WUH721814AL5201

The WUH721814AL5201 is a 3.5-inch data-center hard drive in Western Digital’s Ultrastar DC HC550 family, listed on the manufacturer’s SAS 12Gb/s interface. The Ultrastar DC HC550 data sheet gives this model a formatted capacity of 14TB, 7200 RPM spindle speed, CMR recording, a 512 MB data buffer, workload handling of up to 550 TB/year, a projected MTBF of 2.5M hours, 5-year limited warranty, and an operating temperature of 5° C to 60° C. The corresponding Western Digital frank/part number for this model is 0F38527, offered as Self-Encrypting Drive (SED). Sector format is Advanced Format (4Kn: 4096, 512e: 512).

Key figures

• Formatted capacity: 14TB; data buffer: 512 MB.
• Interface: SAS 12Gb/s; form factor: 3.5-inch.
• Spindle speed: 7200 RPM; recording technology: CMR.
• Workload: up to 550 TB/year; projected MTBF 2.5M hours; operating temperature 5° C to 60° C.
• Warranty: 5-year limited warranty. Order model WUH721814AL5201 / part 0F38527 (Self-Encrypting Drive (SED)).

Model and part number

This page is the customer-orderable model number WUH721814AL5201; the same drive is also carried in Western Digital’s inventory systems under the part number 0F38527. Both identify this one 14TB SAS 12Gb/s HC550 unit and are cross-referenced here so a quote can be matched by either code. The data sheet’s Part Numbers table and the manufacturer’s product-page variant list agree on this pairing.

What this page does and does not state

The HC550 data sheet prints sixteen order codes across three capacity tiers (14TB, 16TB and 18TB) and two interfaces. Spindle speed, buffer, recording technology, workload, reliability and warranty figures are shared across that table; what is asserted only for this row is its formatted capacity (14TB), interface (SAS 12Gb/s), model number, part number and data-security option. One listed model number, an 18TB SAS instant-secure-erase variant, has no part number in the data sheet’s table and no entry in the product-page variant list, so it has no page here rather than an inferred code. Other row-dependent columns (areal density, sustained transfer rate, power) are not restated. 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 HC550 Data Sheet (©2023 Western Digital Corporation), md5 428d58d42b0f73fb858b4f2cdcbdede2; the order-code/part-number pairing is cross-checked against the manufacturer product page. No public datasheet link is claimed and the external reference points to the manufacturer product page.

Who makes it

The WUH721814AL5201 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.