WUS721010AL5201

The WUS721010AL5201 is a 3.5-inch data-center hard drive in Western Digital’s Ultrastar DC HC330 family, part of the air-filled HC300-series CMR platform, listed on the manufacturer’s SAS 12Gb/s interface. The Ultrastar DC HC300-Series data sheet gives the 10TB models 7200 RPM spindle speed, a 256 MB data buffer, workload handling of up to 550TB per year, an MTBF of 2M hours with a 0.44% annualized failure rate, 5-year limited warranty, and an operating temperature of 5° to 60°C.

Key figures

• Formatted capacity: 10TB; data buffer: 256 MB.
• Interface: SAS 12Gb/s; form factor: 3.5-inch.
• Spindle speed: 7200 RPM; recording technology: CMR (air platform).
• Workload: up to 550TB per year; MTBF 2M hours; AFR 0.44%; operating temperature 5° to 60°C.
• Warranty: 5-year limited warranty. Order model WUS721010AL5201 (Self-Encrypting Drive (SED)).

Model number

This page is the customer-orderable model number WUS721010AL5201, listed in the data sheet’s Model Numbers table in the 10TB column. The data sheet’s model-number guide decodes this series with a worked example of one SATA 10TB order code and states that the capacity digits in WUS721010 mean 10TB for this model. This data sheet does not publish a frank/part-number table, so no secondary part code is claimed here; the model number above is the manufacturer’s own order code.

What this page does and does not state

The five 10TB order codes share the spindle speed, buffer, recording technology, workload, reliability and warranty figures above; what differs by code, and what is asserted only for this row, is the interface (SAS 12Gb/s) and the data-security option. The HC300-Series data sheet is one combined table for the whole series (10TB, 8TB, 6TB, 4TB and 2TB columns), so its per-row environmental and areal columns are stated by capacity tier; this page quotes only the shared 10TB figures and does not restate sector-format details because the series table mixes 512n/512e/4Kn columns with footnoted availability. MTBF and AFR are given by the manufacturer as projected estimates, not measured values. The manufacturer publishes no temperature-grade/qualification standard or lifecycle statement for this family, so none is claimed here.

Data source

Figures are taken from the manufacturer data sheet Ultrastar DC HC300-Series Data Sheet (© 2025 Western Digital Corporation), Sept 2025, md5 7ed1e9ee0249956df9f3b85d9f9d4431. This is a manufacturer data-sheet copy, so no public datasheet link is claimed and the external reference points to the manufacturer product page.

Who makes it

The WUS721010AL5201 is made by Western Digital Corporation, a United States–headquartered data storage company based in San Jose, California. © 2025 Western Digital Corporation or its affiliates.