storage infrastructure teams treating these drives as disposable will find themselves replacing them far sooner than justified. The mean time between failures of 2.5 million hours reflects Western Digital's confidence in the design, though that figure always assumes clean environment, controlled temperature, and proper vibration isolation—conditions more reliably met in purpose-built data centres than edge deployments.

What distinguishes the Ultrastar DC HC550 in crowded 16TB HDD market is the third-generation HelioSeal platform. Western Digital hermetically seals helium inside the drive enclosure, reducing air density and friction without sacrificing rotational stability or performance. This approach allows the manufacturer to fit nine platters into a standard 3.5-inch form factor without the acoustic noise, vibration, and thermal overhead of air-filled alternatives. For storage architects planning multi-node systems, lower vibration means tighter packing density and fewer cross-drive interference patterns in JBOD shelves. The design also supports 600,000 load/unload cycles—substantial enough for active-archive and tiered storage scenarios where drives may spin down during off-peak hours. Operating shock tolerance of 70G and non-operating shock of 250G provide reassurance during transport and minor rack-mounting incidents, though neither specification should excuse careless handling in fragile supply chains typical of the region.

The WD-HC550-16TB offers both SATA 6Gb/s and SAS 12Gb/s interface options, allowing integration into legacy SATA-based infrastructure or newer SAS environments without requiring drive-level re-specification. For customers managing multi-vendor storage estates, this flexibility reduces SKU fragmentation. Encryption options—including Self-Encrypting Drive (SED) variants and FIPS 140-2 certified models—accommodate regulated workloads in financial services, healthcare, and government sectors across the GCC. Instant Secure Erase (ISE) enables rapid decommissioning of retired drives without relying on external degaussing equipment, a practical advantage when managing supply-chain logistics in environments spanning multiple jurisdictions. The rotational vibration sensors provide real-time feedback to host systems, allowing proactive alerting before mechanical degradation manifests as data integrity risk. Operating temperature range from 0°C to 60°C is broad enough for most data-centre environments, though sustained operation near the upper limit will reduce MTBF projections and should trigger review of cooling architecture.

Network engineers and AI infrastructure teams sourcing bulk capacity for training clusters, data warehouses, or distributed backup systems will find the Ultrastar DC HC550 a reliable foundation component. Its power envelope, workload rating, and interface flexibility make it equally suitable for hyperscale deployments and mid-market organisations building on-premises alternatives to cloud storage tiers. The 16TB capacity balances raw storage density against mechanical complexity and cost per terabyte, landing in the "goldilocks" zone for most enterprise refresh cycles. At approximately 650 grams per unit, drive weight remains manageable for technicians swapping failed units or populating large arrays, though that seeming detail matters less than it once did as many organisations now treat HDD replacement as data-centre automation rather than manual labour.

Performance and Deployment Specifications

• 16TB capacity with sustained transfer rate up to 269MB/s across SATA and SAS interfaces; 550TB annual workload rating supports continuous-duty and archive-tier applications
• Third-generation HelioSeal helium-filled design enables nine-platter density with reduced vibration, acoustic noise, and power overhead compared to air-filled alternatives
• Low idle power consumption of 4.2W and active draw of 6.8W (SATA) minimizes total cost of ownership in large-scale JBOD and multi-drive shelf deployments
• MTBF of 2.5 million hours with 600,000 load/unload cycles; rotational vibration sensing enables predictive health monitoring and reduces unplanned downtime in managed environments
• SED, FIPS 140-2, and Instant Secure Erase encryption options satisfy compliance requirements in regulated industries including financial services, healthcare, and government
• SATA 6Gb/s and SAS 12Gb/s connectivity options allow seamless integration into mixed-interface storage infrastructure without drive-level re-qualification
• Operating shock tolerance of 70G (2ms) and non-operating shock of 250G (2ms) provide resilience during transport, racking, and minor mechanical incidents in logistics-heavy supply chains

Omnixon Global stocks the Western Digital Ultrastar DC HC550 16TB (WD-HC550-16TB) as a core enterprise HDD offering, serving data-centre operators, system integrators, and AI infrastructure teams across the UAE, GCC, and extended Asia-Europe corridor. We maintain inventory in both SATA and SAS configurations, with rapid availability for custom builds, JBOD populates, and emergency replacement scenarios. Our technical team can advise on platform compatibility, cooling load forecasting, and power-budgeting when integrating large quantities into existing or greenfield deployments. To discuss requirements, obtain current part availability, or request a formal quotation for your project, please submit an RFQ through our website or contact our enterprise sales desk directly.